diff --git a/examples/dice.js b/examples/dice.js
index b0021ecebb..2aefcf90fe 100644
--- a/examples/dice.js
+++ b/examples/dice.js
@@ -45,6 +45,9 @@ var diceButton = Overlays.addOverlay("image", {
 
 var GRAVITY = -3.5;
 var LIFETIME = 300;
+// NOTE: angularVelocity is in radians/sec
+var MAX_ANGULAR_SPEED = Math.PI;
+
 function shootDice(position, velocity) {
     for (var i = 0; i < NUMBER_OF_DICE; i++) {
         dice.push(Entities.addEntity(
@@ -53,9 +56,7 @@ function shootDice(position, velocity) {
           position: position,  
           velocity: velocity, 
           rotation: Quat.fromPitchYawRollDegrees(Math.random() * 360, Math.random() * 360, Math.random() * 360),
-          // NOTE: angularVelocity is in radians/sec
-          var maxAngularSpeed = Math.PI;
-          angularVelocity: { x: Math.random() * maxAngularSpeed, y: Math.random() * maxAngularSpeed, z: Math.random() * maxAngularSpeed },
+          angularVelocity: { x: Math.random() * MAX_ANGULAR_SPEED, y: Math.random() * MAX_ANGULAR_SPEED, z: Math.random() * MAX_ANGULAR_SPEED },
           lifetime: LIFETIME,
           gravity: {  x: 0, y: GRAVITY, z: 0 },
           shapeType: "box",
diff --git a/examples/example/entities/makeHouses.js b/examples/example/entities/makeHouses.js
index 37bc1d5a8e..d49f737880 100644
--- a/examples/example/entities/makeHouses.js
+++ b/examples/example/entities/makeHouses.js
@@ -70,6 +70,7 @@
     var rotOdd = Quat.fromPitchYawRollDegrees(0, 90.0 + MyAvatar.bodyYaw, 0.0);
     var housePos = Vec3.sum(MyAvatar.position, Quat.getFront(Camera.getOrientation()));
 
+    var housePositions = []
     for (var j = 0; j < measures.rows; j++) {
 
         var posX1 = 0 - (xRange / 2);
@@ -87,11 +88,8 @@
                 y: 0,
                 z: dd
             };
-
-            print("House nr.:" + (houses.length + 1));
-            houses.push(
-                addHouseAt(Vec3.sum(housePos, posShift), (j % 2 == 0) ? rotEven : rotOdd)
-            );
+            
+            housePositions.push(Vec3.sum(housePos, posShift));
             posX1 += measures.parcelWidth;
         }
     }
@@ -144,14 +142,21 @@
         };
     }
 
-    function cleanup() {
-        while (houses.length > 0) {
-            if (!houses[0].isKnownID) {
-                houses[0] = Entities.identifyEntity(houses[0]);
-            }
-            Entities.deleteEntity(houses.shift());
+    var addHouses = function() {
+        if (housePositions.length > 0) {
+            position = housePositions.pop();
+            print("House nr.:" + (houses.length + 1));
+            houses.push(
+                addHouseAt(position, (housePositions.length % 2 == 0) ? rotEven : rotOdd)
+            );
+            
+            // max 20 per second
+            Script.setTimeout(addHouses, 50);
+        } else {
+            Script.stop();
         }
-    }
-
-    Script.scriptEnding.connect(cleanup);
+    };
+    
+    addHouses();
+    
 })();
diff --git a/interface/src/Application.cpp b/interface/src/Application.cpp
index 549f05a905..eb427737e1 100644
--- a/interface/src/Application.cpp
+++ b/interface/src/Application.cpp
@@ -76,7 +76,7 @@
 #include <PhysicsEngine.h>
 #include <ProgramObject.h>
 #include <ResourceCache.h>
-//#include <ScriptCache.h>
+#include <ScriptCache.h>
 #include <SettingHandle.h>
 #include <SoundCache.h>
 #include <TextRenderer.h>
@@ -221,7 +221,7 @@ bool setupEssentials(int& argc, char** argv) {
     auto addressManager = DependencyManager::set<AddressManager>();
     auto nodeList = DependencyManager::set<NodeList>(NodeType::Agent, listenPort);
     auto geometryCache = DependencyManager::set<GeometryCache>();
-    //auto scriptCache = DependencyManager::set<ScriptCache>();
+    auto scriptCache = DependencyManager::set<ScriptCache>();
     auto soundCache = DependencyManager::set<SoundCache>();
     auto glowEffect = DependencyManager::set<GlowEffect>();
     auto faceshift = DependencyManager::set<Faceshift>();
@@ -620,7 +620,7 @@ Application::~Application() {
     DependencyManager::destroy<AnimationCache>();
     DependencyManager::destroy<TextureCache>();
     DependencyManager::destroy<GeometryCache>();
-    //DependencyManager::destroy<ScriptCache>();
+    DependencyManager::destroy<ScriptCache>();
     DependencyManager::destroy<SoundCache>();
     
