diff --git a/assignment-client/src/avatars/ScriptableAvatar.cpp b/assignment-client/src/avatars/ScriptableAvatar.cpp
index bf5d87a6bf..6188971e1c 100644
--- a/assignment-client/src/avatars/ScriptableAvatar.cpp
+++ b/assignment-client/src/avatars/ScriptableAvatar.cpp
@@ -19,6 +19,9 @@
 #include <AnimUtil.h>
 #include <ClientTraitsHandler.h>
 #include <GLMHelpers.h>
+#include <ResourceRequestObserver.h>
+#include <AvatarLogging.h>
+
 
 ScriptableAvatar::ScriptableAvatar() {
     _clientTraitsHandler.reset(new ClientTraitsHandler(this));
@@ -62,11 +65,28 @@ AnimationDetails ScriptableAvatar::getAnimationDetails() {
     return _animationDetails;
 }
 
+int ScriptableAvatar::getJointIndex(const QString& name) const {
+    // Faux joints:
+    int result = AvatarData::getJointIndex(name);
+    if (result != -1) {
+        return result;
+    }
+    QReadLocker readLock(&_jointDataLock);
+    return _fstJointIndices.value(name) - 1;
+}
+
+QStringList ScriptableAvatar::getJointNames() const {
+    QReadLocker readLock(&_jointDataLock);
+    return _fstJointNames;
+    return QStringList();
+}
+
 void ScriptableAvatar::setSkeletonModelURL(const QUrl& skeletonModelURL) {
     _bind.reset();
     _animSkeleton.reset();
 
     AvatarData::setSkeletonModelURL(skeletonModelURL);
+    updateJointMappings();
 }
 
 static AnimPose composeAnimPose(const HFMJoint& joint, const glm::quat rotation, const glm::vec3 translation) {
@@ -77,10 +97,6 @@ static AnimPose composeAnimPose(const HFMJoint& joint, const glm::quat rotation,
 }
 
 void ScriptableAvatar::update(float deltatime) {
-    if (_bind.isNull() && !_skeletonFBXURL.isEmpty()) { // AvatarData will parse the .fst, but not get the .fbx skeleton.
-        _bind = DependencyManager::get<AnimationCache>()->getAnimation(_skeletonFBXURL);
-    }
-
     // Run animation
     if (_animation && _animation->isLoaded() && _animation->getFrames().size() > 0 && !_bind.isNull() && _bind->isLoaded()) {
         if (!_animSkeleton) {
@@ -146,6 +162,82 @@ void ScriptableAvatar::update(float deltatime) {
     _clientTraitsHandler->sendChangedTraitsToMixer();
 }
 
+void ScriptableAvatar::updateJointMappings() {
+    {
+        QWriteLocker writeLock(&_jointDataLock);
+        _fstJointIndices.clear();
+        _fstJointNames.clear();
+        _jointData.clear();
+    }
+
+    if (_skeletonModelURL.fileName().toLower().endsWith(".fst")) {
+        ////
+        // TODO: Should we rely upon HTTPResourceRequest for ResourceRequestObserver instead?
+        // HTTPResourceRequest::doSend() covers all of the following and
+        // then some. It doesn't cover the connect() call, so we may
+        // want to add a HTTPResourceRequest::doSend() method that does
+        // connects.
+        QNetworkAccessManager& networkAccessManager = NetworkAccessManager::getInstance();
+        QNetworkRequest networkRequest = QNetworkRequest(_skeletonModelURL);
+        networkRequest.setAttribute(QNetworkRequest::FollowRedirectsAttribute, true);
+        networkRequest.setHeader(QNetworkRequest::UserAgentHeader, HIGH_FIDELITY_USER_AGENT);
+        DependencyManager::get<ResourceRequestObserver>()->update(
+            _skeletonModelURL, -1, "AvatarData::updateJointMappings");
+        QNetworkReply* networkReply = networkAccessManager.get(networkRequest);
+        //
+        ////
+        connect(networkReply, &QNetworkReply::finished, this, &ScriptableAvatar::setJointMappingsFromNetworkReply);
+    }
+}
+
+void ScriptableAvatar::setJointMappingsFromNetworkReply() {
+    QNetworkReply* networkReply = static_cast<QNetworkReply*>(sender());
+    // before we process this update, make sure that the skeleton model URL hasn't changed
+    // since we made the FST request
+    if (networkReply->url() != _skeletonModelURL) {
+        qCDebug(avatars) << "Refusing to set joint mappings for FST URL that does not match the current URL";
+        networkReply->deleteLater();
+        return;
+    }
+    {
+        QWriteLocker writeLock(&_jointDataLock);
+        QByteArray line;
+        while (!(line = networkReply->readLine()).isEmpty()) {
+            line = line.trimmed();
+            if (line.startsWith("filename")) {
+                int filenameIndex = line.indexOf('=') + 1;
+                if (filenameIndex > 0) {
+                    _skeletonFBXURL = _skeletonModelURL.resolved(QString(line.mid(filenameIndex).trimmed()));
+                }
+            }
+            if (!line.startsWith("jointIndex")) {
+                continue;
+            }
+            int jointNameIndex = line.indexOf('=') + 1;
+            if (jointNameIndex == 0) {
+                continue;
+            }
+            int secondSeparatorIndex = line.indexOf('=', jointNameIndex);
+            if (secondSeparatorIndex == -1) {
+                continue;
+            }
+            QString jointName = line.mid(jointNameIndex, secondSeparatorIndex - jointNameIndex).trimmed();
+            bool ok;
+            int jointIndex = line.mid(secondSeparatorIndex + 1).trimmed().toInt(&ok);
+            if (ok) {
+                while (_fstJointNames.size() < jointIndex + 1) {
+                    _fstJointNames.append(QString());
+                }
+                _fstJointNames[jointIndex] = jointName;
+            }
+        }
+        for (int i = 0; i < _fstJointNames.size(); i++) {
+            _fstJointIndices.insert(_fstJointNames.at(i), i + 1);
+        }
+    }
+    networkReply->deleteLater();
+}
+
 void ScriptableAvatar::setHasProceduralBlinkFaceMovement(bool hasProceduralBlinkFaceMovement) {
     _headData->setHasProceduralBlinkFaceMovement(hasProceduralBlinkFaceMovement);
 }
diff --git a/assignment-client/src/avatars/ScriptableAvatar.h b/assignment-client/src/avatars/ScriptableAvatar.h
index 578bd84a8f..66b0b5ae3f 100644
--- a/assignment-client/src/avatars/ScriptableAvatar.h
+++ b/assignment-client/src/avatars/ScriptableAvatar.h
@@ -153,6 +153,27 @@ public:
      */
     Q_INVOKABLE AnimationDetails getAnimationDetails();
 
+    /**jsdoc
+    * Get the names of all the joints in the current avatar.
+    * @function MyAvatar.getJointNames
+    * @returns {string[]} The joint names.
+    * @example <caption>Report the names of all the joints in your current avatar.</caption>
+    * print(JSON.stringify(MyAvatar.getJointNames()));
+    */
+    Q_INVOKABLE virtual QStringList getJointNames() const override;
+
+    /**jsdoc
+    * Get the joint index for a named joint. The joint index value is the position of the joint in the array returned by
+    * {@link MyAvatar.getJointNames} or {@link Avatar.getJointNames}.
+    * @function MyAvatar.getJointIndex
+    * @param {string} name - The name of the joint.
+    * @returns {number} The index of the joint.
+    * @example <caption>Report the index of your avatar's left arm joint.</caption>
+    * print(JSON.stringify(MyAvatar.getJointIndex("LeftArm"));
+    */
+    /// Returns the index of the joint with the specified name, or -1 if not found/unknown.
+    Q_INVOKABLE virtual int getJointIndex(const QString& name) const override;
+
     virtual void setSkeletonModelURL(const QUrl& skeletonModelURL) override;
 
     virtual QByteArray toByteArrayStateful(AvatarDataDetail dataDetail, bool dropFaceTracking = false) override;
@@ -167,12 +188,23 @@ public:
 public slots:
     void update(float deltatime);
 
+    /**jsdoc
+    * @function MyAvatar.setJointMappingsFromNetworkReply
+    */
+    void setJointMappingsFromNetworkReply();
+
 private:
     AnimationPointer _animation;
     AnimationDetails _animationDetails;
     QStringList _maskedJoints;
     AnimationPointer _bind; // a sleazy way to get the skeleton, given the various library/cmake dependencies
     std::shared_ptr<AnimSkeleton> _animSkeleton;
+    QHash<QString, int> _fstJointIndices; ///< 1-based, since zero is returned for missing keys
+    QStringList _fstJointNames; ///< in order of depth-first traversal
+    QUrl _skeletonFBXURL;
+
+    /// Loads the joint indices, names from the FST file (if any)
+    void updateJointMappings();
 };
 
 #endif // hifi_ScriptableAvatar_h
diff --git a/domain-server/resources/web/js/base-settings.js b/domain-server/resources/web/js/base-settings.js
index fd404aff20..bd96f636a8 100644
--- a/domain-server/resources/web/js/base-settings.js
+++ b/domain-server/resources/web/js/base-settings.js
@@ -364,7 +364,7 @@ function validateInputs() {
       if (keyVal.length === 0) {
         empty = true
 
-        markParentRowInvalid(input);
+        markParentRowInvalid(input)
         return;
       }
 
@@ -373,11 +373,13 @@ function validateInputs() {
       _.each(otherKeys, function(otherKeyCell) {
         var keyInput = $(otherKeyCell).children('input');
 
+        var lowerNewValue  = keyVal.toLowerCase();
+
         if (keyInput.length) {
-          if ($(keyInput).val() == keyVal) {
+          if ($(keyInput).val().toLowerCase() == lowerNewValue) {
             duplicateKey = true;
           }
-        } else if ($(otherKeyCell).html() == keyVal) {
+        } else if ($(otherKeyCell).html().toLowerCase() == lowerNewValue) {
             duplicateKey = true;
         }
 
diff --git a/domain-server/src/DomainServer.cpp b/domain-server/src/DomainServer.cpp
index 69f16af8b3..258038b8f1 100644
--- a/domain-server/src/DomainServer.cpp
+++ b/domain-server/src/DomainServer.cpp
@@ -3172,24 +3172,34 @@ void DomainServer::processPathQueryPacket(QSharedPointer<ReceivedMessage> messag
         const QString PATH_VIEWPOINT_KEY = "viewpoint";
         const QString INDEX_PATH = "/";
 
-        // check out paths in the _configMap to see if we have a match
-        auto keypath = QString(PATHS_SETTINGS_KEYPATH_FORMAT).arg(SETTINGS_PATHS_KEY).arg(pathQuery);
-        QVariant pathMatch = _settingsManager.valueForKeyPath(keypath);
+        QString responseViewpoint;
 
-        if (pathMatch.isValid() || pathQuery == INDEX_PATH) {
+        // check out paths in the _configMap to see if we have a match
+        auto pathsVariant = _settingsManager.valueForKeyPath(SETTINGS_PATHS_KEY);
+
+        auto lowerPathQuery = pathQuery.toLower();
+
+        if (pathsVariant.canConvert<QVariantMap>()) {
+            auto pathsMap = pathsVariant.toMap();
+
+            // enumerate the paths and look case-insensitively for a matching one
+            for (auto it = pathsMap.constKeyValueBegin(); it != pathsMap.constKeyValueEnd(); ++it) {
+                if ((*it).first.toLower() == lowerPathQuery) {
+                    responseViewpoint = (*it).second.toMap()[PATH_VIEWPOINT_KEY].toString().toLower();
+                    break;
+                }
+            }
+        }
+
+        if (responseViewpoint.isEmpty() && pathQuery == INDEX_PATH) {
+            const QString DEFAULT_INDEX_PATH = "/0,0,0/0,0,0,1";
+            responseViewpoint = DEFAULT_INDEX_PATH;
+        }
+
+        if (!responseViewpoint.isEmpty()) {
             // we got a match, respond with the resulting viewpoint
             auto nodeList = DependencyManager::get<LimitedNodeList>();
 
-            QString responseViewpoint;
-
-            // if we didn't match the path BUT this is for the index path then send back our default
-            if (pathMatch.isValid()) {
-                responseViewpoint = pathMatch.toMap()[PATH_VIEWPOINT_KEY].toString();
-            } else {
-                const QString DEFAULT_INDEX_PATH = "/0,0,0/0,0,0,1";
-                responseViewpoint = DEFAULT_INDEX_PATH;
-            }
-
             if (!responseViewpoint.isEmpty()) {
                 QByteArray viewpointUTF8 = responseViewpoint.toUtf8();
 
diff --git a/interface/resources/qml/hifi/tablet/OpenVrConfiguration.qml b/interface/resources/qml/hifi/tablet/OpenVrConfiguration.qml
index 46817e07cf..b7d01a62e0 100644
--- a/interface/resources/qml/hifi/tablet/OpenVrConfiguration.qml
+++ b/interface/resources/qml/hifi/tablet/OpenVrConfiguration.qml
@@ -873,7 +873,7 @@ Flickable {
 
                     editable: true
                     colorScheme: hifi.colorSchemes.dark
-                    model: ["None", "Freeze", "Drop"]
+                    model: ["None", "Freeze", "Drop", "DropAfterDelay"]
                     label: ""
 
                     onCurrentIndexChanged: {
diff --git a/interface/resources/shaders/splashSkybox.frag b/interface/resources/shaders/splashSkybox.frag
index 38c89b4d26..244dad3356 100644
--- a/interface/resources/shaders/splashSkybox.frag
+++ b/interface/resources/shaders/splashSkybox.frag
@@ -1,47 +1,32 @@
-const vec3 COLOR = vec3(0x00, 0xD8, 0x02) / vec3(0xFF);
-const float CUTOFF = 0.65;
-const float NOISE_MULT = 8.0;
-const float NOISE_POWER = 1.0;
+// Replicate the default skybox texture
 
-float noise4D(vec4 p) {
-	return fract(sin(dot(p ,vec4(12.9898,78.233,126.7235, 593.2241))) * 43758.5453);
-}
-
-float worley4D(vec4 p) {
-	float r = 3.0;
-    vec4 f = floor(p);
-    vec4 x = fract(p);
-	for(int i = -1; i<=1; i++)
-	{
-		for(int j = -1; j<=1; j++)
-		{
-			for(int k = -1; k<=1; k++)
-			{
-                for (int l = -1; l <= 1; l++) {
-                	vec4 q = vec4(float(i),float(j),float(k), float(l));
-    				vec4 v = q + vec4(noise4D((q+f)*1.11), noise4D((q+f)*1.14), noise4D((q+f)*1.17), noise4D((q+f)*1.20)) - x;
-    				float d = dot(v, v);
-					r = min(r, d);
-                }
-			}
-		}
-	}
-    return sqrt(r);
-}
-
-
-vec3 mainColor(vec3 direction) {
-    float n = worley4D(vec4(direction * NOISE_MULT, iGlobalTime / 3.0));
-    n = 1.0 - n;
-    n = pow(n, NOISE_POWER);
-    if (n < CUTOFF) {
-        return vec3(0.0);
-    }
-
-    n = (n - CUTOFF) / (1.0 - CUTOFF);
-	return COLOR * (1.0 - n);
-}
+const int NUM_COLORS = 5;
+const vec3 WHITISH = vec3(0.471, 0.725, 0.825);
+const vec3 GREENISH = vec3(0.157, 0.529, 0.588);
+const vec3 COLORS[NUM_COLORS] = vec3[](
+    GREENISH,
+    GREENISH,
+    WHITISH,
+    WHITISH,
+    vec3(0.6, 0.275, 0.706)    // purple
+);
+const float PI = 3.14159265359;
+const vec3 BLACK = vec3(0.0);
+const vec3 SPACE_BLUE = vec3(0.0, 0.118, 0.392);
+const float HORIZONTAL_OFFSET = 3.75;
 
 vec3 getSkyboxColor() {
-	return mainColor(normalize(_normal));
+    vec2 horizontal = vec2(_normal.x, _normal.z);
+    horizontal = normalize(horizontal);
+    float theta = atan(horizontal.y, horizontal.x);
+    theta = 0.5 * (theta / PI + 1.0);
+    float index = theta * NUM_COLORS;
+    index = mod(index + HORIZONTAL_OFFSET, NUM_COLORS);
+    int index1 = int(index) % NUM_COLORS;
+    int index2 = (index1 + 1) % NUM_COLORS;
+    vec3 horizonColor = mix(COLORS[index1], COLORS[index2], index - index1);
+    horizonColor = mix(horizonColor, SPACE_BLUE, smoothstep(0.0, 0.08, _normal.y));
+    horizonColor = mix(horizonColor, BLACK, smoothstep(0.04, 0.15, _normal.y));
+    horizonColor = mix(BLACK, horizonColor, smoothstep(-0.01, 0.0, _normal.y));
+	return pow(horizonColor, vec3(0.4545));;
 }
diff --git a/interface/src/Application.cpp b/interface/src/Application.cpp
index 0b53e24a8e..fbad66bf55 100644
--- a/interface/src/Application.cpp
+++ b/interface/src/Application.cpp
@@ -150,7 +150,6 @@
 #include <trackers/EyeTracker.h>
 #include <avatars-renderer/ScriptAvatar.h>
 #include <RenderableEntityItem.h>
-#include <procedural/ProceduralSkybox.h>
 #include <model-networking/MaterialCache.h>
 #include "recording/ClipCache.h"
 
@@ -2819,8 +2818,6 @@ void Application::initializeGL() {
     _graphicsEngine.initializeGPU(_glWidget);
 }
 
-static const QString SPLASH_SKYBOX{ "{\"ProceduralEntity\":{ \"version\":2, \"shaderUrl\":\"qrc:///shaders/splashSkybox.frag\" } }" };
-
 void Application::initializeDisplayPlugins() {
     auto displayPlugins = PluginManager::getInstance()->getDisplayPlugins();
     Setting::Handle<QString> activeDisplayPluginSetting{ ACTIVE_DISPLAY_PLUGIN_SETTING_NAME, displayPlugins.at(0)->getName() };
@@ -2856,45 +2853,6 @@ void Application::initializeDisplayPlugins() {
 
     // Submit a default frame to render until the engine starts up
     updateRenderArgs(0.0f);
-
-#define ENABLE_SPLASH_FRAME 0
-#if ENABLE_SPLASH_FRAME
-    {
-        QMutexLocker viewLocker(&_renderArgsMutex);
-
-        if (_appRenderArgs._isStereo) {
-            _gpuContext->enableStereo(true);
-            _gpuContext->setStereoProjections(_appRenderArgs._eyeProjections);
-            _gpuContext->setStereoViews(_appRenderArgs._eyeOffsets);
-        }
-
-        // Frame resources
-        auto framebufferCache = DependencyManager::get<FramebufferCache>();
-        gpu::FramebufferPointer finalFramebuffer = framebufferCache->getFramebuffer();
-        std::shared_ptr<ProceduralSkybox> procedural = std::make_shared<ProceduralSkybox>();
-        procedural->parse(SPLASH_SKYBOX);
-
-        _gpuContext->beginFrame(_appRenderArgs._view, _appRenderArgs._headPose);
-        gpu::doInBatch("splashFrame", _gpuContext, [&](gpu::Batch& batch) {
-            batch.resetStages();
-            batch.enableStereo(false);
-            batch.setFramebuffer(finalFramebuffer);
-            batch.clearColorFramebuffer(gpu::Framebuffer::BUFFER_COLOR0, { 0, 0, 0, 1 });
-            batch.enableSkybox(true);
-            batch.enableStereo(_appRenderArgs._isStereo);
-            batch.setViewportTransform({ 0, 0, finalFramebuffer->getSize() });
-            procedural->render(batch, _appRenderArgs._renderArgs.getViewFrustum());
-        });
-        auto frame = _gpuContext->endFrame();
-        frame->frameIndex = 0;
-        frame->framebuffer = finalFramebuffer;
-        frame->pose = _appRenderArgs._headPose;
-        frame->framebufferRecycler = [framebufferCache, procedural](const gpu::FramebufferPointer& framebuffer) {
-            framebufferCache->releaseFramebuffer(framebuffer);
-        };
-        _displayPlugin->submitFrame(frame);
-    }
-#endif
 }
 
 void Application::initializeRenderEngine() {
diff --git a/interface/src/Application.h b/interface/src/Application.h
index ead7231ffc..16a11c9a3a 100644
--- a/interface/src/Application.h
+++ b/interface/src/Application.h
@@ -72,7 +72,6 @@
 #include "workload/GameWorkload.h"
 #include "graphics/GraphicsEngine.h"
 
-#include <procedural/ProceduralSkybox.h>
 #include <graphics/Skybox.h>
 #include <ModelScriptingInterface.h>
 
@@ -761,5 +760,6 @@ private:
 
     bool _showTrackedObjects { false };
     bool _prevShowTrackedObjects { false };
+
 };
 #endif // hifi_Application_h
diff --git a/interface/src/Application_render.cpp b/interface/src/Application_render.cpp
deleted file mode 100644
index 5063f6118d..0000000000
--- a/interface/src/Application_render.cpp
+++ /dev/null
@@ -1,225 +0,0 @@
-//
-//  Application_render.cpp
-//  interface/src
-//
-//  Copyright 2013 High Fidelity, Inc.
-//
-//  Distributed under the Apache License, Version 2.0.
-//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
-//
-
-#include "Application.h"
-#include <MainWindow.h>
-
-#include <display-plugins/CompositorHelper.h>
-#include <FramebufferCache.h>
-#include <plugins/PluginManager.h>
-#include <SceneScriptingInterface.h>
-#include "ui/Stats.h"
-#include "Util.h"
-
-
-//void Application::paintGL() {
-//    // Some plugins process message events, allowing paintGL to be called reentrantly.
-//
-//    _renderFrameCount++;
-//    // SG: Moved into the RenderEventHandler
-//    //_lastTimeRendered.start();
-//
-//    auto lastPaintBegin = usecTimestampNow();
-//    PROFILE_RANGE_EX(render, __FUNCTION__, 0xff0000ff, (uint64_t)_renderFrameCount);
-//    PerformanceTimer perfTimer("paintGL");
-//
-//    if (nullptr == _displayPlugin) {
-//        return;
-//    }
-//
-//    DisplayPluginPointer displayPlugin;
-//    {
-//        PROFILE_RANGE(render, "/getActiveDisplayPlugin");
-//        displayPlugin = getActiveDisplayPlugin();
-//    }
-//
-//    {
-//        PROFILE_RANGE(render, "/pluginBeginFrameRender");
-//        // If a display plugin loses it's underlying support, it
-//        // needs to be able to signal us to not use it
-//        if (!displayPlugin->beginFrameRender(_renderFrameCount)) {
-//            QMetaObject::invokeMethod(this, "updateDisplayMode");
-//            return;
-//        }
-//    }
-//
-//    RenderArgs renderArgs;
-//    glm::mat4  HMDSensorPose;
-//    glm::mat4  eyeToWorld;
-//    glm::mat4  sensorToWorld;
-//
-//    bool isStereo;
-//    glm::mat4  stereoEyeOffsets[2];
-//    glm::mat4  stereoEyeProjections[2];
-//
-//    {
-//        QMutexLocker viewLocker(&_renderArgsMutex);
-//        renderArgs = _appRenderArgs._renderArgs;
-//
-//        // don't render if there is no context.
-//        if (!_appRenderArgs._renderArgs._context) {
-//            return;
-//        }
-//
-//        HMDSensorPose = _appRenderArgs._headPose;
-//        eyeToWorld = _appRenderArgs._eyeToWorld;
-//        sensorToWorld = _appRenderArgs._sensorToWorld;
-//        isStereo = _appRenderArgs._isStereo;
-//        for_each_eye([&](Eye eye) {
-//            stereoEyeOffsets[eye] = _appRenderArgs._eyeOffsets[eye];
-//            stereoEyeProjections[eye] = _appRenderArgs._eyeProjections[eye];
-//        });
-//    }
-//
-//    {
-//        PROFILE_RANGE(render, "/gpuContextReset");
-//        _graphicsEngine.getGPUContext()->beginFrame(_appRenderArgs._view, HMDSensorPose);
-//        // Reset the gpu::Context Stages
-//        // Back to the default framebuffer;
-//        gpu::doInBatch("Application_render::gpuContextReset", _graphicsEngine.getGPUContext(), [&](gpu::Batch& batch) {
-//            batch.resetStages();
-//        });
-//    }
-//
-//
-//    {
-//        PROFILE_RANGE(render, "/renderOverlay");
-//        PerformanceTimer perfTimer("renderOverlay");
-//        // NOTE: There is no batch associated with this renderArgs
-//        // the ApplicationOverlay class assumes it's viewport is setup to be the device size
-//        renderArgs._viewport = glm::ivec4(0, 0, getDeviceSize() * getRenderResolutionScale());
-//        _applicationOverlay.renderOverlay(&renderArgs);
-//    }
-//
-//    {
-//        PROFILE_RANGE(render, "/updateCompositor");
-//        getApplicationCompositor().setFrameInfo(_renderFrameCount, eyeToWorld, sensorToWorld);
-//    }
-//
-//    gpu::FramebufferPointer finalFramebuffer;
-//    QSize finalFramebufferSize;
-//    {
-//        PROFILE_RANGE(render, "/getOutputFramebuffer");
-//        // Primary rendering pass
-//        auto framebufferCache = DependencyManager::get<FramebufferCache>();
-//        finalFramebufferSize = framebufferCache->getFrameBufferSize();
-//        // Final framebuffer that will be handled to the display-plugin
-//        finalFramebuffer = framebufferCache->getFramebuffer();
-//    }
-//
-//    {
-//        if (isStereo) {
-//            renderArgs._context->enableStereo(true);
-//            renderArgs._context->setStereoProjections(stereoEyeProjections);
-//            renderArgs._context->setStereoViews(stereoEyeOffsets);
-//        }
-//
-//        renderArgs._hudOperator = displayPlugin->getHUDOperator();
-//        renderArgs._hudTexture = _applicationOverlay.getOverlayTexture();
-//        renderArgs._blitFramebuffer = finalFramebuffer;
-//        _graphicsEngine.render_runRenderFrame(&renderArgs);
-//    }
-//
-//    auto frame = _graphicsEngine.getGPUContext()->endFrame();
-//    frame->frameIndex = _renderFrameCount;
-//    frame->framebuffer = finalFramebuffer;
-//    frame->framebufferRecycler = [](const gpu::FramebufferPointer& framebuffer) {
-//        auto frameBufferCache = DependencyManager::get<FramebufferCache>();
-//        if (frameBufferCache) {
-//            frameBufferCache->releaseFramebuffer(framebuffer);
-//        }
-//    };
-//    // deliver final scene rendering commands to the display plugin
-//    {
-//        PROFILE_RANGE(render, "/pluginOutput");
-//        PerformanceTimer perfTimer("pluginOutput");
-//        _renderLoopCounter.increment();
-//        displayPlugin->submitFrame(frame);
-//    }
-//
-//    // Reset the framebuffer and stereo state
-//    renderArgs._blitFramebuffer.reset();
-//    renderArgs._context->enableStereo(false);
-//
-//    {
-//        Stats::getInstance()->setRenderDetails(renderArgs._details);
-//    }
-//
-//    uint64_t lastPaintDuration = usecTimestampNow() - lastPaintBegin;
-//    _frameTimingsScriptingInterface.addValue(lastPaintDuration);
-//}
-
-
-// WorldBox Render Data & rendering functions
-//
-//class WorldBoxRenderData {
-//public:
-//    typedef render::Payload<WorldBoxRenderData> Payload;
-//    typedef Payload::DataPointer Pointer;
-//
-//    int _val = 0;
-//    static render::ItemID _item; // unique WorldBoxRenderData
-//};
-//
-//render::ItemID WorldBoxRenderData::_item{ render::Item::INVALID_ITEM_ID };
-//
-//namespace render {
-//    template <> const ItemKey payloadGetKey(const WorldBoxRenderData::Pointer& stuff) { return ItemKey::Builder::opaqueShape().withTagBits(ItemKey::TAG_BITS_0 | ItemKey::TAG_BITS_1); }
-//    template <> const Item::Bound payloadGetBound(const WorldBoxRenderData::Pointer& stuff) { return Item::Bound(); }
-//    template <> void payloadRender(const WorldBoxRenderData::Pointer& stuff, RenderArgs* args) {
-//        if (Menu::getInstance()->isOptionChecked(MenuOption::WorldAxes)) {
-//            PerformanceTimer perfTimer("worldBox");
-//
-//            auto& batch = *args->_batch;
-//            DependencyManager::get<GeometryCache>()->bindSimpleProgram(batch);
-//            renderWorldBox(args, batch);
-//        }
-//    }
-//}
-//
-//void Application::runRenderFrame(RenderArgs* renderArgs) {
-//    PROFILE_RANGE(render, __FUNCTION__);
-//    PerformanceTimer perfTimer("display");
-//    PerformanceWarning warn(Menu::getInstance()->isOptionChecked(MenuOption::PipelineWarnings), "Application::runRenderFrame()");
-//
-//    // The pending changes collecting the changes here
-//    render::Transaction transaction;
-//
-//    if (DependencyManager::get<SceneScriptingInterface>()->shouldRenderEntities()) {
-//        // render models...
-//        PerformanceTimer perfTimer("entities");
-//        PerformanceWarning warn(Menu::getInstance()->isOptionChecked(MenuOption::PipelineWarnings),
-//            "Application::runRenderFrame() ... entities...");
-//
-//        RenderArgs::DebugFlags renderDebugFlags = RenderArgs::RENDER_DEBUG_NONE;
-//
-//        renderArgs->_debugFlags = renderDebugFlags;
-//    }
-//
-//    // Make sure the WorldBox is in the scene
-//    // For the record, this one RenderItem is the first one we created and added to the scene.
-//    // We could move that code elsewhere but you know...
-//    if (!render::Item::isValidID(WorldBoxRenderData::_item)) {
-//        auto worldBoxRenderData = std::make_shared<WorldBoxRenderData>();
-//        auto worldBoxRenderPayload = std::make_shared<WorldBoxRenderData::Payload>(worldBoxRenderData);
-//
-//        WorldBoxRenderData::_item = _main3DScene->allocateID();
-//
-//        transaction.resetItem(WorldBoxRenderData::_item, worldBoxRenderPayload);
-//        _main3DScene->enqueueTransaction(transaction);
-//    }
-//
-//    {
-//        PerformanceTimer perfTimer("EngineRun");
-//        _renderEngine->getRenderContext()->args = renderArgs;
-//        _renderEngine->run();
-//    }
-//}
-
diff --git a/interface/src/graphics/GraphicsEngine.cpp b/interface/src/graphics/GraphicsEngine.cpp
index aecaa74d12..36bf3a1b97 100644
--- a/interface/src/graphics/GraphicsEngine.cpp
+++ b/interface/src/graphics/GraphicsEngine.cpp
@@ -34,6 +34,8 @@
 #include "Application.h"
 
 GraphicsEngine::GraphicsEngine() {
+    const QString SPLASH_SKYBOX { "{\"ProceduralEntity\":{ \"version\":2, \"shaderUrl\":\"qrc:///shaders/splashSkybox.frag\" } }" };
+    _splashScreen->parse(SPLASH_SKYBOX);
 }
 
 GraphicsEngine::~GraphicsEngine() {
@@ -54,6 +56,10 @@ void GraphicsEngine::initializeGPU(GLWidget* glwidget) {
     glwidget->makeCurrent();
     _gpuContext = std::make_shared<gpu::Context>();
 
+    _gpuContext->pushProgramsToSync(shader::allPrograms(), [this] {
+        _programsCompiled.store(true);
+    }, 1);
+
     DependencyManager::get<TextureCache>()->setGPUContext(_gpuContext);
 }
 
@@ -122,11 +128,7 @@ void GraphicsEngine::render_runRenderFrame(RenderArgs* renderArgs) {
 static const unsigned int THROTTLED_SIM_FRAMERATE = 15;
 static const int THROTTLED_SIM_FRAME_PERIOD_MS = MSECS_PER_SECOND / THROTTLED_SIM_FRAMERATE;
 
-
-
-
 bool GraphicsEngine::shouldPaint() const {
-
     auto displayPlugin = qApp->getActiveDisplayPlugin();
 
 #ifdef DEBUG_PAINT_DELAY
@@ -145,7 +147,7 @@ bool GraphicsEngine::shouldPaint() const {
 
     // Throttle if requested
     //if (displayPlugin->isThrottled() && (_graphicsEngine._renderEventHandler->_lastTimeRendered.elapsed() < THROTTLED_SIM_FRAME_PERIOD_MS)) {
-    if (    displayPlugin->isThrottled() &&
+    if (displayPlugin->isThrottled() &&
             (static_cast<RenderEventHandler*>(_renderEventHandler)->_lastTimeRendered.elapsed() < THROTTLED_SIM_FRAME_PERIOD_MS)) {
         return false;
     }
@@ -158,8 +160,6 @@ bool GraphicsEngine::checkPendingRenderEvent() {
     return (_renderEventHandler && static_cast<RenderEventHandler*>(_renderEventHandler)->_pendingRenderEvent.compare_exchange_strong(expected, true));
 }
 
-
-
 void GraphicsEngine::render_performFrame() {
     // Some plugins process message events, allowing paintGL to be called reentrantly.
 
@@ -189,6 +189,7 @@ void GraphicsEngine::render_performFrame() {
     glm::mat4  HMDSensorPose;
     glm::mat4  eyeToWorld;
     glm::mat4  sensorToWorld;
+    ViewFrustum viewFrustum;
 
     bool isStereo;
     glm::mat4  stereoEyeOffsets[2];
@@ -211,6 +212,7 @@ void GraphicsEngine::render_performFrame() {
             stereoEyeOffsets[eye] = _appRenderArgs._eyeOffsets[eye];
             stereoEyeProjections[eye] = _appRenderArgs._eyeProjections[eye];
         });
+        viewFrustum = _appRenderArgs._renderArgs.getViewFrustum();
     }
 
     {
@@ -221,21 +223,12 @@ void GraphicsEngine::render_performFrame() {
         gpu::doInBatch("Application_render::gpuContextReset", getGPUContext(), [&](gpu::Batch& batch) {
             batch.resetStages();
         });
-    }
 
-
-    {
-        PROFILE_RANGE(render, "/renderOverlay");
-        PerformanceTimer perfTimer("renderOverlay");
-        // NOTE: There is no batch associated with this renderArgs
-        // the ApplicationOverlay class assumes it's viewport is setup to be the device size
-        renderArgs._viewport = glm::ivec4(0, 0, qApp->getDeviceSize());
-        qApp->getApplicationOverlay().renderOverlay(&renderArgs);
-    }
-
-    {
-        PROFILE_RANGE(render, "/updateCompositor");
-        qApp->getApplicationCompositor().setFrameInfo(_renderFrameCount, eyeToWorld, sensorToWorld);
+        if (isStereo) {
+            renderArgs._context->enableStereo(true);
+            renderArgs._context->setStereoProjections(stereoEyeProjections);
+            renderArgs._context->setStereoViews(stereoEyeOffsets);
+        }
     }
 
     gpu::FramebufferPointer finalFramebuffer;
@@ -245,21 +238,40 @@ void GraphicsEngine::render_performFrame() {
         // Primary rendering pass
         auto framebufferCache = DependencyManager::get<FramebufferCache>();
         finalFramebufferSize = framebufferCache->getFrameBufferSize();
-        // Final framebuffer that will be handled to the display-plugin
+        // Final framebuffer that will be handed to the display-plugin
         finalFramebuffer = framebufferCache->getFramebuffer();
     }
 
-    {
-        if (isStereo) {
-            renderArgs._context->enableStereo(true);
-            renderArgs._context->setStereoProjections(stereoEyeProjections);
-            renderArgs._context->setStereoViews(stereoEyeOffsets);
+    if (!_programsCompiled.load()) {
+        gpu::doInBatch("splashFrame", _gpuContext, [&](gpu::Batch& batch) {
+            batch.setFramebuffer(finalFramebuffer);
+            batch.enableSkybox(true);
+            batch.enableStereo(isStereo);
+            batch.setViewportTransform({ 0, 0, finalFramebuffer->getSize() });
+            _splashScreen->render(batch, viewFrustum);
+        });
+    } else {
+        {
+            PROFILE_RANGE(render, "/renderOverlay");
+            PerformanceTimer perfTimer("renderOverlay");
+            // NOTE: There is no batch associated with this renderArgs
+            // the ApplicationOverlay class assumes it's viewport is setup to be the device size
+            renderArgs._viewport = glm::ivec4(0, 0, qApp->getDeviceSize());
+            qApp->getApplicationOverlay().renderOverlay(&renderArgs);
         }
 