     QThread* nodeThread = DependencyManager::get<NodeList>()->thread();
@@ -1524,7 +1524,7 @@ void Application::idle() {
     }
 
     // Normally we check PipelineWarnings, but since idle will often take more than 10ms we only show these idle timing
-    // details if we're in ExtraDebugging mode. However, the ::update() and it's subcomponents will show their timing
+    // details if we're in ExtraDebugging mode. However, the ::update() and its subcomponents will show their timing
     // details normally.
     bool showWarnings = getLogger()->extraDebugging();
     PerformanceWarning warn(showWarnings, "idle()");
@@ -2540,7 +2540,7 @@ bool Application::isHMDMode() const {
 QRect Application::getDesirableApplicationGeometry() {
     QRect applicationGeometry = getWindow()->geometry();
     
-    // If our parent window is on the HMD, then don't use it's geometry, instead use
+    // If our parent window is on the HMD, then don't use its geometry, instead use
     // the "main screen" geometry.
     HMDToolsDialog* hmdTools = DependencyManager::get<DialogsManager>()->getHMDToolsDialog();
     if (hmdTools && hmdTools->hasHMDScreen()) {
@@ -3376,7 +3376,7 @@ void Application::nodeKilled(SharedNodePointer node) {
 
 void Application::trackIncomingOctreePacket(const QByteArray& packet, const SharedNodePointer& sendingNode, bool wasStatsPacket) {
 
-    // Attempt to identify the sender from it's address.
+    // Attempt to identify the sender from its address.
     if (sendingNode) {
         QUuid nodeUUID = sendingNode->getUUID();
 
@@ -3445,7 +3445,7 @@ int Application::parseOctreeStats(const QByteArray& packet, const SharedNodePoin
         }
         // store jurisdiction details for later use
         // This is bit of fiddling is because JurisdictionMap assumes it is the owner of the values used to construct it
-        // but OctreeSceneStats thinks it's just returning a reference to it's contents. So we need to make a copy of the
+        // but OctreeSceneStats thinks it's just returning a reference to its contents. So we need to make a copy of the
         // details from the OctreeSceneStats to construct the JurisdictionMap
         JurisdictionMap jurisdictionMap;
         jurisdictionMap.copyContents(temp.getJurisdictionRoot(), temp.getJurisdictionEndNodes());
@@ -3665,17 +3665,56 @@ bool Application::askToSetAvatarUrl(const QString& url) {
         msgBox.exec();
         return false;
     }
-
-    QString message = "Would you like to use this model for part of avatar:\n" + url;
+    
+    // Download the FST file, to attempt to determine its model type
+    QNetworkAccessManager& networkAccessManager = NetworkAccessManager::getInstance();
+    QNetworkRequest networkRequest = QNetworkRequest(url);
+    networkRequest.setHeader(QNetworkRequest::UserAgentHeader, HIGH_FIDELITY_USER_AGENT);
+    QNetworkReply* reply = networkAccessManager.get(networkRequest);
+    qDebug() << "Downloading avatar file at " << url;
+    QEventLoop loop;
+    QObject::connect(reply, &QNetworkReply::finished, &loop, &QEventLoop::quit);
+    loop.exec();
+    QByteArray fstContents = reply->readAll();
+    delete reply;
+    QVariantHash fstMapping = FSTReader::readMapping(fstContents);
+    
+    FSTReader::ModelType modelType = FSTReader::predictModelType(fstMapping);
+    
     QMessageBox msgBox;
-
     msgBox.setIcon(QMessageBox::Question);
     msgBox.setWindowTitle("Set Avatar");
-    msgBox.setText(message);
+    QPushButton* headButton = NULL;
+    QPushButton* bodyButton = NULL;
+    QPushButton* bodyAndHeadButton = NULL;
+    
+    QString message;
+    QString typeInfo;
+    switch (modelType) {
+        case FSTReader::HEAD_MODEL:
+            message = QString("Would you like to use '") + fstMapping["name"].toString() + QString("' for your avatar head?");
+            headButton = msgBox.addButton(tr("Yes"), QMessageBox::ActionRole);
+        break;
 
-    QPushButton* headButton = msgBox.addButton(tr("Head"), QMessageBox::ActionRole);
-    QPushButton* bodyButton = msgBox.addButton(tr("Body"), QMessageBox::ActionRole);
-    QPushButton* bodyAndHeadButton = msgBox.addButton(tr("Body + Head"), QMessageBox::ActionRole);
+        case FSTReader::BODY_ONLY_MODEL:
+            message = QString("Would you like to use '") + fstMapping["name"].toString() + QString("' for your avatar body?");
+            bodyButton = msgBox.addButton(tr("Yes"), QMessageBox::ActionRole);
+        break;
+
+        case FSTReader::HEAD_AND_BODY_MODEL:
+            message = QString("Would you like to use '") + fstMapping["name"].toString() + QString("' for your avatar?");
+            bodyAndHeadButton = msgBox.addButton(tr("Yes"), QMessageBox::ActionRole);
+        break;
+        
+        default:
+            message = QString("Would you like to use '") + fstMapping["name"].toString() + QString("' for some part of your avatar head?");
+            headButton = msgBox.addButton(tr("Use for Head"), QMessageBox::ActionRole);
+            bodyButton = msgBox.addButton(tr("Use for Body"), QMessageBox::ActionRole);
+            bodyAndHeadButton = msgBox.addButton(tr("Use for Body and Head"), QMessageBox::ActionRole);
+        break;
+    }
+
+    msgBox.setText(message);
     msgBox.addButton(QMessageBox::Cancel);
 
     msgBox.exec();
@@ -3688,6 +3727,11 @@ bool Application::askToSetAvatarUrl(const QString& url) {
     } else if (msgBox.clickedButton() == bodyButton) {
         qDebug() << "Chose to use for body: " << url;
         _myAvatar->setSkeletonModelURL(url);
+        // if the head is empty, reset it to the default head.
+        if (_myAvatar->getFaceModelURLString().isEmpty()) {
+            _myAvatar->setFaceModelURL(DEFAULT_HEAD_MODEL_URL);
+            UserActivityLogger::getInstance().changedModel("head", DEFAULT_HEAD_MODEL_URL.toString());
+        }
         UserActivityLogger::getInstance().changedModel("skeleton", url);
         _myAvatar->sendIdentityPacket();
     } else if (msgBox.clickedButton() == bodyAndHeadButton) {
diff --git a/interface/src/Menu.h b/interface/src/Menu.h
index a4e644f20f..63dab63711 100644
--- a/interface/src/Menu.h
+++ b/interface/src/Menu.h
@@ -246,7 +246,7 @@ namespace MenuOption {
     const QString ToolWindow = "Tool Window";
     const QString TransmitterDrive = "Transmitter Drive";
     const QString TurnWithHead = "Turn using Head";
-    const QString PackageModel = "Package Model";
+    const QString PackageModel = "Package Model...";
     const QString Visage = "Visage";
     const QString Wireframe = "Wireframe";
 }
diff --git a/interface/src/ModelPackager.cpp b/interface/src/ModelPackager.cpp
index f552d67a98..787c21a2ef 100644
--- a/interface/src/ModelPackager.cpp
+++ b/interface/src/ModelPackager.cpp
@@ -85,7 +85,7 @@ bool ModelPackager::loadModel() {
             return false;
         }
         qDebug() << "Reading FST file : " << _modelFile.filePath();
-        _mapping = readMapping(fst.readAll());
+        _mapping = FSTReader::readMapping(fst.readAll());
         fst.close();
         
         _fbxInfo = QFileInfo(_modelFile.path() + "/" + _mapping.value(FILENAME_FIELD).toString());
@@ -119,21 +119,23 @@ bool ModelPackager::editProperties() {
         return false;
     }
     _mapping = properties.getMapping();
-    
-    // Make sure that a mapping for the root joint has been specified
-    QVariantHash joints = _mapping.value(JOINT_FIELD).toHash();
-    if (!joints.contains("jointRoot")) {
-        qWarning() << QString("%1 root joint not configured for skeleton.").arg(_modelFile.fileName());
+
+    if (_modelType == FSTReader::BODY_ONLY_MODEL || _modelType == FSTReader::HEAD_AND_BODY_MODEL) {
+        // Make sure that a mapping for the root joint has been specified
+        QVariantHash joints = _mapping.value(JOINT_FIELD).toHash();
+        if (!joints.contains("jointRoot")) {
+            qWarning() << QString("%1 root joint not configured for skeleton.").arg(_modelFile.fileName());
         