-        renderArgs._hudOperator = displayPlugin->getHUDOperator();
-        renderArgs._hudTexture = qApp->getApplicationOverlay().getOverlayTexture();
-        renderArgs._blitFramebuffer = finalFramebuffer;
-        render_runRenderFrame(&renderArgs);
+        {
+            PROFILE_RANGE(render, "/updateCompositor");
+            qApp->getApplicationCompositor().setFrameInfo(_renderFrameCount, eyeToWorld, sensorToWorld);
+        }
+
+        {
+            PROFILE_RANGE(render, "/runRenderFrame");
+            renderArgs._hudOperator = displayPlugin->getHUDOperator();
+            renderArgs._hudTexture = qApp->getApplicationOverlay().getOverlayTexture();
+            renderArgs._blitFramebuffer = finalFramebuffer;
+            render_runRenderFrame(&renderArgs);
+        }
     }
 
     auto frame = getGPUContext()->endFrame();
@@ -283,18 +295,19 @@ void GraphicsEngine::render_performFrame() {
     renderArgs._blitFramebuffer.reset();
     renderArgs._context->enableStereo(false);
 
+#if !defined(DISABLE_QML)
     {
         auto stats = Stats::getInstance();
         if (stats) {
             stats->setRenderDetails(renderArgs._details);
         }
     }
+#endif
 
     uint64_t lastPaintDuration = usecTimestampNow() - lastPaintBegin;
     _frameTimingsScriptingInterface.addValue(lastPaintDuration);
 }
 
-
 void GraphicsEngine::editRenderArgs(RenderArgsEditor editor) {
     QMutexLocker renderLocker(&_renderArgsMutex);
     editor(_appRenderArgs);
diff --git a/interface/src/graphics/GraphicsEngine.h b/interface/src/graphics/GraphicsEngine.h
index 490f5312b5..83e774a64f 100644
--- a/interface/src/graphics/GraphicsEngine.h
+++ b/interface/src/graphics/GraphicsEngine.h
@@ -15,6 +15,7 @@
 #include <qmutex.h>
 
 #include <render/Engine.h>
+#include <procedural/ProceduralSkybox.h>
 
 #include <OctreeConstants.h>
 #include <shared/RateCounter.h>
@@ -84,6 +85,9 @@ protected:
 
     FrameTimingsScriptingInterface _frameTimingsScriptingInterface;
 
+    std::shared_ptr<ProceduralSkybox> _splashScreen { std::make_shared<ProceduralSkybox>() };
+    std::atomic<bool> _programsCompiled { false };
+
     friend class Application;
 };
 
diff --git a/libraries/animation/src/AnimSkeleton.cpp b/libraries/animation/src/AnimSkeleton.cpp
index 91ca2359b4..16c2c1cc7e 100644
--- a/libraries/animation/src/AnimSkeleton.cpp
+++ b/libraries/animation/src/AnimSkeleton.cpp
@@ -327,7 +327,7 @@ std::vector<int> AnimSkeleton::lookUpJointIndices(const std::vector<QString>& jo
     for (auto& name : jointNames) {
         int index = nameToJointIndex(name);
         if (index == -1) {
-            qWarning(animation) << "AnimSkeleton::lookUpJointIndices(): could not find bone with named " << name;
+            qWarning(animation) << "AnimSkeleton::lookUpJointIndices(): could not find bone with name " << name;
         }
         result.push_back(index);
     }
diff --git a/libraries/avatars/src/AvatarData.cpp b/libraries/avatars/src/AvatarData.cpp
index 92fa21758d..b6c7954f67 100644
--- a/libraries/avatars/src/AvatarData.cpp
+++ b/libraries/avatars/src/AvatarData.cpp
@@ -1776,16 +1776,11 @@ int AvatarData::getFauxJointIndex(const QString& name) const {
 
 int AvatarData::getJointIndex(const QString& name) const {
     int result = getFauxJointIndex(name);
-    if (result != -1) {
-        return result;
-    }
-    QReadLocker readLock(&_jointDataLock);
-    return _fstJointIndices.value(name) - 1;
+    return result;
 }
 
 QStringList AvatarData::getJointNames() const {
-    QReadLocker readLock(&_jointDataLock);
-    return _fstJointNames;
+    return QStringList();
 }
 
 glm::quat AvatarData::getOrientationOutbound() const {
@@ -2000,8 +1995,6 @@ void AvatarData::setSkeletonModelURL(const QUrl& skeletonModelURL) {
     
     _skeletonModelURL = expanded;
 
-    updateJointMappings();
-
     if (_clientTraitsHandler) {
         _clientTraitsHandler->markTraitUpdated(AvatarTraits::SkeletonModelURL);
     }
@@ -2097,58 +2090,6 @@ void AvatarData::detachAll(const QString& modelURL, const QString& jointName) {
     setAttachmentData(attachmentData);
 }
 
-void AvatarData::setJointMappingsFromNetworkReply() {
-
-    QNetworkReply* networkReply = static_cast<QNetworkReply*>(sender());
-
-    // before we process this update, make sure that the skeleton model URL hasn't changed
-    // since we made the FST request
-    if (networkReply->error() != QNetworkReply::NoError || networkReply->url() != _skeletonModelURL) {
-        qCDebug(avatars) << "Refusing to set joint mappings for FST URL that does not match the current URL";
-        networkReply->deleteLater();
-        return;
-    }
-
-    {
-        QWriteLocker writeLock(&_jointDataLock);
-        QByteArray line;
-        while (!(line = networkReply->readLine()).isEmpty()) {
-            line = line.trimmed();
-            if (line.startsWith("filename")) {
-                int filenameIndex = line.indexOf('=') + 1;
-                    if (filenameIndex > 0) {
-                        _skeletonFBXURL = _skeletonModelURL.resolved(QString(line.mid(filenameIndex).trimmed()));
-                    }
-                }
-            if (!line.startsWith("jointIndex")) {
-                continue;
-            }
-            int jointNameIndex = line.indexOf('=') + 1;
-            if (jointNameIndex == 0) {
-                continue;
-            }
-            int secondSeparatorIndex = line.indexOf('=', jointNameIndex);
-            if (secondSeparatorIndex == -1) {
-                continue;
-            }
-            QString jointName = line.mid(jointNameIndex, secondSeparatorIndex - jointNameIndex).trimmed();
-            bool ok;
-            int jointIndex = line.mid(secondSeparatorIndex + 1).trimmed().toInt(&ok);
-            if (ok) {
-                while (_fstJointNames.size() < jointIndex + 1) {
-                    _fstJointNames.append(QString());
-                }
-                _fstJointNames[jointIndex] = jointName;
-            }
-        }
-        for (int i = 0; i < _fstJointNames.size(); i++) {
-            _fstJointIndices.insert(_fstJointNames.at(i), i + 1);
-        }
-    }
-
-    networkReply->deleteLater();
-}
-
 void AvatarData::sendAvatarDataPacket(bool sendAll) {
     auto nodeList = DependencyManager::get<NodeList>();
 
@@ -2210,34 +2151,6 @@ void AvatarData::sendIdentityPacket() {
     _identityDataChanged = false;
 }
 
-void AvatarData::updateJointMappings() {
-    {
-        QWriteLocker writeLock(&_jointDataLock);
-        _fstJointIndices.clear();
-        _fstJointNames.clear();
-        _jointData.clear();
-    }
-
-    if (_skeletonModelURL.fileName().toLower().endsWith(".fst")) {
-        ////
-        // TODO: Should we rely upon HTTPResourceRequest for ResourceRequestObserver instead?
-        // HTTPResourceRequest::doSend() covers all of the following and
-        // then some. It doesn't cover the connect() call, so we may
-        // want to add a HTTPResourceRequest::doSend() method that does
-        // connects.
-        QNetworkAccessManager& networkAccessManager = NetworkAccessManager::getInstance();
-        QNetworkRequest networkRequest = QNetworkRequest(_skeletonModelURL);
-        networkRequest.setAttribute(QNetworkRequest::FollowRedirectsAttribute, true);
-        networkRequest.setHeader(QNetworkRequest::UserAgentHeader, HIGH_FIDELITY_USER_AGENT);
-        DependencyManager::get<ResourceRequestObserver>()->update(
-            _skeletonModelURL, -1, "AvatarData::updateJointMappings");
-        QNetworkReply* networkReply = networkAccessManager.get(networkRequest);
-        //
-        ////
-        connect(networkReply, &QNetworkReply::finished, this, &AvatarData::setJointMappingsFromNetworkReply);
-    }
-}
-
 static const QString JSON_ATTACHMENT_URL = QStringLiteral("modelUrl");
 static const QString JSON_ATTACHMENT_JOINT_NAME = QStringLiteral("jointName");
 static const QString JSON_ATTACHMENT_TRANSFORM = QStringLiteral("transform");
diff --git a/libraries/avatars/src/AvatarData.h b/libraries/avatars/src/AvatarData.h
index 7d88cab209..71e79191bc 100644
--- a/libraries/avatars/src/AvatarData.h
+++ b/libraries/avatars/src/AvatarData.h
@@ -1269,11 +1269,6 @@ public slots:
      */
     void sendIdentityPacket();
 
-    /**jsdoc
-     * @function MyAvatar.setJointMappingsFromNetworkReply
-     */
-    void setJointMappingsFromNetworkReply();
-
     /**jsdoc
      * @function MyAvatar.setSessionUUID
      * @param {Uuid} sessionUUID
@@ -1376,23 +1371,16 @@ protected:
     mutable HeadData* _headData { nullptr };
 
     QUrl _skeletonModelURL;
-    QUrl _skeletonFBXURL;
     QVector<AttachmentData> _attachmentData;
     QVector<AttachmentData> _oldAttachmentData;
     QString _displayName;
     QString _sessionDisplayName { };
     bool _lookAtSnappingEnabled { true };
 
-    QHash<QString, int> _fstJointIndices; ///< 1-based, since zero is returned for missing keys
-    QStringList _fstJointNames; ///< in order of depth-first traversal
-
     quint64 _errorLogExpiry; ///< time in future when to log an error
 
     QWeakPointer<Node> _owningAvatarMixer;
 
-    /// Loads the joint indices, names from the FST file (if any)
-    virtual void updateJointMappings();
-
     glm::vec3 _targetVelocity;
 
     SimpleMovingAverage _averageBytesReceived;
@@ -1496,11 +1484,8 @@ protected:
     T readLockWithNamedJointIndex(const QString& name, const T& defaultValue, F f) const {
         int index = getFauxJointIndex(name);
         QReadLocker readLock(&_jointDataLock);
-        if (index == -1) {
-            index = _fstJointIndices.value(name) - 1;
-        }
 
-        // The first conditional is superfluous, but illsutrative
+        // The first conditional is superfluous, but illustrative
         if (index == -1 || index < _jointData.size()) {
             return defaultValue;
         }
@@ -1517,9 +1502,6 @@ protected:
     void writeLockWithNamedJointIndex(const QString& name, F f) {
         int index = getFauxJointIndex(name);
         QWriteLocker writeLock(&_jointDataLock);
-        if (index == -1) {
-            index = _fstJointIndices.value(name) - 1;
-        }
         if (index == -1) {
             return;
         }
diff --git a/libraries/avatars/src/ClientTraitsHandler.cpp b/libraries/avatars/src/ClientTraitsHandler.cpp
index cbc8e93745..3e24c1f9ad 100644
--- a/libraries/avatars/src/ClientTraitsHandler.cpp
+++ b/libraries/avatars/src/ClientTraitsHandler.cpp
@@ -104,7 +104,7 @@ void ClientTraitsHandler::sendChangedTraitsToMixer() {
             // we double check that it is a simple iterator here
             auto traitType = static_cast<AvatarTraits::TraitType>(std::distance(traitStatusesCopy.simpleCBegin(), simpleIt));
 
-            if (_shouldPerformInitialSend || *simpleIt == Updated) {
+            if (initialSend || *simpleIt == Updated) {
                 if (traitType == AvatarTraits::SkeletonModelURL) {
                     _owningAvatar->packTrait(traitType, *traitsPacketList);
 
diff --git a/libraries/display-plugins/src/display-plugins/OpenGLDisplayPlugin.cpp b/libraries/display-plugins/src/display-plugins/OpenGLDisplayPlugin.cpp
index 2d19a745e1..5835316efe 100644
--- a/libraries/display-plugins/src/display-plugins/OpenGLDisplayPlugin.cpp
+++ b/libraries/display-plugins/src/display-plugins/OpenGLDisplayPlugin.cpp
@@ -525,6 +525,9 @@ void OpenGLDisplayPlugin::updateFrameData() {
         if (_newFrameQueue.size() > 1) {
             _droppedFrameRate.increment(_newFrameQueue.size() - 1);
         }
+
+        _gpuContext->processProgramsToSync();
+
         while (!_newFrameQueue.empty()) {
             _currentFrame = _newFrameQueue.front();
             _newFrameQueue.pop();
@@ -645,6 +648,7 @@ void OpenGLDisplayPlugin::present() {
     auto frameId = (uint64_t)presentCount();
     PROFILE_RANGE_EX(render, __FUNCTION__, 0xffffff00, frameId)
     uint64_t startPresent = usecTimestampNow();
+
     {
         PROFILE_RANGE_EX(render, "updateFrameData", 0xff00ff00, frameId)
         updateFrameData();
@@ -837,7 +841,6 @@ void OpenGLDisplayPlugin::render(std::function<void(gpu::Batch& batch)> f) {
     _gpuContext->executeBatch(batch);
 }
 
-
 OpenGLDisplayPlugin::~OpenGLDisplayPlugin() {
 }
 
diff --git a/libraries/fbx/src/FBXSerializer.cpp b/libraries/fbx/src/FBXSerializer.cpp
index a9887cde15..67220342b8 100644
--- a/libraries/fbx/src/FBXSerializer.cpp
+++ b/libraries/fbx/src/FBXSerializer.cpp
@@ -417,6 +417,19 @@ QByteArray fileOnUrl(const QByteArray& filepath, const QString& url) {
     return filepath.mid(filepath.lastIndexOf('/') + 1);
 }
 
+QMap<QString, QString> getJointNameMapping(const QVariantHash& mapping) {
+    static const QString JOINT_NAME_MAPPING_FIELD = "jointMap";
+    QMap<QString, QString> hfmToHifiJointNameMap;
+    if (!mapping.isEmpty() && mapping.contains(JOINT_NAME_MAPPING_FIELD) && mapping[JOINT_NAME_MAPPING_FIELD].type() == QVariant::Hash) {
+        auto jointNames = mapping[JOINT_NAME_MAPPING_FIELD].toHash();
+        for (auto itr = jointNames.begin(); itr != jointNames.end(); itr++) {
+            hfmToHifiJointNameMap.insert(itr.key(), itr.value().toString());
+            qCDebug(modelformat) << "the mapped key " << itr.key() << " has a value of " << hfmToHifiJointNameMap[itr.key()];
+        }
+    }
+    return hfmToHifiJointNameMap;
+}
+
 QMap<QString, glm::quat> getJointRotationOffsets(const QVariantHash& mapping) {
     QMap<QString, glm::quat> jointRotationOffsets;
     static const QString JOINT_ROTATION_OFFSET_FIELD = "jointRotationOffset";
@@ -465,14 +478,14 @@ HFMModel* FBXSerializer::extractHFMModel(const QVariantHash& mapping, const QStr
     std::map<QString, HFMLight> lights;
 
     QVariantHash joints = mapping.value("joint").toHash();
-    QString jointEyeLeftName = processID(getString(joints.value("jointEyeLeft", "jointEyeLeft")));
-    QString jointEyeRightName = processID(getString(joints.value("jointEyeRight", "jointEyeRight")));
-    QString jointNeckName = processID(getString(joints.value("jointNeck", "jointNeck")));
-    QString jointRootName = processID(getString(joints.value("jointRoot", "jointRoot")));
-    QString jointLeanName = processID(getString(joints.value("jointLean", "jointLean")));
-    QString jointHeadName = processID(getString(joints.value("jointHead", "jointHead")));
-    QString jointLeftHandName = processID(getString(joints.value("jointLeftHand", "jointLeftHand")));
-    QString jointRightHandName = processID(getString(joints.value("jointRightHand", "jointRightHand")));
+    QString jointEyeLeftName = "EyeLeft";
+    QString jointEyeRightName = "EyeRight";
+    QString jointNeckName = "Neck";
+    QString jointRootName = "Hips";
+    QString jointLeanName = "Spine";
+    QString jointHeadName = "Head";
+    QString jointLeftHandName = "LeftHand";
+    QString jointRightHandName = "RightHand";
     QString jointEyeLeftID;
     QString jointEyeRightID;
     QString jointNeckID;
@@ -519,6 +532,8 @@ HFMModel* FBXSerializer::extractHFMModel(const QVariantHash& mapping, const QStr
     HFMModel& hfmModel = *hfmModelPtr;
 
     hfmModel.originalURL = url;
+    hfmModel.hfmToHifiJointNameMapping.clear();
+    hfmModel.hfmToHifiJointNameMapping = getJointNameMapping(mapping);
 
     float unitScaleFactor = 1.0f;
     glm::vec3 ambientColor;
@@ -587,34 +602,34 @@ HFMModel* FBXSerializer::extractHFMModel(const QVariantHash& mapping, const QStr
                         hifiGlobalNodeID = id;
                     }
 
-                    if (name == jointEyeLeftName || name == "EyeL" || name == "joint_Leye") {
+                    if (name == jointEyeLeftName || name == "EyeL" || name == "joint_Leye" || (hfmModel.hfmToHifiJointNameMapping.contains(jointEyeLeftName) && (name == hfmModel.hfmToHifiJointNameMapping[jointEyeLeftName]))) {
                         jointEyeLeftID = getID(object.properties);
 
-                    } else if (name == jointEyeRightName || name == "EyeR" || name == "joint_Reye") {
+                    } else if (name == jointEyeRightName || name == "EyeR" || name == "joint_Reye" || (hfmModel.hfmToHifiJointNameMapping.contains(jointEyeRightName) && (name == hfmModel.hfmToHifiJointNameMapping[jointEyeRightName]))) {
                         jointEyeRightID = getID(object.properties);
 
-                    } else if (name == jointNeckName || name == "NeckRot" || name == "joint_neck") {
+                    } else if (name == jointNeckName || name == "NeckRot" || name == "joint_neck" || (hfmModel.hfmToHifiJointNameMapping.contains(jointNeckName) && (name == hfmModel.hfmToHifiJointNameMapping[jointNeckName]))) {
                         jointNeckID = getID(object.properties);
 
-                    } else if (name == jointRootName) {
+                    } else if (name == jointRootName || (hfmModel.hfmToHifiJointNameMapping.contains(jointRootName) && (name == hfmModel.hfmToHifiJointNameMapping[jointRootName]))) {
                         jointRootID = getID(object.properties);
 
-                    } else if (name == jointLeanName) {
+                    } else if (name == jointLeanName || (hfmModel.hfmToHifiJointNameMapping.contains(jointLeanName) && (name == hfmModel.hfmToHifiJointNameMapping[jointLeanName]))) {
                         jointLeanID = getID(object.properties);
 
-                    } else if (name == jointHeadName) {
+                    } else if ((name == jointHeadName) || (hfmModel.hfmToHifiJointNameMapping.contains(jointHeadName) && (name == hfmModel.hfmToHifiJointNameMapping[jointHeadName]))) {
                         jointHeadID = getID(object.properties);
 
-                    } else if (name == jointLeftHandName || name == "LeftHand" || name == "joint_L_hand") {
+                    } else if (name == jointLeftHandName || name == "LeftHand" || name == "joint_L_hand" || (hfmModel.hfmToHifiJointNameMapping.contains(jointLeftHandName) && (name == hfmModel.hfmToHifiJointNameMapping[jointLeftHandName]))) {
                         jointLeftHandID = getID(object.properties);
 
-                    } else if (name == jointRightHandName || name == "RightHand" || name == "joint_R_hand") {
+                    } else if (name == jointRightHandName || name == "RightHand" || name == "joint_R_hand" || (hfmModel.hfmToHifiJointNameMapping.contains(jointRightHandName) && (name == hfmModel.hfmToHifiJointNameMapping[jointRightHandName]))) {
                         jointRightHandID = getID(object.properties);
 
-                    } else if (name == "LeftToe" || name == "joint_L_toe" || name == "LeftToe_End") {
+                    } else if (name == "LeftToe" || name == "joint_L_toe" || name == "LeftToe_End" || (hfmModel.hfmToHifiJointNameMapping.contains("LeftToe") && (name == hfmModel.hfmToHifiJointNameMapping["LeftToe"]))) {
                         jointLeftToeID = getID(object.properties);
 
-                    } else if (name == "RightToe" || name == "joint_R_toe" || name == "RightToe_End") {
+                    } else if (name == "RightToe" || name == "joint_R_toe" || name == "RightToe_End" || (hfmModel.hfmToHifiJointNameMapping.contains("RightToe") && (name == hfmModel.hfmToHifiJointNameMapping["RightToe"]))) {
                         jointRightToeID = getID(object.properties);
                     }
 
@@ -1388,6 +1403,9 @@ HFMModel* FBXSerializer::extractHFMModel(const QVariantHash& mapping, const QStr
         }
         joint.inverseBindRotation = joint.inverseDefaultRotation;
         joint.name = fbxModel.name;
+        if (hfmModel.hfmToHifiJointNameMapping.contains(hfmModel.hfmToHifiJointNameMapping.key(joint.name))) {
+            joint.name = hfmModel.hfmToHifiJointNameMapping.key(fbxModel.name);
+        }
 
         foreach (const QString& childID, _connectionChildMap.values(modelID)) {
             QString type = typeFlags.value(childID);
@@ -1400,7 +1418,7 @@ HFMModel* FBXSerializer::extractHFMModel(const QVariantHash& mapping, const QStr
         joint.bindTransformFoundInCluster = false;
 
         hfmModel.joints.append(joint);
-        hfmModel.jointIndices.insert(fbxModel.name, hfmModel.joints.size());
+        hfmModel.jointIndices.insert(joint.name, hfmModel.joints.size());
 
         QString rotationID = localRotations.value(modelID);
         AnimationCurve xRotCurve = animationCurves.value(xComponents.value(rotationID));
@@ -1824,6 +1842,9 @@ HFMModel* FBXSerializer::extractHFMModel(const QVariantHash& mapping, const QStr
         QString jointName = itr.key();
         glm::quat rotationOffset = itr.value();
         int jointIndex = hfmModel.getJointIndex(jointName);
+        if (hfmModel.hfmToHifiJointNameMapping.contains(jointName)) {
+            jointIndex = hfmModel.getJointIndex(jointName);
+        }
         if (jointIndex != -1) {
             hfmModel.jointRotationOffsets.insert(jointIndex, rotationOffset);
         }
diff --git a/libraries/fbx/src/FSTReader.h b/libraries/fbx/src/FSTReader.h
index 4a8574f0cf..00244877b3 100644
--- a/libraries/fbx/src/FSTReader.h
+++ b/libraries/fbx/src/FSTReader.h
@@ -29,6 +29,7 @@ static const QString JOINT_FIELD = "joint";
 static const QString FREE_JOINT_FIELD = "freeJoint";
 static const QString BLENDSHAPE_FIELD = "bs";
 static const QString SCRIPT_FIELD = "script";
+static const QString JOINT_NAME_MAPPING_FIELD = "jointMap";
 
 class FSTReader {
 public:
diff --git a/libraries/gpu-gl-common/src/gpu/gl/GLBackend.cpp b/libraries/gpu-gl-common/src/gpu/gl/GLBackend.cpp
index c1ce05c18b..295b9becb8 100644
--- a/libraries/gpu-gl-common/src/gpu/gl/GLBackend.cpp
+++ b/libraries/gpu-gl-common/src/gpu/gl/GLBackend.cpp
@@ -859,3 +859,7 @@ void GLBackend::setCameraCorrection(const Mat4& correction, const Mat4& prevRend
     _pipeline._cameraCorrectionBuffer._buffer->setSubData(0, _transform._correction);
     _pipeline._cameraCorrectionBuffer._buffer->flush();
 }
+
+void GLBackend::syncProgram(const gpu::ShaderPointer& program) {
+    gpu::gl::GLShader::sync(*this, *program);
+}
\ No newline at end of file
diff --git a/libraries/gpu-gl-common/src/gpu/gl/GLBackend.h b/libraries/gpu-gl-common/src/gpu/gl/GLBackend.h
index 37dde5b08e..07f7df9277 100644
--- a/libraries/gpu-gl-common/src/gpu/gl/GLBackend.h
+++ b/libraries/gpu-gl-common/src/gpu/gl/GLBackend.h
@@ -249,6 +249,8 @@ public:
     // Let's try to avoid to do that as much as possible!
     void syncCache() final override;
 
+    void syncProgram(const gpu::ShaderPointer& program) override;
+
     // This is the ugly "download the pixels to sysmem for taking a snapshot"
     // Just avoid using it, it's ugly and will break performances
     virtual void downloadFramebuffer(const FramebufferPointer& srcFramebuffer,
diff --git a/libraries/gpu-gl-common/src/gpu/gl/GLShader.cpp b/libraries/gpu-gl-common/src/gpu/gl/GLShader.cpp
index 44d2bd6ca0..cf123a3f66 100644
--- a/libraries/gpu-gl-common/src/gpu/gl/GLShader.cpp
+++ b/libraries/gpu-gl-common/src/gpu/gl/GLShader.cpp
@@ -37,6 +37,7 @@ GLShader* GLShader::sync(GLBackend& backend, const Shader& shader, const Shader:
     if (object) {
         return object;
     }
+    PROFILE_RANGE(render, "/GLShader::sync");
     // need to have a gpu object?
     if (shader.isProgram()) {
         GLShader* tempObject = backend.compileBackendProgram(shader, handler);
diff --git a/libraries/gpu/src/gpu/Batch.cpp b/libraries/gpu/src/gpu/Batch.cpp
index 96b06ea6b0..cd7c7c881e 100644
--- a/libraries/gpu/src/gpu/Batch.cpp
+++ b/libraries/gpu/src/gpu/Batch.cpp
@@ -760,4 +760,4 @@ void Batch::flush() {
         }
         buffer->flush();
     }
-}
+}
\ No newline at end of file
diff --git a/libraries/gpu/src/gpu/Color.slh b/libraries/gpu/src/gpu/Color.slh
index 16eb7487ed..65ddc0b01e 100644
--- a/libraries/gpu/src/gpu/Color.slh
+++ b/libraries/gpu/src/gpu/Color.slh
@@ -18,8 +18,8 @@
 
 float color_scalar_sRGBToLinear(float value) {
     const float SRGB_ELBOW = 0.04045;
-    
-    return (value <= SRGB_ELBOW) ? value / 12.92 : pow((value + 0.055) / 1.055, 2.4);
+
+    return mix(pow((value + 0.055) / 1.055, 2.4), value / 12.92, float(value <= SRGB_ELBOW));
 }
 
 vec3 color_sRGBToLinear(vec3 srgb) {
diff --git a/libraries/gpu/src/gpu/Context.cpp b/libraries/gpu/src/gpu/Context.cpp
index 711059315e..610c3d1308 100644
--- a/libraries/gpu/src/gpu/Context.cpp
+++ b/libraries/gpu/src/gpu/Context.cpp
@@ -51,6 +51,7 @@ Context::~Context() {
         delete batch;
     }
     _batchPool.clear();
+    _syncedPrograms.clear();
 }
 
 void Context::shutdown() {
@@ -346,6 +347,40 @@ Size Context::getTextureResourceIdealGPUMemSize() {
     return Backend::textureResourceIdealGPUMemSize.getValue();
 }
 
+void Context::pushProgramsToSync(const std::vector<uint32_t>& programIDs, std::function<void()> callback, size_t rate) {
+    std::vector<gpu::ShaderPointer> programs;
+    for (auto programID : programIDs) {
+        programs.push_back(gpu::Shader::createProgram(programID));
+    }
+    pushProgramsToSync(programs, callback, rate);
+}
+
+void Context::pushProgramsToSync(const std::vector<gpu::ShaderPointer>& programs, std::function<void()> callback, size_t rate) {
+    Lock lock(_programsToSyncMutex);
+    _programsToSyncQueue.emplace(programs, callback, rate == 0 ? programs.size() : rate);
+}
+
+void Context::processProgramsToSync() {
+    if (!_programsToSyncQueue.empty()) {
+        Lock lock(_programsToSyncMutex);
+        ProgramsToSync programsToSync = _programsToSyncQueue.front();
+        size_t numSynced = 0;
+        while (_nextProgramToSyncIndex < programsToSync.programs.size() && numSynced < programsToSync.rate) {
+            auto nextProgram = programsToSync.programs.at(_nextProgramToSyncIndex);
+            _backend->syncProgram(nextProgram);
+            _syncedPrograms.push_back(nextProgram);
+            _nextProgramToSyncIndex++;
+            numSynced++;
+        }
+
+        if (_nextProgramToSyncIndex == programsToSync.programs.size()) {
+            programsToSync.callback();
+            _nextProgramToSyncIndex = 0;
+            _programsToSyncQueue.pop();
+        }
+    }
+}
+
 BatchPointer Context::acquireBatch(const char* name) {
     Batch* rawBatch = nullptr;
     {
diff --git a/libraries/gpu/src/gpu/Context.h b/libraries/gpu/src/gpu/Context.h
index 654a34fe91..0626ecd8f3 100644
--- a/libraries/gpu/src/gpu/Context.h
+++ b/libraries/gpu/src/gpu/Context.h
@@ -13,6 +13,7 @@
 
 #include <assert.h>
 #include <mutex>
+#include <queue>
 
 #include <GLMHelpers.h>
 
@@ -61,6 +62,7 @@ public:
 
     virtual void render(const Batch& batch) = 0;
     virtual void syncCache() = 0;
+    virtual void syncProgram(const gpu::ShaderPointer& program) = 0;
     virtual void recycle() const = 0;
     virtual void downloadFramebuffer(const FramebufferPointer& srcFramebuffer, const Vec4i& region, QImage& destImage) = 0;
 
@@ -247,6 +249,20 @@ public:
     static Size getTextureResourcePopulatedGPUMemSize();
     static Size getTextureResourceIdealGPUMemSize();
 
+    struct ProgramsToSync {
+        ProgramsToSync(const std::vector<gpu::ShaderPointer>& programs, std::function<void()> callback, size_t rate) :
+            programs(programs), callback(callback), rate(rate) {}
+
+        std::vector<gpu::ShaderPointer> programs;
+        std::function<void()> callback;
+        size_t rate;
+    };
+
+    void pushProgramsToSync(const std::vector<uint32_t>& programIDs, std::function<void()> callback, size_t rate = 0);
+    void pushProgramsToSync(const std::vector<gpu::ShaderPointer>& programs, std::function<void()> callback, size_t rate = 0);
+
+    void processProgramsToSync();
+
 protected:
     Context(const Context& context);
 
@@ -258,6 +274,11 @@ protected:
     RangeTimerPointer _frameRangeTimer;
     StereoState _stereo;
 
+    std::mutex _programsToSyncMutex;
+    std::queue<ProgramsToSync> _programsToSyncQueue;
+    gpu::Shaders _syncedPrograms;
+    size_t _nextProgramToSyncIndex { 0 };
+
     // Sampled at the end of every frame, the stats of all the counters
     mutable ContextStats _frameStats;
 
diff --git a/libraries/gpu/src/gpu/null/NullBackend.h b/libraries/gpu/src/gpu/null/NullBackend.h
index e227b631c7..f934bcf619 100644
--- a/libraries/gpu/src/gpu/null/NullBackend.h
+++ b/libraries/gpu/src/gpu/null/NullBackend.h
@@ -43,6 +43,8 @@ public:
     // Let's try to avoid to do that as much as possible!
     void syncCache() final { }
 
+    void syncProgram(const gpu::ShaderPointer& program) final {}
+
     // This is the ugly "download the pixels to sysmem for taking a snapshot"
     // Just avoid using it, it's ugly and will break performances
     virtual void downloadFramebuffer(const FramebufferPointer& srcFramebuffer, const Vec4i& region, QImage& destImage) final { }
diff --git a/libraries/hfm/src/hfm/HFM.h b/libraries/hfm/src/hfm/HFM.h
index 05e48b6534..de58d864b3 100644
--- a/libraries/hfm/src/hfm/HFM.h
+++ b/libraries/hfm/src/hfm/HFM.h
@@ -313,6 +313,7 @@ public:
     QList<QString> blendshapeChannelNames;
 
     QMap<int, glm::quat> jointRotationOffsets;
+    QMap<QString, QString> hfmToHifiJointNameMapping;
 };
 
 };
diff --git a/libraries/render-utils/src/simple_textured.slf b/libraries/render-utils/src/simple_textured.slf
index 9494edb890..dbc49fcb5d 100644
--- a/libraries/render-utils/src/simple_textured.slf
+++ b/libraries/render-utils/src/simple_textured.slf
@@ -29,7 +29,7 @@ layout(location=RENDER_UTILS_ATTR_TEXCOORD01) in vec4 _texCoord01;
 
 void main(void) {
     vec4 texel = texture(originalTexture, _texCoord0);
-    texel = mix(color_sRGBAToLinear(texel), texel, float(_color.a <= 0.0));
+    texel = mix(texel, color_sRGBAToLinear(texel), float(_color.a <= 0.0));
     texel.rgb *= _color.rgb;
 
     packDeferredFragment(
diff --git a/libraries/render-utils/src/simple_textured_fade.slf b/libraries/render-utils/src/simple_textured_fade.slf
index 5ca21a71ac..5a9eb0688e 100644
--- a/libraries/render-utils/src/simple_textured_fade.slf
+++ b/libraries/render-utils/src/simple_textured_fade.slf
@@ -41,9 +41,9 @@ void main(void) {
     applyFade(fadeParams, _positionWS.xyz, fadeEmissive);
     
     vec4 texel = texture(originalTexture, _texCoord0);
-    texel = mix(color_sRGBAToLinear(texel), texel, float(_color.a <= 0.0));
+    texel = mix(texel, color_sRGBAToLinear(texel), float(_color.a <= 0.0));
     texel.rgb *= _color.rgb;
-    texel.a = abs(_color.a);
+    texel.a *= abs(_color.a);
 
     const float ALPHA_THRESHOLD = 0.999;
     if (texel.a < ALPHA_THRESHOLD) {
diff --git a/libraries/render-utils/src/simple_textured_unlit.slf b/libraries/render-utils/src/simple_textured_unlit.slf
index 2d8f228f1c..475428f0ae 100644
--- a/libraries/render-utils/src/simple_textured_unlit.slf
+++ b/libraries/render-utils/src/simple_textured_unlit.slf
@@ -29,9 +29,9 @@ layout(location=RENDER_UTILS_ATTR_TEXCOORD01) in vec4 _texCoord01;
 
 void main(void) {
     vec4 texel = texture(originalTexture, _texCoord0);
-    texel = mix(color_sRGBAToLinear(texel), texel, float(_color.a <= 0.0));
+    texel = mix(texel, color_sRGBAToLinear(texel), float(_color.a <= 0.0));
     texel.rgb *= _color.rgb;
-    texel.a = abs(_color.a);
+    texel.a *= abs(_color.a);
 
     const float ALPHA_THRESHOLD = 0.999;
     if (texel.a < ALPHA_THRESHOLD) {
diff --git a/libraries/render-utils/src/simple_textured_unlit_fade.slf b/libraries/render-utils/src/simple_textured_unlit_fade.slf
index 442be14a8e..d0ba4c13fe 100644
--- a/libraries/render-utils/src/simple_textured_unlit_fade.slf
+++ b/libraries/render-utils/src/simple_textured_unlit_fade.slf
@@ -41,9 +41,9 @@ void main(void) {
     applyFade(fadeParams, _positionWS.xyz, fadeEmissive);
 
     vec4 texel = texture(originalTexture, _texCoord0);
-    texel = mix(color_sRGBAToLinear(texel), texel, float(_color.a <= 0.0));
+    texel = mix(texel, color_sRGBAToLinear(texel), float(_color.a <= 0.0));
     texel.rgb *= _color.rgb;
-    texel.a = abs(_color.a);
+    texel.a *= abs(_color.a);
 
     const float ALPHA_THRESHOLD = 0.999;
     if (texel.a < ALPHA_THRESHOLD) {
diff --git a/libraries/render-utils/src/simple_transparent_textured.slf b/libraries/render-utils/src/simple_transparent_textured.slf
index 1a9d14e2fa..bd29ff2ec9 100644
--- a/libraries/render-utils/src/simple_transparent_textured.slf
+++ b/libraries/render-utils/src/simple_transparent_textured.slf
@@ -29,7 +29,7 @@ layout(location=RENDER_UTILS_ATTR_TEXCOORD01) in vec4 _texCoord01;
 