-        QString message = "Your did not configure a root joint for your skeleton model.\n\nThe upload will be canceled.";
-        QMessageBox msgBox;
-        msgBox.setWindowTitle("Model Upload");
-        msgBox.setText(message);
-        msgBox.setStandardButtons(QMessageBox::Ok);
-        msgBox.setIcon(QMessageBox::Warning);
-        msgBox.exec();
+            QString message = "Your did not configure a root joint for your skeleton model.\n\nPackaging will be canceled.";
+            QMessageBox msgBox;
+            msgBox.setWindowTitle("Model Packager");
+            msgBox.setText(message);
+            msgBox.setStandardButtons(QMessageBox::Ok);
+            msgBox.setIcon(QMessageBox::Warning);
+            msgBox.exec();
         
-        return false;
+            return false;
+        }
     }
     
     return true;
@@ -183,7 +185,7 @@ bool ModelPackager::zipModel() {
     // Copy FST
     QFile fst(tempDir.path() + "/" + nameField + ".fst");
     if (fst.open(QIODevice::WriteOnly)) {
-        fst.write(writeMapping(_mapping));
+        fst.write(FSTReader::writeMapping(_mapping));
         fst.close();
     } else {
         qDebug() << "Couldn't write FST file" << fst.fileName();
@@ -204,6 +206,18 @@ bool ModelPackager::zipModel() {
 }
 
 void ModelPackager::populateBasicMapping(QVariantHash& mapping, QString filename, const FBXGeometry& geometry) {
+
+    bool isBodyType = _modelType == FSTReader::BODY_ONLY_MODEL || _modelType == FSTReader::HEAD_AND_BODY_MODEL;
+
+    // mixamo files - in the event that a mixamo file was edited by some other tool, it's likely the applicationName will
+    // be rewritten, so we detect the existence of several different blendshapes which indicate we're likely a mixamo file
+    bool likelyMixamoFile = geometry.applicationName == "mixamo.com" ||
+                            (geometry.blendshapeChannelNames.contains("BrowsDown_Right") &&
+                             geometry.blendshapeChannelNames.contains("MouthOpen") &&
+                             geometry.blendshapeChannelNames.contains("Blink_Left") &&
+                             geometry.blendshapeChannelNames.contains("Blink_Right") &&
+                             geometry.blendshapeChannelNames.contains("Squint_Right"));
+    
     if (!mapping.contains(NAME_FIELD)) {
         mapping.insert(NAME_FIELD, QFileInfo(filename).baseName());
     }
@@ -232,39 +246,40 @@ void ModelPackager::populateBasicMapping(QVariantHash& mapping, QString filename
     if (!joints.contains("jointNeck")) {
         joints.insert("jointNeck", geometry.jointIndices.contains("jointNeck") ? "jointNeck" : "Neck");
     }
-    if (!joints.contains("jointRoot")) {
-        joints.insert("jointRoot", "Hips");
-    }
-    if (!joints.contains("jointLean")) {
-        joints.insert("jointLean", "Spine");
+    
+    if (isBodyType) {
+        if (!joints.contains("jointRoot")) {
+            joints.insert("jointRoot", "Hips");
+        }
+        if (!joints.contains("jointLean")) {
+            joints.insert("jointLean", "Spine");
+        }
+        if (!joints.contains("jointLeftHand")) {
+            joints.insert("jointLeftHand", "LeftHand");
+        }
+        if (!joints.contains("jointRightHand")) {
+            joints.insert("jointRightHand", "RightHand");
+        }
     }
+    
     if (!joints.contains("jointHead")) {
-        const char* topName = (geometry.applicationName == "mixamo.com") ? "HeadTop_End" : "HeadEnd";
+        const char* topName = likelyMixamoFile ? "HeadTop_End" : "HeadEnd";
         joints.insert("jointHead", geometry.jointIndices.contains(topName) ? topName : "Head");
     }
-    if (!joints.contains("jointLeftHand")) {
-        joints.insert("jointLeftHand", "LeftHand");
-    }
-    if (!joints.contains("jointRightHand")) {
-        joints.insert("jointRightHand", "RightHand");
-    }
+
     mapping.insert(JOINT_FIELD, joints);
-    if (!mapping.contains(FREE_JOINT_FIELD)) {
-        mapping.insertMulti(FREE_JOINT_FIELD, "LeftArm");
-        mapping.insertMulti(FREE_JOINT_FIELD, "LeftForeArm");
-        mapping.insertMulti(FREE_JOINT_FIELD, "RightArm");
-        mapping.insertMulti(FREE_JOINT_FIELD, "RightForeArm");
+
+    if (isBodyType) {
+        if (!mapping.contains(FREE_JOINT_FIELD)) {
+            mapping.insertMulti(FREE_JOINT_FIELD, "LeftArm");
+            mapping.insertMulti(FREE_JOINT_FIELD, "LeftForeArm");
+            mapping.insertMulti(FREE_JOINT_FIELD, "RightArm");
+            mapping.insertMulti(FREE_JOINT_FIELD, "RightForeArm");
+        }
     }
     