 void main(void) {
     vec4 texel = texture(originalTexture, _texCoord0);
-    texel = mix(color_sRGBAToLinear(texel), texel, float(_color.a <= 0.0));
+    texel = mix(texel, color_sRGBAToLinear(texel), float(_color.a <= 0.0));
     texel.rgb *= _color.rgb;
     texel.a *= abs(_color.a);
 
diff --git a/libraries/render-utils/src/simple_transparent_textured_fade.slf b/libraries/render-utils/src/simple_transparent_textured_fade.slf
index 75a88dc581..d401989f90 100644
--- a/libraries/render-utils/src/simple_transparent_textured_fade.slf
+++ b/libraries/render-utils/src/simple_transparent_textured_fade.slf
@@ -47,7 +47,7 @@ void main(void) {
     applyFade(fadeParams, _positionWS.xyz, fadeEmissive);
 
     vec4 texel = texture(originalTexture, _texCoord0);
-    texel = mix(color_sRGBAToLinear(texel), texel, float(_color.a <= 0.0));
+    texel = mix(texel, color_sRGBAToLinear(texel), float(_color.a <= 0.0));
     texel.rgb *= _color.rgb;
     texel.a *= abs(_color.a);
 
diff --git a/libraries/render-utils/src/simple_transparent_textured_unlit.slf b/libraries/render-utils/src/simple_transparent_textured_unlit.slf
index 3f4abfc730..42a8270274 100644
--- a/libraries/render-utils/src/simple_transparent_textured_unlit.slf
+++ b/libraries/render-utils/src/simple_transparent_textured_unlit.slf
@@ -28,7 +28,7 @@ layout(location=0) out vec4 _fragColor0;
 
 void main(void) {
     vec4 texel = texture(originalTexture, _texCoord0);
-    texel = mix(color_sRGBAToLinear(texel), texel, float(_color.a <= 0.0));
+    texel = mix(texel, color_sRGBAToLinear(texel), float(_color.a <= 0.0));
     texel.rgb *= _color.rgb;
     texel.a *= abs(_color.a);
 
diff --git a/libraries/render-utils/src/simple_transparent_textured_unlit_fade.slf b/libraries/render-utils/src/simple_transparent_textured_unlit_fade.slf
index e46426ec7a..afc0c94575 100644
--- a/libraries/render-utils/src/simple_transparent_textured_unlit_fade.slf
+++ b/libraries/render-utils/src/simple_transparent_textured_unlit_fade.slf
@@ -40,7 +40,7 @@ void main(void) {
     applyFade(fadeParams, _positionWS.xyz, fadeEmissive);
 
     vec4 texel = texture(originalTexture, _texCoord0);
-    texel = mix(color_sRGBAToLinear(texel), texel, float(_color.a <= 0.0));
+    texel = mix(texel, color_sRGBAToLinear(texel), float(_color.a <= 0.0));
     texel.rgb *= _color.rgb;
     texel.a *= abs(_color.a);
 
diff --git a/libraries/script-engine/src/ScriptEngine.cpp b/libraries/script-engine/src/ScriptEngine.cpp
index 455fd93f4b..6f98dd2864 100644
--- a/libraries/script-engine/src/ScriptEngine.cpp
+++ b/libraries/script-engine/src/ScriptEngine.cpp
@@ -2061,68 +2061,6 @@ bool ScriptEngine::hasEntityScriptDetails(const EntityItemID& entityID) const {
     return _entityScripts.contains(entityID);
 }
 
-const static EntityItemID BAD_SCRIPT_UUID_PLACEHOLDER { "{20170224-dead-face-0000-cee000021114}" };
-
-void ScriptEngine::processDeferredEntityLoads(const QString& entityScript, const EntityItemID& leaderID) {
-    QList<DeferredLoadEntity> retryLoads;
-    QMutableListIterator<DeferredLoadEntity> i(_deferredEntityLoads);
-    while (i.hasNext()) {
-        auto retry = i.next();
-        if (retry.entityScript == entityScript) {
-            retryLoads << retry;
-            i.remove();
-        }
-    }
-    foreach(DeferredLoadEntity retry, retryLoads) {
-        // check whether entity was since been deleted
-
-        EntityScriptDetails details;
-        if (!getEntityScriptDetails(retry.entityID, details)) {
-            qCDebug(scriptengine) << "processDeferredEntityLoads -- entity details gone (entity deleted?)"
-                                  << retry.entityID;
-            continue;
-        }
-
-        // check whether entity has since been unloaded or otherwise errored-out
-        if (details.status != EntityScriptStatus::PENDING) {
-            qCDebug(scriptengine) << "processDeferredEntityLoads -- entity status no longer PENDING; "
-                                  << retry.entityID << details.status;
-            continue;
-        }
-
-        // propagate leader's failure reasons to the pending entity
-        EntityScriptDetails leaderDetails;
-        {
-            QWriteLocker locker { &_entityScriptsLock };
-            leaderDetails = _entityScripts[leaderID];
-        }
-        if (leaderDetails.status != EntityScriptStatus::RUNNING) {
-            qCDebug(scriptengine) << QString("... pending load of %1 cancelled (leader: %2 status: %3)")
-                .arg(retry.entityID.toString()).arg(leaderID.toString()).arg(leaderDetails.status);
-
-            auto extraDetail = QString("\n(propagated from %1)").arg(leaderID.toString());
-            if (leaderDetails.status == EntityScriptStatus::ERROR_LOADING_SCRIPT ||
-                leaderDetails.status == EntityScriptStatus::ERROR_RUNNING_SCRIPT) {
-                // propagate same error so User doesn't have to hunt down stampede's leader
-                updateEntityScriptStatus(retry.entityID, leaderDetails.status, leaderDetails.errorInfo + extraDetail);
-            } else {
-                // the leader Entity somehow ended up in some other state (rapid-fire delete or unload could cause)
-                updateEntityScriptStatus(retry.entityID, EntityScriptStatus::ERROR_LOADING_SCRIPT,
-                    "A previous Entity failed to load using this script URL; reload to try again." + extraDetail);
-            }
-            continue;
-        }
-
-        if (_occupiedScriptURLs.contains(retry.entityScript)) {
-            qCWarning(scriptengine) << "--- SHOULD NOT HAPPEN -- recursive call into processDeferredEntityLoads" << retry.entityScript;
-            continue;
-        }
-
-        // if we made it here then the leading entity was successful so proceed with normal load
-        loadEntityScript(retry.entityID, retry.entityScript, false);
-    }
-}
-
 void ScriptEngine::loadEntityScript(const EntityItemID& entityID, const QString& entityScript, bool forceRedownload) {
     if (QThread::currentThread() != thread()) {
         QMetaObject::invokeMethod(this, "loadEntityScript",
@@ -2147,40 +2085,6 @@ void ScriptEngine::loadEntityScript(const EntityItemID& entityID, const QString&
         updateEntityScriptStatus(entityID, EntityScriptStatus::PENDING, "...pending...");
     }
 
-    // This "occupied" approach allows multiple Entities to boot from the same script URL while still taking
-    // full advantage of cacheable require modules.  This only affects Entities literally coming in back-to-back
-    // before the first one has time to finish loading.
-    if (_occupiedScriptURLs.contains(entityScript)) {
-        auto currentEntityID = _occupiedScriptURLs[entityScript];
-        if (currentEntityID == BAD_SCRIPT_UUID_PLACEHOLDER) {
-            if (forceRedownload) {
-                // script was previously marked unusable, but we're reloading so reset it
-                _occupiedScriptURLs.remove(entityScript);
-            } else {
-                // since not reloading, assume that the exact same input would produce the exact same output again
-                // note: this state gets reset with "reload all scripts," leaving/returning to a Domain, clear cache, etc.
-#ifdef DEBUG_ENTITY_STATES
-                qCDebug(scriptengine) << QString("loadEntityScript.cancelled entity: %1 (previous script failure)")
-                    .arg(entityID.toString());
-#endif
-                updateEntityScriptStatus(entityID, EntityScriptStatus::ERROR_LOADING_SCRIPT,
-                                         "A previous Entity failed to load using this script URL; reload to try again.");
-                return;
-            }
-        } else {
-            // another entity is busy loading from this script URL so wait for them to finish
-#ifdef DEBUG_ENTITY_STATES
-            qCDebug(scriptengine) << QString("loadEntityScript.deferring[%0] entity: %1  (waiting on %2 )")
-                .arg(_deferredEntityLoads.size()).arg(entityID.toString()).arg(currentEntityID.toString());
-#endif
-            _deferredEntityLoads.push_back({ entityID, entityScript });
-            return;
-        }
-    }
-
-    // the scriptURL slot is available; flag as in-use
-    _occupiedScriptURLs[entityScript] = entityID;
-
 #ifdef DEBUG_ENTITY_STATES
     {
         EntityScriptDetails details;
@@ -2223,10 +2127,6 @@ void ScriptEngine::loadEntityScript(const EntityItemID& entityID, const QString&
                     qCDebug(scriptengine) << "loadEntityScript.contentAvailable -- aborting";
 #endif
                 }
-                // recheck whether us since may have been set to BAD_SCRIPT_UUID_PLACEHOLDER in entityScriptContentAvailable
-                if (_occupiedScriptURLs.contains(entityScript) && _occupiedScriptURLs[entityScript] == entityID) {
-                    _occupiedScriptURLs.remove(entityScript);
-                }
             });
     }, forceRedownload);
 }
@@ -2301,13 +2201,6 @@ void ScriptEngine::entityScriptContentAvailable(const EntityItemID& entityID, co
         newDetails.errorInfo = errorInfo;
         newDetails.status = status;
         setEntityScriptDetails(entityID, newDetails);
-
-#ifdef DEBUG_ENTITY_STATES
-        qCDebug(scriptengine) << "entityScriptContentAvailable -- flagging as BAD_SCRIPT_UUID_PLACEHOLDER";
-#endif
-        // flag the original entityScript as unusuable
-        _occupiedScriptURLs[entityScript] = BAD_SCRIPT_UUID_PLACEHOLDER;
-        processDeferredEntityLoads(entityScript, entityID);
     };
 
     // NETWORK / FILESYSTEM ERRORS
@@ -2441,9 +2334,6 @@ void ScriptEngine::entityScriptContentAvailable(const EntityItemID& entityID, co
     callEntityScriptMethod(entityID, "preload");
 
     emit entityScriptPreloadFinished(entityID);
-
-    _occupiedScriptURLs.remove(entityScript);
-    processDeferredEntityLoads(entityScript, entityID);
 }
 
 /**jsdoc
@@ -2499,10 +2389,6 @@ void ScriptEngine::unloadEntityScript(const EntityItemID& entityID, bool shouldR
         }
 
         stopAllTimersForEntityScript(entityID);
-        {
-            // FIXME: shouldn't have to do this here, but currently something seems to be firing unloads moments after firing initial load requests
-            processDeferredEntityLoads(scriptText, entityID);
-        }
     }
 }
 
@@ -2532,7 +2418,6 @@ void ScriptEngine::unloadAllEntityScripts() {
         _entityScripts.clear();
     }
     emit entityScriptDetailsUpdated();
-    _occupiedScriptURLs.clear();
 
 #ifdef DEBUG_ENGINE_STATE
     _debugDump(
diff --git a/libraries/script-engine/src/ScriptEngine.h b/libraries/script-engine/src/ScriptEngine.h
index fe8396bc50..8fe50aee78 100644
--- a/libraries/script-engine/src/ScriptEngine.h
+++ b/libraries/script-engine/src/ScriptEngine.h
@@ -747,7 +747,6 @@ protected:
     void updateEntityScriptStatus(const EntityItemID& entityID, const EntityScriptStatus& status, const QString& errorInfo = QString());
     void setEntityScriptDetails(const EntityItemID& entityID, const EntityScriptDetails& details);
     void setParentURL(const QString& parentURL) { _parentURL = parentURL; }
-    void processDeferredEntityLoads(const QString& entityScript, const EntityItemID& leaderID);
 
     QObject* setupTimerWithInterval(const QScriptValue& function, int intervalMS, bool isSingleShot);
     void stopTimer(QTimer* timer);
@@ -783,8 +782,6 @@ protected:
     QSet<QUrl> _includedURLs;
     mutable QReadWriteLock _entityScriptsLock { QReadWriteLock::Recursive };
     QHash<EntityItemID, EntityScriptDetails> _entityScripts;
-    QHash<QString, EntityItemID> _occupiedScriptURLs;
-    QList<DeferredLoadEntity> _deferredEntityLoads;
     EntityScriptContentAvailableMap _contentAvailableQueue;
 
     bool _isThreaded { false };
diff --git a/plugins/openvr/src/ViveControllerManager.cpp b/plugins/openvr/src/ViveControllerManager.cpp
index 283556f86a..53c23403a5 100644
--- a/plugins/openvr/src/ViveControllerManager.cpp
+++ b/plugins/openvr/src/ViveControllerManager.cpp
@@ -138,6 +138,8 @@ static QString outOfRangeDataStrategyToString(ViveControllerManager::OutOfRangeD
         return "Freeze";
     case ViveControllerManager::OutOfRangeDataStrategy::Drop:
         return "Drop";
+    case ViveControllerManager::OutOfRangeDataStrategy::DropAfterDelay:
+        return "DropAfterDelay";
     }
 }
 
@@ -146,6 +148,8 @@ static ViveControllerManager::OutOfRangeDataStrategy stringToOutOfRangeDataStrat
         return ViveControllerManager::OutOfRangeDataStrategy::Drop;
     } else if (string == "Freeze") {
         return ViveControllerManager::OutOfRangeDataStrategy::Freeze;
+    } else if (string == "DropAfterDelay") {
+        return ViveControllerManager::OutOfRangeDataStrategy::DropAfterDelay;
     } else {
         return ViveControllerManager::OutOfRangeDataStrategy::None;
     }
@@ -302,7 +306,7 @@ void ViveControllerManager::loadSettings() {
         if (_inputDevice) {
             const double DEFAULT_ARM_CIRCUMFERENCE = 0.33;
             const double DEFAULT_SHOULDER_WIDTH = 0.48;
-            const QString DEFAULT_OUT_OF_RANGE_STRATEGY = "Drop";
+            const QString DEFAULT_OUT_OF_RANGE_STRATEGY = "DropAfterDelay";
             _inputDevice->_armCircumference = settings.value("armCircumference", QVariant(DEFAULT_ARM_CIRCUMFERENCE)).toDouble();
             _inputDevice->_shoulderWidth = settings.value("shoulderWidth", QVariant(DEFAULT_SHOULDER_WIDTH)).toDouble();
             _inputDevice->_outOfRangeDataStrategy = stringToOutOfRangeDataStrategy(settings.value("outOfRangeDataStrategy", QVariant(DEFAULT_OUT_OF_RANGE_STRATEGY)).toString());
@@ -516,6 +520,7 @@ void ViveControllerManager::InputDevice::handleTrackedObject(uint32_t deviceInde
         _nextSimPoseData.vrPoses[deviceIndex].bPoseIsValid &&
         poseIndex <= controller::TRACKED_OBJECT_15) {
 
+        uint64_t now = usecTimestampNow();
         controller::Pose pose;
         switch (_outOfRangeDataStrategy) {
         case OutOfRangeDataStrategy::Drop:
@@ -544,6 +549,22 @@ void ViveControllerManager::InputDevice::handleTrackedObject(uint32_t deviceInde
                 _nextSimPoseData.angularVelocities[deviceIndex] = _lastSimPoseData.angularVelocities[deviceIndex];
             }
             break;
+        case OutOfRangeDataStrategy::DropAfterDelay:
+            const uint64_t DROP_DELAY_TIME = 500 * USECS_PER_MSEC;
+
+            // All Running_OK results are valid.
+            if (_nextSimPoseData.vrPoses[deviceIndex].eTrackingResult == vr::TrackingResult_Running_OK) {
+                pose = buildPose(_nextSimPoseData.poses[deviceIndex], _nextSimPoseData.linearVelocities[deviceIndex], _nextSimPoseData.angularVelocities[deviceIndex]);
+                // update the timer
+                _simDataRunningOkTimestampMap[deviceIndex] = now;
+            } else if (now - _simDataRunningOkTimestampMap[deviceIndex] < DROP_DELAY_TIME) {
+                // report the pose, even though pose is out-of-range
+                pose = buildPose(_nextSimPoseData.poses[deviceIndex], _nextSimPoseData.linearVelocities[deviceIndex], _nextSimPoseData.angularVelocities[deviceIndex]);
+            } else {
+                // this pose has been out-of-range for too long.
+                pose.valid = false;
+            }
+            break;
         }
 
         if (pose.valid) {
diff --git a/plugins/openvr/src/ViveControllerManager.h b/plugins/openvr/src/ViveControllerManager.h
index 647702ae77..dbd248dc53 100644
--- a/plugins/openvr/src/ViveControllerManager.h
+++ b/plugins/openvr/src/ViveControllerManager.h
@@ -63,7 +63,8 @@ public:
     enum class OutOfRangeDataStrategy {
         None,
         Freeze,
-        Drop
+        Drop,
+        DropAfterDelay
     };
 
 private:
@@ -205,6 +206,8 @@ private:
 
         bool _hmdTrackingEnabled { true };
 
+        std::map<uint32_t, uint64_t> _simDataRunningOkTimestampMap;
+
         QString configToString(Config config);
         friend class ViveControllerManager;
     };
diff --git a/scripts/system/assets/data/createAppTooltips.json b/scripts/system/assets/data/createAppTooltips.json
index 3a25402588..9f77a86dc9 100644
--- a/scripts/system/assets/data/createAppTooltips.json
+++ b/scripts/system/assets/data/createAppTooltips.json
@@ -193,22 +193,52 @@
     "emitterShouldTrail": {
         "tooltip": "If enabled, then particles are \"left behind\" as the emitter moves, otherwise they are not."
     },
+    "particleRadiusTriple": {
+        "tooltip": "The size of each particle.",
+        "jsPropertyName": "particleRadius"
+    },
     "particleRadius": {
         "tooltip": "The size of each particle."
     },
+    "radiusStart": {
+        "tooltip": "The start size of each particle."
+    },
+    "radiusFinish": {
+        "tooltip": "The finish size of each particle."
+    },
     "radiusSpread": {
         "tooltip": "The spread in size that each particle is given, resulting in a variety of sizes."
     },
+    "particleColorTriple": {
+        "tooltip": "The color of each particle.",
+        "jsPropertyName": "color"
+    },
     "particleColor": {
         "tooltip": "The color of each particle.",
         "jsPropertyName": "color"
     },
+    "colorStart": {
+        "tooltip": "The start color of each particle."
+    },
+    "colorFinish": {
+        "tooltip": "The finish color of each particle."
+    },
     "colorSpread": {
         "tooltip": "The spread in color that each particle is given, resulting in a variety of colors."
     },
+    "particleAlphaTriple": {
+        "tooltip": "The alpha of each particle.",
+        "jsPropertyName": "alpha"
+    },
     "alpha": {
         "tooltip": "The alpha of each particle."
     },
+    "alphaStart": {
+        "tooltip": "The start alpha of each particle."
+    },
+    "alphaFinish": {
+        "tooltip": "The finish alpha of each particle."
+    },
     "alphaSpread": {
         "tooltip": "The spread in alpha that each particle is given, resulting in a variety of alphas."
     },
@@ -218,20 +248,44 @@
     "accelerationSpread": {
         "tooltip": "The spread in accelerations that each particle is given, resulting in a variety of accelerations."
     },
+    "particleSpinTriple": {
+        "tooltip": "The spin of each particle.",
+        "jsPropertyName": "particleSpin"
+    },
     "particleSpin": {
-        "tooltip": "The spin of each particle in the system."
+        "tooltip": "The spin of each particle."
+    },
+    "spinStart": {
+        "tooltip": "The start spin of each particle."
+    },
+    "spinFinish": {
+        "tooltip": "The finish spin of each particle."
     },
     "spinSpread": {
         "tooltip": "The spread in spin that each particle is given, resulting in a variety of spins."
     },
     "rotateWithEntity": {
-        "tooltip": "If enabled, each particle will spin relative to the roation of the entity as a whole."
+        "tooltip": "If enabled, each particle will spin relative to the rotation of the entity as a whole."
+    },
+    "particlePolarTriple": {
+        "tooltip": "The angle range in deg at which particles are emitted. Starts in the entity's -z direction, and rotates around its y axis.",
+        "skipJSProperty": true
     },
     "polarStart": {
-        "tooltip": "The angle in deg at which particles are emitted. Starts in the entity's -z direction, and rotates around its y axis."
+        "tooltip": "The start angle in deg at which particles are emitted. Starts in the entity's -z direction, and rotates around its y axis."
+    },
+    "polarFinish": {
+        "tooltip": "The finish angle in deg at which particles are emitted. Starts in the entity's -z direction, and rotates around its y axis."
+    },
+    "particleAzimuthTriple": {
+        "tooltip": "The angle range in deg at which particles are emitted.  Starts in the entity's -x direction, and rotates around its z axis.",
+        "skipJSProperty": true
     },
     "azimuthStart": {
-        "tooltip": "The angle in deg at which particles are emitted.  Starts in the entity's -z direction, and rotates around its y axis."
+        "tooltip": "The start angle in deg at which particles are emitted.  Starts in the entity's -x direction, and rotates around its z axis."
+    },
+    "azimuthFinish": {
+        "tooltip": "The finish angle in deg at which particles are emitted.  Starts in the entity's -x direction, and rotates around its z axis."
     },
     "lightColor": {
         "tooltip": "The color of the light emitted.",
@@ -352,7 +406,7 @@
         "tooltip": "The URL of a sound to play when the entity collides with something else."
     },
     "grab.grabbable": {
-        "tooltip": "If enabled, this entity will allow grabbing input and will be moveable."
+        "tooltip": "If enabled, this entity will allow grabbing input and will be movable."
     },
     "grab.triggerable": {
         "tooltip": "If enabled, the collider on this entity is used for triggering events."
diff --git a/scripts/system/html/css/edit-style.css b/scripts/system/html/css/edit-style.css
index d7d88ce91e..c5979c41e2 100644
--- a/scripts/system/html/css/edit-style.css
+++ b/scripts/system/html/css/edit-style.css
@@ -600,6 +600,7 @@ div.section[collapsed="true"], div.section[collapsed="true"] > .section-header {
     text-transform: uppercase;
     text-align: center;
     padding: 6px 0;
+    cursor: default;
 }
 
 .triple-item {
@@ -1390,6 +1391,10 @@ input[type=button]#export {
     cursor: col-resize;
 }
 
+#entity-table .dragging {
+    background-color: #b3ecff;
+}
+
 #entity-table td {
     box-sizing: border-box;
 }
@@ -1517,6 +1522,7 @@ input.rename-entity {
 }
 
 .create-app-tooltip {
+    z-index: 100;
     position: absolute;
     background: #6a6a6a;
     border: 1px solid black;
@@ -1651,6 +1657,7 @@ input.number-slider {
     font-family: Raleway-Light;
     font-size: 14px;
     margin: 6px 0;
+    cursor: default;
 }
 
 #property-name, #property-id {
@@ -1663,9 +1670,38 @@ input.number-slider {
 }
 
 #placeholder-property-type {
-    min-width: 0px;
+    min-width: 0;
 }
 
 .collapse-icon {
     cursor: pointer;
 }
+
+#property-userData-editor.error {
+    border: 2px solid red;
+}
+
+#property-userData-editorStatus {
+    color: white;
+    background-color: red;
+    padding: 5px;
+    display: none;
+    cursor: pointer;
+}
+
+#property-materialData-editor.error {
+    border: 2px solid red;
+}
+
+#property-materialData-editorStatus {
+    color: white;
+    background-color: red;
+    padding: 5px;
+    display: none;
+    cursor: pointer;
+}
+
+input[type=number].hide-spinner::-webkit-inner-spin-button {
+    -webkit-appearance: none;
+    visibility: hidden;
+}
diff --git a/scripts/system/html/entityList.html b/scripts/system/html/entityList.html
index 6915a45f19..f9948bc8b0 100644
--- a/scripts/system/html/entityList.html
+++ b/scripts/system/html/entityList.html
@@ -18,6 +18,7 @@
         <script type="text/javascript" src="js/spinButtons.js"></script>
         <script type="text/javascript" src="js/listView.js"></script>
         <script type="text/javascript" src="js/entityListContextMenu.js"></script>
+        <script type="text/javascript" src="js/utils.js"></script>
         <script type="text/javascript" src="js/entityList.js"></script>
     </head>
     <body onload='loaded();' id="entity-list-body">
diff --git a/scripts/system/html/entityProperties.html b/scripts/system/html/entityProperties.html
index 01395368b0..a8bcabbfea 100644
--- a/scripts/system/html/entityProperties.html
+++ b/scripts/system/html/entityProperties.html
@@ -23,6 +23,7 @@
     <script type="text/javascript" src="js/underscore-min.js"></script>
     <script type="text/javascript" src="js/createAppTooltip.js"></script>
     <script type="text/javascript" src="js/draggableNumber.js"></script>
+    <script type="text/javascript" src="js/utils.js"></script>
     <script type="text/javascript" src="js/entityProperties.js"></script>
     <script src="js/jsoneditor.min.js"></script>
 </head>
diff --git a/scripts/system/html/gridControls.html b/scripts/system/html/gridControls.html
index 4be002619a..8d6ee34bc0 100644
--- a/scripts/system/html/gridControls.html
+++ b/scripts/system/html/gridControls.html
@@ -16,6 +16,7 @@
         <script type="text/javascript" src="qrc:///qtwebchannel/qwebchannel.js"></script>
         <script type="text/javascript" src="js/eventBridgeLoader.js"></script>
         <script type="text/javascript" src="js/spinButtons.js"></script>
+        <script type="text/javascript" src="js/utils.js"></script>
         <script type="text/javascript" src="js/gridControls.js"></script>
     </head>
     <body onload='loaded();'>
diff --git a/scripts/system/html/js/entityList.js b/scripts/system/html/js/entityList.js
index 15353db48e..89b56c7f7b 100644
--- a/scripts/system/html/js/entityList.js
+++ b/scripts/system/html/js/entityList.js
@@ -21,6 +21,9 @@ const MAX_LENGTH_RADIUS = 9;
 const MINIMUM_COLUMN_WIDTH = 24;
 const SCROLLBAR_WIDTH = 20;
 const RESIZER_WIDTH = 10;
+const DELTA_X_MOVE_COLUMNS_THRESHOLD = 2;
+const DELTA_X_COLUMN_SWAP_POSITION = 5;
+const CERTIFIED_PLACEHOLDER = "** Certified **";
 
 const COLUMNS = {
     type: {
@@ -108,8 +111,8 @@ const COLUMNS = {
 };
 
 const COMPARE_ASCENDING = function(a, b) {
-    let va = a[currentSortColumn];
-    let vb = b[currentSortColumn];
+    let va = a[currentSortColumnID];
+    let vb = b[currentSortColumnID];
 
     if (va < vb) {
         return -1;
@@ -172,7 +175,7 @@ let entityList = null; // The ListView
  */
 let entityListContextMenu = null;
 
-let currentSortColumn = 'type';
+let currentSortColumnID = 'type';
 let currentSortOrder = ASCENDING_SORT;
 let elSortOrders = {};
 let typeFilters = [];
@@ -180,10 +183,13 @@ let isFilterInView = false;
 
 let columns = [];
 let columnsByID = {};
-let currentResizeEl = null;
-let startResizeEvent = null;
+let lastResizeEvent = null;
 let resizeColumnIndex = 0;
-let startThClick = null;
+let elTargetTh = null;
+let elTargetSpan = null;
+let targetColumnIndex = 0;
+let lastColumnSwapPosition = -1;
+let initialThEvent = null;
 let renameTimeout = null;
 let renameLastBlur = null;
 let renameLastEntityID = null;
@@ -230,10 +236,6 @@ const PROFILE = !ENABLE_PROFILING ? PROFILE_NOOP : function(name, fn, args) {
     console.log("PROFILE-Web " + profileIndent + "(" + name + ") End " + delta + "ms");
 };
 
-debugPrint = function (message) {
-    console.log(message);
-};
-
 function loaded() {
     openEventBridge(function() {
         elEntityTable = document.getElementById("entity-table");
@@ -324,10 +326,11 @@ function loaded() {
         for (let columnID in COLUMNS) {
             let columnData = COLUMNS[columnID];
             
-            let thID = "entity-" + columnID;
             let elTh = document.createElement("th");
+            let thID = "entity-" + columnID;
             elTh.setAttribute("id", thID);
-            elTh.setAttribute("data-resizable-column-id", thID);
+            elTh.setAttribute("columnIndex", columnIndex);
+            elTh.setAttribute("columnID", columnID);
             if (columnData.glyph) {
                 let elGlyph = document.createElement("span");
                 elGlyph.className = "glyph";
@@ -336,20 +339,20 @@ function loaded() {
             } else {
                 elTh.innerText = columnData.columnHeader;
             }
-            elTh.onmousedown = function() {
-                startThClick = this;
-            };
-            elTh.onmouseup = function() {
-                if (startThClick === this) {
-                    setSortColumn(columnID);
+            elTh.onmousedown = function(event) {
+                if (event.target.nodeName === 'TH') {
+                    elTargetTh = event.target;
+                    targetColumnIndex = parseInt(elTargetTh.getAttribute("columnIndex"));
+                    lastColumnSwapPosition = event.clientX;
+                } else if (event.target.nodeName === 'SPAN') {
+                    elTargetSpan = event.target;
                 }
-                startThClick = null;
+                initialThEvent = event;
             };
 
             let elResizer = document.createElement("span");
             elResizer.className = "resizer";
             elResizer.innerHTML = "&nbsp;";
-            elResizer.setAttribute("columnIndex", columnIndex);
             elResizer.onmousedown = onStartResize;
             elTh.appendChild(elResizer);
 
@@ -633,10 +636,11 @@ function loaded() {
                         id: entity.id,
                         name: entity.name,
                         type: type,
-                        url: filename,
-                        fullUrl: entity.url,
+                        url: entity.certificateID === "" ? filename : "<i>" + CERTIFIED_PLACEHOLDER + "</i>",
+                        fullUrl: entity.certificateID === "" ? filename : CERTIFIED_PLACEHOLDER,
                         locked: entity.locked,
                         visible: entity.visible,
+                        certificateID: entity.certificateID,
                         verticesCount: displayIfNonZero(entity.verticesCount),
                         texturesCount: displayIfNonZero(entity.texturesCount),
                         texturesSize: decimalMegabytes(entity.texturesSize),
@@ -762,13 +766,13 @@ function loaded() {
             refreshNoEntitiesMessage();
         }
 
-        function setSortColumn(column) {
+        function setSortColumn(columnID) {
             PROFILE("set-sort-column", function() {
-                if (currentSortColumn === column) {
+                if (currentSortColumnID === columnID) {
                     currentSortOrder *= -1;
                 } else {
-                    elSortOrders[currentSortColumn].innerHTML = "";
-                    currentSortColumn = column;
+                    elSortOrders[currentSortColumnID].innerHTML = "";
+                    currentSortColumnID = columnID;
                     currentSortOrder = ASCENDING_SORT;
                 }
                 refreshSortOrder();
@@ -777,7 +781,7 @@ function loaded() {
         }
         
         function refreshSortOrder() {
-            elSortOrders[currentSortColumn].innerHTML = currentSortOrder === ASCENDING_SORT ? ASCENDING_STRING : DESCENDING_STRING;
+            elSortOrders[currentSortColumnID].innerHTML = currentSortOrder === ASCENDING_SORT ? ASCENDING_STRING : DESCENDING_STRING;
         }
         
         function refreshEntities() {
@@ -874,7 +878,7 @@ function loaded() {
                 if (column.data.glyph) {
                     elCell.innerHTML = itemData[column.data.propertyID] ? column.data.columnHeader : null;
                 } else {
-                    elCell.innerText = itemData[column.data.propertyID];
+                    elCell.innerHTML = itemData[column.data.propertyID];
                 }
                 elCell.style = "min-width:" + column.widthPx + "px;" + "max-width:" + column.widthPx + "px;";
                 elCell.className = createColumnClassName(column.columnID);
@@ -1093,8 +1097,8 @@ function loaded() {
         }
         
         function onStartResize(event) {
-            startResizeEvent = event;
-            resizeColumnIndex = parseInt(this.getAttribute("columnIndex"));
+            lastResizeEvent = event;
+            resizeColumnIndex = parseInt(this.parentNode.getAttribute("columnIndex"));
             event.stopPropagation();
         }
         
@@ -1137,8 +1141,37 @@ function loaded() {
             entityList.refresh();
         }
         
-        document.onmousemove = function(ev) {
-            if (startResizeEvent) {
+        function swapColumns(columnAIndex, columnBIndex) {
+            let columnA = columns[columnAIndex];
+            let columnB = columns[columnBIndex];
+            let columnATh = columns[columnAIndex].elTh;
+            let columnBTh = columns[columnBIndex].elTh;
+            let columnThParent = columnATh.parentNode;
+            columnThParent.removeChild(columnBTh);
+            columnThParent.insertBefore(columnBTh, columnATh);
+            columnATh.setAttribute("columnIndex", columnBIndex);
+            columnBTh.setAttribute("columnIndex", columnAIndex);
+            columnA.elResizer.setAttribute("columnIndex", columnBIndex);
+            columnB.elResizer.setAttribute("columnIndex", columnAIndex);
+            
+            for (let i = 0; i < visibleEntities.length; ++i) {
+                let elRow = visibleEntities[i].elRow;
+                if (elRow) {
+                    let columnACell = elRow.childNodes[columnAIndex];
+                    let columnBCell = elRow.childNodes[columnBIndex];
+                    elRow.removeChild(columnBCell);
+                    elRow.insertBefore(columnBCell, columnACell);
+                }
+            }
+            
+            columns[columnAIndex] = columnB;
+            columns[columnBIndex] = columnA;
+            
+            updateColumnWidths();
+        }
+        
+        document.onmousemove = function(event) {
+            if (lastResizeEvent) {
                 startTh = null;
                 
                 let column = columns[resizeColumnIndex];
@@ -1150,7 +1183,7 @@ function loaded() {
                 }
 
                 let fullWidth = elEntityTableBody.offsetWidth;
-                let dx = ev.clientX - startResizeEvent.clientX;
+                let dx = event.clientX - lastResizeEvent.clientX;
                 let dPct = dx / fullWidth;
                 
                 let newColWidth = column.width + dPct;
@@ -1160,14 +1193,60 @@ function loaded() {
                     column.width += dPct;
                     nextColumn.width -= dPct;
                     updateColumnWidths();
-                    startResizeEvent = ev;
+                    lastResizeEvent = event;
+                }
+            } else if (elTargetTh) {
+                let dxFromInitial = event.clientX - initialThEvent.clientX;
+                if (Math.abs(dxFromInitial) >= DELTA_X_MOVE_COLUMNS_THRESHOLD) {
+                    elTargetTh.className = "dragging";
+                }
+                if (targetColumnIndex < columns.length - 1) {
+                    let nextColumnIndex = targetColumnIndex + 1;
+                    let nextColumnTh = columns[nextColumnIndex].elTh;
+                    let nextColumnStartX = nextColumnTh.getBoundingClientRect().left;
+                    if (event.clientX >= nextColumnStartX && event.clientX - lastColumnSwapPosition >= DELTA_X_COLUMN_SWAP_POSITION) {
+                        swapColumns(targetColumnIndex, nextColumnIndex);
+                        targetColumnIndex = nextColumnIndex;
+                        lastColumnSwapPosition = event.clientX;
+                    }
+                }
+                if (targetColumnIndex >= 1) {
+                    let prevColumnIndex = targetColumnIndex - 1;
+                    let prevColumnTh = columns[prevColumnIndex].elTh;
+                    let prevColumnEndX = prevColumnTh.getBoundingClientRect().right;
+                    if (event.clientX <= prevColumnEndX && lastColumnSwapPosition - event.clientX >= DELTA_X_COLUMN_SWAP_POSITION) {
+                        swapColumns(prevColumnIndex, targetColumnIndex);
+                        targetColumnIndex = prevColumnIndex;
+                        lastColumnSwapPosition = event.clientX;
+                    }
+                }
+            } else if (elTargetSpan) {
+                let dxFromInitial = event.clientX - initialThEvent.clientX;
+                if (Math.abs(dxFromInitial) >= DELTA_X_MOVE_COLUMNS_THRESHOLD) {
+                    elTargetTh = elTargetSpan.parentNode;
+                    elTargetTh.className = "dragging";
+                    targetColumnIndex = parseInt(elTargetTh.getAttribute("columnIndex"));
+                    lastColumnSwapPosition = event.clientX;
+                    elTargetSpan = null;
                 }
             }
         };
         