-    // mixamo blendshapes - in the event that a mixamo file was edited by some other tool, it's likely the applicationName will
-    // be rewritten, so we detect the existence of several different blendshapes which indicate we're likely a mixamo file
-    bool likelyMixamoFile = geometry.applicationName == "mixamo.com" ||
-    (geometry.blendshapeChannelNames.contains("BrowsDown_Right") &&
-     geometry.blendshapeChannelNames.contains("MouthOpen") &&
-     geometry.blendshapeChannelNames.contains("Blink_Left") &&
-     geometry.blendshapeChannelNames.contains("Blink_Right") &&
-     geometry.blendshapeChannelNames.contains("Squint_Right"));
-    
+    // If there are no blendshape mappings, and we detect that this is likely a mixamo file,
+    // then we can add the default mixamo to "faceshift" mappings
     if (!mapping.contains(BLENDSHAPE_FIELD) && likelyMixamoFile) {
         QVariantHash blendshapes;
         blendshapes.insertMulti("BrowsD_L", QVariantList() << "BrowsDown_Left" << 1.0);
diff --git a/interface/src/ModelPackager.h b/interface/src/ModelPackager.h
index 2c90395e56..c681ae436f 100644
--- a/interface/src/ModelPackager.h
+++ b/interface/src/ModelPackager.h
@@ -35,7 +35,7 @@ private:
     
     QFileInfo _modelFile;
     QFileInfo _fbxInfo;
-    ModelType _modelType;
+    FSTReader::ModelType _modelType;
     QString _texDir;
 
     QVariantHash _mapping;
diff --git a/interface/src/ModelPropertiesDialog.cpp b/interface/src/ModelPropertiesDialog.cpp
index 81fe9ce7fd..28a50205c9 100644
--- a/interface/src/ModelPropertiesDialog.cpp
+++ b/interface/src/ModelPropertiesDialog.cpp
@@ -25,7 +25,7 @@
 #include "ModelPropertiesDialog.h"
 
 
-ModelPropertiesDialog::ModelPropertiesDialog(ModelType modelType, const QVariantHash& originalMapping,
+ModelPropertiesDialog::ModelPropertiesDialog(FSTReader::ModelType modelType, const QVariantHash& originalMapping,
                                              const QString& basePath, const FBXGeometry& geometry) :
 _modelType(modelType),
 _originalMapping(originalMapping),
@@ -46,8 +46,8 @@ _geometry(geometry)
     _scale->setMaximum(FLT_MAX);
     _scale->setSingleStep(0.01);
     
-    if (_modelType != ENTITY_MODEL) {
-        if (_modelType == ATTACHMENT_MODEL) {
+    if (_modelType != FSTReader::ENTITY_MODEL) {
+        if (_modelType == FSTReader::ATTACHMENT_MODEL) {
             QHBoxLayout* translation = new QHBoxLayout();
             form->addRow("Translation:", translation);
             translation->addWidget(_translationX = createTranslationBox());
@@ -63,7 +63,7 @@ _geometry(geometry)
             form->addRow("Right Eye Joint:", _rightEyeJoint = createJointBox());
             form->addRow("Neck Joint:", _neckJoint = createJointBox());
         }
-        if (_modelType == SKELETON_MODEL) {
+        if (_modelType == FSTReader::BODY_ONLY_MODEL || _modelType == FSTReader::HEAD_AND_BODY_MODEL) {
             form->addRow("Root Joint:", _rootJoint = createJointBox());
             form->addRow("Lean Joint:", _leanJoint = createJointBox());
             form->addRow("Head Joint:", _headJoint = createJointBox());
@@ -89,8 +89,14 @@ _geometry(geometry)
     reset();
 }
 
+
+QString ModelPropertiesDialog::getType() const {
+    return FSTReader::getNameFromType(_modelType);
+}
+
 QVariantHash ModelPropertiesDialog::getMapping() const {
     QVariantHash mapping = _originalMapping;
+    mapping.insert(TYPE_FIELD, getType());
     mapping.insert(NAME_FIELD, _name->text());
     mapping.insert(TEXDIR_FIELD, _textureDirectory->text());
     mapping.insert(SCALE_FIELD, QString::number(_scale->value()));
@@ -102,9 +108,9 @@ QVariantHash ModelPropertiesDialog::getMapping() const {
     }
     mapping.insert(JOINT_INDEX_FIELD, jointIndices);
     
-    if (_modelType != ENTITY_MODEL) {
+    if (_modelType != FSTReader::ENTITY_MODEL) {
         QVariantHash joints = mapping.value(JOINT_FIELD).toHash();
-        if (_modelType == ATTACHMENT_MODEL) {
+        if (_modelType == FSTReader::ATTACHMENT_MODEL) {
             glm::vec3 pivot;
             if (_pivotAboutCenter->isChecked()) {
                 pivot = (_geometry.meshExtents.minimum + _geometry.meshExtents.maximum) * 0.5f;
@@ -121,7 +127,9 @@ QVariantHash ModelPropertiesDialog::getMapping() const {
             insertJointMapping(joints, "jointEyeRight", _rightEyeJoint->currentText());
             insertJointMapping(joints, "jointNeck", _neckJoint->currentText());
         }
-        if (_modelType == SKELETON_MODEL) {
+        
+        
+        if (_modelType == FSTReader::BODY_ONLY_MODEL || _modelType == FSTReader::HEAD_AND_BODY_MODEL) {
             insertJointMapping(joints, "jointRoot", _rootJoint->currentText());
             insertJointMapping(joints, "jointLean", _leanJoint->currentText());
             insertJointMapping(joints, "jointHead", _headJoint->currentText());
@@ -151,8 +159,8 @@ void ModelPropertiesDialog::reset() {
     
     QVariantHash jointHash = _originalMapping.value(JOINT_FIELD).toHash();
     
-    if (_modelType != ENTITY_MODEL) {
-        if (_modelType == ATTACHMENT_MODEL) {
+    if (_modelType != FSTReader::ENTITY_MODEL) {
+        if (_modelType == FSTReader::ATTACHMENT_MODEL) {
             _translationX->setValue(_originalMapping.value(TRANSLATION_X_FIELD).toDouble());
             _translationY->setValue(_originalMapping.value(TRANSLATION_Y_FIELD).toDouble());
             _translationZ->setValue(_originalMapping.value(TRANSLATION_Z_FIELD).toDouble());
@@ -164,7 +172,8 @@ void ModelPropertiesDialog::reset() {
             setJointText(_rightEyeJoint, jointHash.value("jointEyeRight").toString());
             setJointText(_neckJoint, jointHash.value("jointNeck").toString());
         }
-        if (_modelType == SKELETON_MODEL) {
+        
+        if (_modelType == FSTReader::BODY_ONLY_MODEL || _modelType == FSTReader::HEAD_AND_BODY_MODEL) {
             setJointText(_rootJoint, jointHash.value("jointRoot").toString());
             setJointText(_leanJoint, jointHash.value("jointLean").toString());
             setJointText(_headJoint, jointHash.value("jointHead").toString());
diff --git a/interface/src/ModelPropertiesDialog.h b/interface/src/ModelPropertiesDialog.h
index 5af4d173f1..11abc5ab54 100644
--- a/interface/src/ModelPropertiesDialog.h
+++ b/interface/src/ModelPropertiesDialog.h
@@ -15,6 +15,7 @@
 #include <QDialog>
 
 #include <FBXReader.h>
+#include <FSTReader.h>
 
 #include "ui/ModelsBrowser.h"
 
@@ -28,7 +29,7 @@ class ModelPropertiesDialog : public QDialog {
     Q_OBJECT
     
 public:
-    ModelPropertiesDialog(ModelType modelType, const QVariantHash& originalMapping,
+    ModelPropertiesDialog(FSTReader::ModelType modelType, const QVariantHash& originalMapping,
                           const QString& basePath, const FBXGeometry& geometry);
     