-        document.onmouseup = function(ev) {
-            startResizeEvent = null;
-            ev.stopPropagation();
+        document.onmouseup = function(event) {
+            if (elTargetTh) {
+                if (elTargetTh.className !== "dragging" && elTargetTh === event.target) {
+                    let columnID = elTargetTh.getAttribute("columnID");
+                    setSortColumn(columnID);
+                }
+                elTargetTh.className = "";
+            } else if (elTargetSpan) {
+                let columnID = elTargetSpan.parentNode.getAttribute("columnID");
+                setSortColumn(columnID);
+            }
+            lastResizeEvent = null;
+            elTargetTh = null;
+            elTargetSpan = null;
+            initialThEvent = null;
         };
 
         function setSpaceMode(spaceMode) {
@@ -1287,8 +1366,9 @@ function loaded() {
     });
     
     augmentSpinButtons();
+    disableDragDrop();
 
-    document.addEventListener("contextmenu", function (event) {
+    document.addEventListener("contextmenu", function(event) {
         entityListContextMenu.close();
 
         // Disable default right-click context menu which is not visible in the HMD and makes it seem like the app has locked
diff --git a/scripts/system/html/js/entityProperties.js b/scripts/system/html/js/entityProperties.js
index 1026fbfdeb..4e4e73df92 100644
--- a/scripts/system/html/js/entityProperties.js
+++ b/scripts/system/html/js/entityProperties.js
@@ -75,7 +75,7 @@ const GROUPS = [
             },
             {
                 label: "Parent Joint Index",
-                type: "number",
+                type: "number-draggable",
                 propertyID: "parentJointIndex",
             },
             {
@@ -135,7 +135,7 @@ const GROUPS = [
             },
             {
                 label: "Line Height",
-                type: "number",
+                type: "number-draggable",
                 min: 0,
                 step: 0.005,
                 decimals: 4,
@@ -183,7 +183,7 @@ const GROUPS = [
             },
             {
                 label: "Light Intensity",
-                type: "number",
+                type: "number-draggable",
                 min: 0,
                 max: 10,
                 step: 0.1,
@@ -193,7 +193,7 @@ const GROUPS = [
             },
             {
                 label: "Light Horizontal Angle",
-                type: "number",
+                type: "number-draggable",
                 multiplier: DEGREES_TO_RADIANS,
                 decimals: 2,
                 unit: "deg",
@@ -202,7 +202,7 @@ const GROUPS = [
             },
             {
                 label: "Light Vertical Angle",
-                type: "number",
+                type: "number-draggable",
                 multiplier: DEGREES_TO_RADIANS,
                 decimals: 2,
                 unit: "deg",
@@ -241,7 +241,7 @@ const GROUPS = [
             },
             {
                 label: "Ambient Intensity",
-                type: "number",
+                type: "number-draggable",
                 min: 0,
                 max: 10,
                 step: 0.1,
@@ -270,7 +270,7 @@ const GROUPS = [
             },
             {
                 label: "Range",
-                type: "number",
+                type: "number-draggable",
                 min: 5,
                 max: 10000,
                 step: 5,
@@ -287,7 +287,7 @@ const GROUPS = [
             },
             {
                 label: "Base",
-                type: "number",
+                type: "number-draggable",
                 min: -1000,
                 max: 1000,
                 step: 10,
@@ -298,7 +298,7 @@ const GROUPS = [
             },
             {
                 label: "Ceiling",
-                type: "number",
+                type: "number-draggable",
                 min: -1000,
                 max: 5000,
                 step: 10,
@@ -315,7 +315,7 @@ const GROUPS = [
             },
             {
                 label: "Background Blend",
-                type: "number",
+                type: "number-draggable",
                 min: 0,
                 max: 1,
                 step: 0.01,
@@ -337,7 +337,7 @@ const GROUPS = [
             },
             {
                 label: "Glare Angle",
-                type: "number",
+                type: "number-draggable",
                 min: 0,
                 max: 180,
                 step: 1,
@@ -353,7 +353,7 @@ const GROUPS = [
             },
             {
                 label: "Bloom Intensity",
-                type: "number",
+                type: "number-draggable",
                 min: 0,
                 max: 1,
                 step: 0.01,
@@ -363,7 +363,7 @@ const GROUPS = [
             },
             {
                 label: "Bloom Threshold",
-                type: "number",
+                type: "number-draggable",
                 min: 0,
                 max: 1,
                 step: 0.01,
@@ -373,7 +373,7 @@ const GROUPS = [
             },
             {
                 label: "Bloom Size",
-                type: "number",
+                type: "number-draggable",
                 min: 0,
                 max: 2,
                 step: 0.01,
@@ -390,7 +390,9 @@ const GROUPS = [
             {
                 label: "Model",
                 type: "string",
+                placeholder: "URL",
                 propertyID: "modelURL",
+                hideIfCertified: true,
             },
             {
                 label: "Collision Shape",
@@ -404,11 +406,13 @@ const GROUPS = [
                 label: "Compound Shape",
                 type: "string",
                 propertyID: "compoundShapeURL",
+                hideIfCertified: true,
             },
             {
                 label: "Animation",
                 type: "string",
                 propertyID: "animation.url",
+                hideIfCertified: true,
             },
             {
                 label: "Play Automatically",
@@ -432,22 +436,22 @@ const GROUPS = [
             },
             {
                 label: "Animation Frame",
-                type: "number",
+                type: "number-draggable",
                 propertyID: "animation.currentFrame",
             },
             {
                 label: "First Frame",
-                type: "number",
+                type: "number-draggable",
                 propertyID: "animation.firstFrame",
             },
             {
                 label: "Last Frame",
-                type: "number",
+                type: "number-draggable",
                 propertyID: "animation.lastFrame",
             },
             {
                 label: "Animation FPS",
-                type: "number",
+                type: "number-draggable",
                 propertyID: "animation.fps",
             },
             {
@@ -460,6 +464,7 @@ const GROUPS = [
                 type: "textarea",
                 propertyID: "originalTextures",
                 readOnly: true,
+                hideIfCertified: true,
             },
         ]
     },
@@ -486,7 +491,7 @@ const GROUPS = [
             },
             {
                 label: "Source Resolution",
-                type: "number",
+                type: "number-draggable",
                 propertyID: "dpi",
             },
         ]
@@ -503,7 +508,7 @@ const GROUPS = [
             },
             {
                 label: "Intensity",
-                type: "number",
+                type: "number-draggable",
                 min: 0,
                 step: 0.1,
                 decimals: 1,
@@ -511,7 +516,7 @@ const GROUPS = [
             },
             {
                 label: "Fall-Off Radius",
-                type: "number",
+                type: "number-draggable",
                 min: 0,
                 step: 0.1,
                 decimals: 1,
@@ -525,14 +530,14 @@ const GROUPS = [
             },
             {
                 label: "Spotlight Exponent",
-                type: "number",
+                type: "number-draggable",
                 step: 0.01,
                 decimals: 2,
                 propertyID: "exponent",
             },
             {
                 label: "Spotlight Cut-Off",
-                type: "number",
+                type: "number-draggable",
                 step: 0.01,
                 decimals: 2,
                 propertyID: "cutoff",
@@ -563,7 +568,7 @@ const GROUPS = [
             },
             {
                 label: "Submesh to Replace",
-                type: "number",
+                type: "number-draggable",
                 min: 0,
                 step: 1,
                 propertyID: "submeshToReplace",
@@ -577,7 +582,7 @@ const GROUPS = [
             },
             {
                 label: "Priority",
-                type: "number",
+                type: "number-draggable",
                 min: 0,
                 propertyID: "priority",
             },
@@ -612,7 +617,7 @@ const GROUPS = [
             },
             {
                 label: "Material Rotation",
-                type: "number",
+                type: "number-draggable",
                 step: 0.1,
                 decimals: 2,
                 unit: "deg",
@@ -636,7 +641,7 @@ const GROUPS = [
             },
             {
                 label: "Lifespan",
-                type: "number",
+                type: "number-draggable",
                 unit: "s",
                 min: 0.01,
                 max: 10,
@@ -646,7 +651,7 @@ const GROUPS = [
             },
             {
                 label: "Max Particles",
-                type: "number",
+                type: "number-draggable",
                 min: 1,
                 max: 10000,
                 step: 1,
@@ -667,7 +672,7 @@ const GROUPS = [
         properties: [
             {
                 label: "Emit Rate",
-                type: "number",
+                type: "number-draggable",
                 min: 1,
                 max: 1000,
                 step: 1,
@@ -675,7 +680,7 @@ const GROUPS = [
             },
             {
                 label: "Emit Speed",
-                type: "number",
+                type: "number-draggable",
                 min: 0,
                 max: 5,
                 step: 0.01,
@@ -684,7 +689,7 @@ const GROUPS = [
             },
             {
                 label: "Speed Spread",
-                type: "number",
+                type: "number-draggable",
                 min: 0,
                 max: 5,
                 step: 0.01,
@@ -703,7 +708,7 @@ const GROUPS = [
             },
             {
                 label: "Emit Radius Start",
-                type: "number",
+                type: "number-draggable",
                 min: 0,
                 max: 1,
                 step: 0.01,
@@ -735,10 +740,11 @@ const GROUPS = [
             {
                 type: "triple",
                 label: "Size",
+                propertyID: "particleRadiusTriple",
                 properties: [
                     {
                         label: "Start",
-                        type: "number",
+                        type: "number-draggable",
                         min: 0,
                         max: 4,
                         step: 0.01,
@@ -748,7 +754,7 @@ const GROUPS = [
                     },
                     {
                         label: "Middle",
-                        type: "number",
+                        type: "number-draggable",
                         min: 0,
                         max: 4,
                         step: 0.01,
@@ -757,7 +763,7 @@ const GROUPS = [
                     },
                     {
                         label: "Finish",
-                        type: "number",
+                        type: "number-draggable",
                         min: 0,
                         max: 4,
                         step: 0.01,
@@ -769,7 +775,7 @@ const GROUPS = [
             },
             {
                 label: "Size Spread",
-                type: "number",
+                type: "number-draggable",
                 min: 0,
                 max: 4,
                 step: 0.01,
@@ -786,6 +792,7 @@ const GROUPS = [
             {
                 type: "triple",
                 label: "Color",
+                propertyID: "particleColorTriple",
                 properties: [
                     {
                         label: "Start",
@@ -822,10 +829,11 @@ const GROUPS = [
             {
                 type: "triple",
                 label: "Alpha",
+                propertyID: "particleAlphaTriple",
                 properties: [
                     {
                         label: "Start",
-                        type: "number",
+                        type: "number-draggable",
                         min: 0,
                         max: 1,
                         step: 0.01,
@@ -835,7 +843,7 @@ const GROUPS = [
                     },
                     {
                         label: "Middle",
-                        type: "number",
+                        type: "number-draggable",
                         min: 0,
                         max: 1,
                         step: 0.01,
@@ -844,7 +852,7 @@ const GROUPS = [
                     },
                     {
                         label: "Finish",
-                        type: "number",
+                        type: "number-draggable",
                         min: 0,
                         max: 1,
                         step: 0.01,
@@ -856,7 +864,7 @@ const GROUPS = [
             },
             {
                 label: "Alpha Spread",
-                type: "number",
+                type: "number-draggable",
                 min: 0,
                 max: 1,
                 step: 0.01,
@@ -898,10 +906,11 @@ const GROUPS = [
             {
                 type: "triple",
                 label: "Spin",
+                propertyID: "particleSpinTriple",
                 properties: [
                     {
                         label: "Start",
-                        type: "number",
+                        type: "number-draggable",
                         min: -360,
                         max: 360,
                         step: 1,
@@ -913,7 +922,7 @@ const GROUPS = [
                     },
                     {
                         label: "Middle",
-                        type: "number",
+                        type: "number-draggable",
                         min: -360,
                         max: 360,
                         step: 1,
@@ -924,7 +933,7 @@ const GROUPS = [
                     },
                     {
                         label: "Finish",
-                        type: "number",
+                        type: "number-draggable",
                         min: -360,
                         max: 360,
                         step: 1,
@@ -938,7 +947,7 @@ const GROUPS = [
             },
             {
                 label: "Spin Spread",
-                type: "number",
+                type: "number-draggable",
                 min: 0,
                 max: 360,
                 step: 1,
@@ -962,10 +971,11 @@ const GROUPS = [
             {
                 type: "triple",
                 label: "Horizontal Angle",
+                propertyID: "particlePolarTriple",
                 properties: [
                     {
                         label: "Start",
-                        type: "number",
+                        type: "number-draggable",
                         min: 0,
                         max: 180,
                         step: 1,
@@ -976,7 +986,7 @@ const GROUPS = [
                     },
                     {
                         label: "Finish",
-                        type: "number",
+                        type: "number-draggable",
                         min: 0,
                         max: 180,
                         step: 1,
@@ -990,10 +1000,11 @@ const GROUPS = [
             {
                 type: "triple",
                 label: "Vertical Angle",
+                propertyID: "particleAzimuthTriple",
                 properties: [
                     {
                         label: "Start",
-                        type: "number",
+                        type: "number-draggable",
                         min: -180,
                         max: 180,
                         step: 1,
@@ -1004,7 +1015,7 @@ const GROUPS = [
                     },
                     {
                         label: "Finish",
-                        type: "number",
+                        type: "number-draggable",
                         min: -180,
                         max: 180,
                         step: 1,
@@ -1089,7 +1100,7 @@ const GROUPS = [
             },
             {
                 label: "Scale",
-                type: "number",
+                type: "number-draggable",
                 defaultValue: 100,
                 unit: "%",
                 buttons: [ { id: "rescale", label: "Rescale", className: "blue", onClick: rescaleDimensions }, 
@@ -1131,14 +1142,14 @@ const GROUPS = [
             },
             {
                 label: "Clone Lifetime",
-                type: "number",
+                type: "number-draggable",
                 unit: "s",
                 propertyID: "cloneLifetime",
                 showPropertyRule: { "cloneable": "true" },
             },
             {
                 label: "Clone Limit",
-                type: "number",
+                type: "number-draggable",
                 propertyID: "cloneLimit",
                 showPropertyRule: { "cloneable": "true" },
             },
@@ -1181,6 +1192,7 @@ const GROUPS = [
                 buttons: [ { id: "reload", label: "F", className: "glyph", onClick: reloadScripts } ],
                 propertyID: "script",
                 placeholder: "URL",
+                hideIfCertified: true,
             },
             {
                 label: "Server Script",
@@ -1197,7 +1209,7 @@ const GROUPS = [
             },
             {
                 label: "Lifetime",
-                type: "string",
+                type: "number",
                 unit: "s",
                 propertyID: "lifetime",
             },
@@ -1267,6 +1279,7 @@ const GROUPS = [
                 placeholder: "URL",
                 propertyID: "collisionSoundURL",
                 showPropertyRule: { "collisionless": "false" },
+                hideIfCertified: true,
             },
             {
                 label: "Dynamic",
@@ -1291,7 +1304,7 @@ const GROUPS = [
             },
             {
                 label: "Linear Damping",
-                type: "number",
+                type: "number-draggable",
                 min: 0,
                 max: 1,
                 step: 0.01,
@@ -1310,7 +1323,7 @@ const GROUPS = [
             },
             {
                 label: "Angular Damping",
-                type: "number",
+                type: "number-draggable",
                 min: 0,
                 max: 1,
                 step: 0.01,
@@ -1319,7 +1332,7 @@ const GROUPS = [
             },
             {
                 label: "Bounciness",
-                type: "number",
+                type: "number-draggable",
                 min: 0,
                 max: 1,
                 step: 0.01,
@@ -1328,7 +1341,7 @@ const GROUPS = [
             },
             {
                 label: "Friction",
-                type: "number",
+                type: "number-draggable",
                 min: 0,
                 max: 10,
                 step: 0.1,
@@ -1337,7 +1350,7 @@ const GROUPS = [
             },
             {
                 label: "Density",
-                type: "number",
+                type: "number-draggable",
                 min: 100,
                 max: 10000,
                 step: 1,
@@ -1431,13 +1444,13 @@ const TEXTURE_ELEMENTS = {
 
 const JSON_EDITOR_ROW_DIV_INDEX = 2;
 
-var elGroups = {};
-var properties = {};
-var colorPickers = {};
-var particlePropertyUpdates = {};
-var selectedEntityProperties;
-var lastEntityID = null;
-var createAppTooltip = new CreateAppTooltip();
+let elGroups = {};
+let properties = {};
+let colorPickers = {};
+let particlePropertyUpdates = {};
+let selectedEntityProperties;
+let lastEntityID = null;
+let createAppTooltip = new CreateAppTooltip();
 let currentSpaceMode = PROPERTY_SPACE_MODE.LOCAL;
 
 function createElementFromHTML(htmlString) {
@@ -1454,12 +1467,13 @@ function getPropertyInputElement(propertyID) {
     let property = properties[propertyID];          
     switch (property.data.type) {
         case 'string':
+        case 'number':
         case 'bool':
         case 'dropdown':
         case 'textarea':
         case 'texture':
             return property.elInput;
-        case 'number':
+        case 'number-draggable':
             return property.elNumber.elInput;
         case 'vec3': 
         case 'vec2':
@@ -1529,15 +1543,20 @@ function resetProperties() {
         let propertyData = property.data;
         
         switch (propertyData.type) {
+            case 'number':
             case 'string': {
-                property.elInput.value = "";
+                if (propertyData.defaultValue !== undefined) {
+                    property.elInput.value = propertyData.defaultValue;
+                } else {
+                    property.elInput.value = "";
+                }
                 break;
             }
             case 'bool': {
                 property.elInput.checked = false;
                 break;
             }
-            case 'number': {
+            case 'number-draggable': {
                 if (propertyData.defaultValue !== undefined) {
                     property.elNumber.setValue(propertyData.defaultValue);
                 } else { 
@@ -1691,7 +1710,7 @@ function updateProperty(originalPropertyName, propertyValue, isParticleProperty)
     }
 }
 
-var particleSyncDebounce = _.debounce(function () {
+let particleSyncDebounce = _.debounce(function () {
     updateProperties(particlePropertyUpdates);
     particlePropertyUpdates = {};
 }, DEBOUNCE_TIMEOUT);
@@ -1825,7 +1844,7 @@ function createStringProperty(property, elProperty) {
                type="text"
                ${propertyData.placeholder ? 'placeholder="' + propertyData.placeholder + '"' : ''}
                ${propertyData.readOnly ? 'readonly' : ''}></input>
-        `)
+        `);
 
     
     elInput.addEventListener('change', createEmitTextPropertyUpdateFunction(property));
@@ -1873,7 +1892,45 @@ function createBoolProperty(property, elProperty) {
     return elInput;
 }
 