     QVariantHash getMapping() const;
@@ -43,8 +44,9 @@ private:
     QComboBox* createJointBox(bool withNone = true) const;
     QDoubleSpinBox* createTranslationBox() const;
     void insertJointMapping(QVariantHash& joints, const QString& joint, const QString& name) const;
+    QString getType() const;
     
-    ModelType _modelType;
+    FSTReader::ModelType _modelType;
     QVariantHash _originalMapping;
     QString _basePath;
     FBXGeometry _geometry;
diff --git a/interface/src/ModelSelector.cpp b/interface/src/ModelSelector.cpp
index c55d77dc00..8e130cec1a 100644
--- a/interface/src/ModelSelector.cpp
+++ b/interface/src/ModelSelector.cpp
@@ -18,8 +18,9 @@
 
 #include "ModelSelector.h"
 
-static const QString AVATAR_HEAD_STRING = "Avatar Head";
-static const QString AVATAR_BODY_STRING = "Avatar Body";
+static const QString AVATAR_HEAD_STRING = "Avatar Head Only";
+static const QString AVATAR_BODY_STRING = "Avatar Body Only";
+static const QString AVATAR_HEAD_AND_BODY_STRING = "Avatar Body with Head";
 static const QString AVATAR_ATTACHEMENT_STRING = "Avatar Attachment";
 static const QString ENTITY_MODEL_STRING = "Entity Model";
 
@@ -36,6 +37,7 @@ ModelSelector::ModelSelector() {
     _modelType = new QComboBox(this);
     _modelType->addItem(AVATAR_HEAD_STRING);
     _modelType->addItem(AVATAR_BODY_STRING);
+    _modelType->addItem(AVATAR_HEAD_AND_BODY_STRING);
     _modelType->addItem(AVATAR_ATTACHEMENT_STRING);
     _modelType->addItem(ENTITY_MODEL_STRING);
     form->addRow("Model Type:", _modelType);
@@ -50,17 +52,19 @@ QFileInfo ModelSelector::getFileInfo() const {
     return _modelFile;
 }
 
-ModelType ModelSelector::getModelType() const {
+FSTReader::ModelType ModelSelector::getModelType() const {
     QString text = _modelType->currentText();
     
     if (text == AVATAR_HEAD_STRING) {
-        return HEAD_MODEL;
+        return FSTReader::HEAD_MODEL;
     } else if (text == AVATAR_BODY_STRING) {
-        return SKELETON_MODEL;
+        return FSTReader::BODY_ONLY_MODEL;
+    } else if (text == AVATAR_HEAD_AND_BODY_STRING) {
+        return FSTReader::HEAD_AND_BODY_MODEL;
     } else if (text == AVATAR_ATTACHEMENT_STRING) {
-        return ATTACHMENT_MODEL;
+        return FSTReader::ATTACHMENT_MODEL;
     } else if (text == ENTITY_MODEL_STRING) {
-        return ENTITY_MODEL;
+        return FSTReader::ENTITY_MODEL;
     } else {
         Q_UNREACHABLE();
     }
diff --git a/interface/src/ModelSelector.h b/interface/src/ModelSelector.h
index aaa35e01c3..0ac3df5963 100644
--- a/interface/src/ModelSelector.h
+++ b/interface/src/ModelSelector.h
@@ -29,7 +29,7 @@ public:
     ModelSelector();
     
     QFileInfo getFileInfo() const;
-    ModelType getModelType() const;
+    FSTReader::ModelType getModelType() const;
     
     public slots:
     virtual void accept();
diff --git a/interface/src/scripting/WindowScriptingInterface.cpp b/interface/src/scripting/WindowScriptingInterface.cpp
index a5b8128d1e..6ed3e48274 100644
--- a/interface/src/scripting/WindowScriptingInterface.cpp
+++ b/interface/src/scripting/WindowScriptingInterface.cpp
@@ -638,7 +638,7 @@ QScriptValue WindowScriptingInterface::showBrowse(const QString& title, const QS
 /// \param const QString& nameFilter filter to filter filenames
 /// \return QScriptValue file path as a string if one was selected, otherwise `QScriptValue::NullValue`
 QScriptValue WindowScriptingInterface::showS3Browse(const QString& nameFilter) {
-    ModelsBrowser browser(ENTITY_MODEL);
+    ModelsBrowser browser(FSTReader::ENTITY_MODEL);
     if (nameFilter != "") {
         browser.setNameFilter(nameFilter);
     }
diff --git a/interface/src/ui/AttachmentsDialog.cpp b/interface/src/ui/AttachmentsDialog.cpp
index 58b46e5bbf..2a6ff2b2b1 100644
--- a/interface/src/ui/AttachmentsDialog.cpp
+++ b/interface/src/ui/AttachmentsDialog.cpp
@@ -164,7 +164,7 @@ AttachmentData AttachmentPanel::getAttachmentData() const {
 }
 