-function createNumberProperty(property, elProperty) { 
+function createNumberProperty(property, elProperty) {
+    let elementID = property.elementID;
+    let propertyData = property.data;
+
+    elProperty.className = "text";
+
+    let elInput = createElementFromHTML(`
+        <input id="${elementID}"
+               class='hide-spinner'
+               type="number"
+               ${propertyData.placeholder ? 'placeholder="' + propertyData.placeholder + '"' : ''}
+               ${propertyData.readOnly ? 'readonly' : ''}></input>
+        `)
+
+    if (propertyData.min !== undefined) {
+        elInput.setAttribute("min", propertyData.min);
+    }
+    if (propertyData.max !== undefined) {
+        elInput.setAttribute("max", propertyData.max);
+    }
+    if (propertyData.step !== undefined) {
+        elInput.setAttribute("step", propertyData.step);
+    }
+    if (propertyData.defaultValue !== undefined) {
+        elInput.value = propertyData.defaultValue;
+    }
+
+    elInput.addEventListener('change', createEmitNumberPropertyUpdateFunction(property));
+
+    elProperty.appendChild(elInput);
+
+    if (propertyData.buttons !== undefined) {
+        addButtons(elProperty, elementID, propertyData.buttons, false);
+    }
+
+    return elInput;
+}
+
+function createNumberDraggableProperty(property, elProperty) { 
     let elementID = property.elementID;
     let propertyData = property.data;
     
@@ -2217,7 +2274,11 @@ function createProperty(propertyData, propertyElementID, propertyName, propertyI
             break;
         }
         case 'number': {
-            property.elNumber = createNumberProperty(property, elProperty);
+            property.elInput = createNumberProperty(property, elProperty);
+            break;
+        }
+        case 'number-draggable': {
+            property.elNumber = createNumberDraggableProperty(property, elProperty);
             break;
         }
         case 'vec3': {
@@ -2362,31 +2423,41 @@ function saveUserData() {
     saveJSONUserData(true);
 }
 
+function setJSONError(property, isError) {
+    $("#property-"+ property + "-editor").toggleClass('error', isError);
+    let $propertyUserDataEditorStatus = $("#property-"+ property + "-editorStatus");
+    $propertyUserDataEditorStatus.css('display', isError ? 'block' : 'none');
+    $propertyUserDataEditorStatus.text(isError ? 'Invalid JSON code - look for red X in your code' : '');
+}
+
 function setUserDataFromEditor(noUpdate) {
     let json = null;
+    let errorFound = false;
     try {
         json = editor.get();
     } catch (e) {
-        alert('Invalid JSON code - look for red X in your code ', +e);
+        errorFound = true;
     }
-    if (json === null) {
+
+    setJSONError('userData', errorFound);
+
+    if (errorFound) {
         return;
+    }
+
+    let text = editor.getText();
+    if (noUpdate) {
+        EventBridge.emitWebEvent(
+            JSON.stringify({
+                id: lastEntityID,
+                type: "saveUserData",
+                properties: {
+                    userData: text
+                }
+            })
+        );
     } else {
-        let text = editor.getText();
-        if (noUpdate === true) {
-            EventBridge.emitWebEvent(
-                JSON.stringify({
-                    id: lastEntityID,
-                    type: "saveUserData",
-                    properties: {
-                        userData: text
-                    }
-                })
-            );
-            return;
-        } else {
-            updateProperty('userData', text, false);
-        }
+        updateProperty('userData', text, false);
     }
 }
 
@@ -2445,7 +2516,7 @@ function multiDataUpdater(groupName, updateKeyPair, userDataElement, defaults, r
     updateProperties(propertyUpdate, false);
 }
 
-var editor = null;
+let editor = null;
 
 function createJSONEditor() {
     let container = document.getElementById("property-userData-editor");
@@ -2508,9 +2579,10 @@ function hideUserDataSaved() {
 
 function showStaticUserData() {
     if (editor !== null) {
-        $('#property-userData-static').show();
-        $('#property-userData-static').css('height', $('#property-userData-editor').height());
-        $('#property-userData-static').text(editor.getText());
+        let $propertyUserDataStatic = $('#property-userData-static');
+        $propertyUserDataStatic.show();
+        $propertyUserDataStatic.css('height', $('#property-userData-editor').height());
+        $propertyUserDataStatic.text(editor.getText());
     }
 }
 
@@ -2531,12 +2603,13 @@ function getEditorJSON() {
 
 function deleteJSONEditor() {
     if (editor !== null) {
+        setJSONError('userData', false);
         editor.destroy();
         editor = null;
     }
 }
 
-var savedJSONTimer = null;
+let savedJSONTimer = null;
 
 function saveJSONUserData(noUpdate) {
     setUserDataFromEditor(noUpdate);
@@ -2581,33 +2654,35 @@ function saveMaterialData() {
 
 function setMaterialDataFromEditor(noUpdate) {
     let json = null;
+    let errorFound = false;
     try {
         json = materialEditor.get();
     } catch (e) {
-        alert('Invalid JSON code - look for red X in your code ', +e);
+        errorFound = true;
     }
-    if (json === null) {
+
+    setJSONError('materialData', errorFound);
+
+    if (errorFound) {
         return;
+    }
+    let text = materialEditor.getText();
+    if (noUpdate) {
+        EventBridge.emitWebEvent(
+            JSON.stringify({
+                id: lastEntityID,
+                type: "saveMaterialData",
+                properties: {
+                    materialData: text
+                }
+            })
+        );
     } else {
-        let text = materialEditor.getText();
-        if (noUpdate === true) {
-            EventBridge.emitWebEvent(
-                JSON.stringify({
-                    id: lastEntityID,
-                    type: "saveMaterialData",
-                    properties: {
-                        materialData: text
-                    }
-                })
-            );
-            return;
-        } else {
-            updateProperty('materialData', text, false);
-        }
+        updateProperty('materialData', text, false);
     }
 }
 
-var materialEditor = null;
+let materialEditor = null;
 
 function createJSONMaterialEditor() {
     let container = document.getElementById("property-materialData-editor");
@@ -2670,9 +2745,10 @@ function hideMaterialDataSaved() {
 
 function showStaticMaterialData() {
     if (materialEditor !== null) {
-        $('#property-materialData-static').show();
-        $('#property-materialData-static').css('height', $('#property-materialData-editor').height());
-        $('#property-materialData-static').text(materialEditor.getText());
+        let $propertyMaterialDataStatic = $('#property-materialData-static');
+        $propertyMaterialDataStatic.show();
+        $propertyMaterialDataStatic.css('height', $('#property-materialData-editor').height());
+        $propertyMaterialDataStatic.text(materialEditor.getText());
     }
 }
 
@@ -2693,12 +2769,13 @@ function getMaterialEditorJSON() {
 
 function deleteJSONMaterialEditor() {
     if (materialEditor !== null) {
+        setJSONError('materialData', false);
         materialEditor.destroy();
         materialEditor = null;
     }
 }
 
-var savedMaterialJSONTimer = null;
+let savedMaterialJSONTimer = null;
 
 function saveJSONMaterialData(noUpdate) {
     setMaterialDataFromEditor(noUpdate);
@@ -2872,23 +2949,20 @@ function loaded() {
                         elGroup.appendChild(elContainer);
                     }
 
-                    elLabel = document.createElement('label');
-                    elLabel.setAttribute("for", propertyElementID);
+                    let labelText = propertyData.label !== undefined ? propertyData.label : "";
+                    let className = '';
                     if (propertyData.indentedLabel || propertyData.showPropertyRule !== undefined) {
-                        let elSpan = document.createElement('span');
-                        elSpan.className = 'indented';
-                        elSpan.innerText = propertyData.label !== undefined ? propertyData.label : "";
-                        elLabel.appendChild(elSpan);
-                    } else {
-                        elLabel.innerText = propertyData.label !== undefined ? propertyData.label : "";
+                        className = 'indented';
                     }
+                    elLabel = createElementFromHTML(
+                        `<label><span class="${className}">${labelText}</span></label>`);
                     elContainer.appendChild(elLabel);
                 } else {
                     elContainer = document.getElementById(propertyData.replaceID);
                 }
 
                 if (elLabel) {
-                    createAppTooltip.registerTooltipElement(elLabel, propertyID);
+                    createAppTooltip.registerTooltipElement(elLabel.childNodes[0], propertyID);
                 }
 
                 let elProperty = createElementFromHTML('<div style="width: 100%;"></div>');
@@ -2912,7 +2986,10 @@ function loaded() {
                         property.elContainer = elContainer;
                         property.spaceMode = propertySpaceMode;
 
-                        elWrapper.appendChild(createElementFromHTML(`<div class="triple-label">${innerPropertyData.label}</div>`));
+                        let elLabel = createElementFromHTML(`<div class="triple-label">${innerPropertyData.label}</div>`);
+                        createAppTooltip.registerTooltipElement(elLabel, propertyID);
+
+                        elWrapper.appendChild(elLabel);
                         
                         if (property.type !== 'placeholder') {
                             properties[propertyID] = property;
@@ -2958,7 +3035,7 @@ function loaded() {
                     let elServerScriptError = document.getElementById("property-serverScripts-error");
                     let elServerScriptStatus = document.getElementById("property-serverScripts-status");
                     elServerScriptError.value = data.errorInfo;
-                    // If we just set elServerScriptError's diplay to block or none, we still end up with
+                    // If we just set elServerScriptError's display to block or none, we still end up with
                     // it's parent contributing 21px bottom padding even when elServerScriptError is display:none.
                     // So set it's parent to block or none
                     elServerScriptError.parentElement.style.display = data.errorInfo ? "block" : "none";
@@ -3068,6 +3145,15 @@ function loaded() {
 
                         showGroupsForType(selectedEntityProperties.type);
                         
+                        if (selectedEntityProperties.locked) {
+                            disableProperties();
+                            getPropertyInputElement("locked").removeAttribute('disabled');
+                        } else {
+                            enableProperties();
+                            disableSaveUserDataButton();
+                            disableSaveMaterialDataButton()
+                        }
+                        
                         for (let propertyID in properties) {
                             let property = properties[propertyID];
                             let propertyData = property.data;
@@ -3078,10 +3164,19 @@ function loaded() {
                             if (propertyValue === undefined && !isSubProperty) {
                                 continue;
                             }
+
+                            if (propertyData.hideIfCertified) {
+                                let shouldHide = selectedEntityProperties.certificateID !== "";
+                                if (shouldHide) {
+                                    propertyValue = "** Certified **";
+                                }
+                                property.elInput.disabled = shouldHide;
+                            }
                             
                             let isPropertyNotNumber = false;
                             switch (propertyData.type) {
                                 case 'number':
+                                case 'number-draggable':
                                     isPropertyNotNumber = isNaN(propertyValue) || propertyValue === null;
                                     break;
                                 case 'vec3':
@@ -3114,6 +3209,10 @@ function loaded() {
                                     break;
                                 }
                                 case 'number': {
+                                    property.elInput.value = propertyValue;
+                                    break;
+                                }
+                                case 'number-draggable': {
                                     let multiplier = propertyData.multiplier !== undefined ? propertyData.multiplier : 1;
                                     let value = propertyValue / multiplier;
                                     if (propertyData.round !== undefined) {
@@ -3256,15 +3355,6 @@ function loaded() {
                             hideMaterialDataSaved();
                         }
                         
-                        if (selectedEntityProperties.locked) {
-                            disableProperties();
-                            getPropertyInputElement("locked").removeAttribute('disabled');
-                        } else {
-                            enableProperties();
-                            disableSaveUserDataButton();
-                            disableSaveMaterialDataButton()
-                        }
-                        
                         let activeElement = document.activeElement;
                         if (doSelectElement && typeof activeElement.select !== "undefined") {
                             activeElement.select();
@@ -3317,12 +3407,15 @@ function loaded() {
         elStaticUserData.setAttribute("id", userDataElementID + "-static");
         let elUserDataEditor = document.createElement('div');
         elUserDataEditor.setAttribute("id", userDataElementID + "-editor");
+        let elUserDataEditorStatus = document.createElement('div');
+        elUserDataEditorStatus.setAttribute("id", userDataElementID + "-editorStatus");
         let elUserDataSaved = document.createElement('span');
         elUserDataSaved.setAttribute("id", userDataElementID + "-saved");
         elUserDataSaved.innerText = "Saved!";
         elDiv.childNodes[JSON_EDITOR_ROW_DIV_INDEX].appendChild(elUserDataSaved);
         elDiv.insertBefore(elStaticUserData, elUserData);
         elDiv.insertBefore(elUserDataEditor, elUserData);
+        elDiv.insertBefore(elUserDataEditorStatus, elUserData);
         
         // Material Data
         let materialDataProperty = properties["materialData"];
@@ -3333,12 +3426,15 @@ function loaded() {
         elStaticMaterialData.setAttribute("id", materialDataElementID + "-static");
         let elMaterialDataEditor = document.createElement('div');
         elMaterialDataEditor.setAttribute("id", materialDataElementID + "-editor");
+        let elMaterialDataEditorStatus = document.createElement('div');
+        elMaterialDataEditorStatus.setAttribute("id", materialDataElementID + "-editorStatus");
         let elMaterialDataSaved = document.createElement('span');
         elMaterialDataSaved.setAttribute("id", materialDataElementID + "-saved");
         elMaterialDataSaved.innerText = "Saved!";
         elDiv.childNodes[JSON_EDITOR_ROW_DIV_INDEX].appendChild(elMaterialDataSaved);
         elDiv.insertBefore(elStaticMaterialData, elMaterialData);
         elDiv.insertBefore(elMaterialDataEditor, elMaterialData);
+        elDiv.insertBefore(elMaterialDataEditorStatus, elMaterialData);
         
         // Special Property Callbacks
         let elParentMaterialNameString = getPropertyInputElement("materialNameToReplace");
@@ -3529,6 +3625,7 @@ function loaded() {
     });
 
     augmentSpinButtons();
+    disableDragDrop();
 
     // Disable right-click context menu which is not visible in the HMD and makes it seem like the app has locked
     document.addEventListener("contextmenu", function(event) {
diff --git a/scripts/system/html/js/gridControls.js b/scripts/system/html/js/gridControls.js
index 3e5bfa1e2f..e27dac522b 100644
--- a/scripts/system/html/js/gridControls.js
+++ b/scripts/system/html/js/gridControls.js
@@ -108,6 +108,7 @@ function loaded() {
         });
 
         augmentSpinButtons();
+        disableDragDrop();
 
         EventBridge.emitWebEvent(JSON.stringify({ type: 'init' }));
     });
diff --git a/scripts/system/html/js/listView.js b/scripts/system/html/js/listView.js
index 49a91388a5..eec3f833ad 100644
--- a/scripts/system/html/js/listView.js
+++ b/scripts/system/html/js/listView.js
@@ -9,10 +9,6 @@
 const SCROLL_ROWS = 2; // number of rows used as scrolling buffer, each time we pass this number of rows we scroll
 const FIRST_ROW_INDEX = 2; // the first elRow element's index in the child nodes of the table body
 
-debugPrint = function (message) {
-    console.log(message);
-};
-
 function ListView(elTableBody, elTableScroll, elTableHeaderRow, createRowFunction, updateRowFunction, clearRowFunction,
                   preRefreshFunction, postRefreshFunction, preResizeFunction, WINDOW_NONVARIABLE_HEIGHT) {
     this.elTableBody = elTableBody;
@@ -246,7 +242,7 @@ ListView.prototype = {
 
     resize: function() {        
         if (!this.elTableBody || !this.elTableScroll) {
-            debugPrint("ListView.resize - no valid table body or table scroll element");
+            console.log("ListView.resize - no valid table body or table scroll element");
             return;
         }
         this.preResizeFunction();
@@ -288,7 +284,7 @@ ListView.prototype = {
     
     initialize: function() {
         if (!this.elTableBody || !this.elTableScroll) {
-            debugPrint("ListView.initialize - no valid table body or table scroll element");
+            console.log("ListView.initialize - no valid table body or table scroll element");
             return;
         }
         
diff --git a/scripts/system/html/js/utils.js b/scripts/system/html/js/utils.js
new file mode 100644
index 0000000000..d61b4d1762
--- /dev/null
+++ b/scripts/system/html/js/utils.js
@@ -0,0 +1,27 @@
+//
+//  utils.js
+//
+//  Created by David Back on 19 Nov 2018
+//  Copyright 2016 High Fidelity, Inc.
+//
+//  Distributed under the Apache License, Version 2.0.
+//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
+//
+
+function disableDragDrop() {
+    document.addEventListener("drop", function(event) {
+        event.preventDefault();
+    });
+    
+    document.addEventListener("dragover", function(event) {
+        event.dataTransfer.effectAllowed = "none";
+        event.dataTransfer.dropEffect = "none";
+        event.preventDefault();
+    });
+    
+    document.addEventListener("dragenter", function(event) {
+        event.dataTransfer.effectAllowed = "none";
+        event.dataTransfer.dropEffect = "none";
+        event.preventDefault();
+    }, false);
+}
diff --git a/scripts/system/libraries/entityList.js b/scripts/system/libraries/entityList.js
index eeb16fd60d..f27ab6caf2 100644
--- a/scripts/system/libraries/entityList.js
+++ b/scripts/system/libraries/entityList.js
@@ -164,7 +164,7 @@ EntityListTool = function(shouldUseEditTabletApp) {
             var cameraPosition = Camera.position;
             PROFILE("getMultipleProperties", function () {
                 var multipleProperties = Entities.getMultipleEntityProperties(ids, ['name', 'type', 'locked',
-                    'visible', 'renderInfo', 'modelURL', 'materialURL', 'script']);
+                    'visible', 'renderInfo', 'modelURL', 'materialURL', 'script', 'certificateID']);
                 for (var i = 0; i < multipleProperties.length; i++) {
                     var properties = multipleProperties[i];
 
@@ -182,6 +182,7 @@ EntityListTool = function(shouldUseEditTabletApp) {
                             url: url,
                             locked: properties.locked,
                             visible: properties.visible,
+                            certificateID: properties.certificateID,
                             verticesCount: (properties.renderInfo !== undefined ?
                                 valueIfDefined(properties.renderInfo.verticesCount) : ""),
                             texturesCount: (properties.renderInfo !== undefined ?