 void AttachmentPanel::chooseModelURL() {
-    ModelsBrowser modelBrowser(ATTACHMENT_MODEL, this);
+    ModelsBrowser modelBrowser(FSTReader::ATTACHMENT_MODEL, this);
     connect(&modelBrowser, SIGNAL(selected(QString)), SLOT(setModelURL(const QString&)));
     modelBrowser.browse();
 }
diff --git a/interface/src/ui/ModelsBrowser.cpp b/interface/src/ui/ModelsBrowser.cpp
index 070c6a85cc..91de4e36ac 100644
--- a/interface/src/ui/ModelsBrowser.cpp
+++ b/interface/src/ui/ModelsBrowser.cpp
@@ -28,7 +28,7 @@
 
 #include "ModelsBrowser.h"
 
-const char* MODEL_TYPE_NAMES[] = { "entities", "heads", "skeletons", "attachments" };
+const char* MODEL_TYPE_NAMES[] = { "entities", "heads", "skeletons", "skeletons", "attachments" };
 
 static const QString S3_URL = "http://s3.amazonaws.com/hifi-public";
 static const QString PUBLIC_URL = "http://public.highfidelity.io";
@@ -71,7 +71,7 @@ static const QString propertiesIds[MODEL_METADATA_COUNT] = {
     "Tags"
 };
 
-ModelsBrowser::ModelsBrowser(ModelType modelsType, QWidget* parent) :
+ModelsBrowser::ModelsBrowser(FSTReader::ModelType modelsType, QWidget* parent) :
     QWidget(parent, Qt::WindowStaysOnTopHint),
     _handler(new ModelHandler(modelsType))
 {
@@ -184,7 +184,7 @@ void ModelsBrowser::browse() {
 }
 
 
-ModelHandler::ModelHandler(ModelType modelsType, QWidget* parent) :
+ModelHandler::ModelHandler(FSTReader::ModelType modelsType, QWidget* parent) :
     QObject(parent),
     _initiateExit(false),
     _type(modelsType),
diff --git a/interface/src/ui/ModelsBrowser.h b/interface/src/ui/ModelsBrowser.h
index 0c8bb59c85..2cb3c67991 100644
--- a/interface/src/ui/ModelsBrowser.h
+++ b/interface/src/ui/ModelsBrowser.h
@@ -16,21 +16,16 @@
 #include <QStandardItemModel>
 #include <QTreeView>
 
-class QNetworkReply;
+#include <FSTReader.h>
 
-enum ModelType {
-    ENTITY_MODEL,
-    HEAD_MODEL,
-    SKELETON_MODEL,
-    ATTACHMENT_MODEL
-};
+class QNetworkReply;
 
 extern const char* MODEL_TYPE_NAMES[];
 
 class ModelHandler : public QObject {
     Q_OBJECT
 public:
-    ModelHandler(ModelType modelsType, QWidget* parent = NULL);
+    ModelHandler(FSTReader::ModelType modelsType, QWidget* parent = NULL);
     
     void lockModel() { _lock.lockForRead(); }
     QStandardItemModel* getModel() { return &_model; }
@@ -51,7 +46,7 @@ private slots:
     
 private:
     bool _initiateExit;
-    ModelType _type;
+    FSTReader::ModelType _type;
     QReadWriteLock _lock;
     QStandardItemModel _model;
     QString _nameFilter;
@@ -66,7 +61,7 @@ class ModelsBrowser : public QWidget {
     Q_OBJECT
 public:
     
-    ModelsBrowser(ModelType modelsType, QWidget* parent = NULL);
+    ModelsBrowser(FSTReader::ModelType modelsType, QWidget* parent = NULL);
     QString getSelectedFile() { return _selectedFile; }
     
 signals:
diff --git a/interface/src/ui/PreferencesDialog.cpp b/interface/src/ui/PreferencesDialog.cpp
index a07de371a2..4a9165ae44 100644
--- a/interface/src/ui/PreferencesDialog.cpp
+++ b/interface/src/ui/PreferencesDialog.cpp
@@ -67,13 +67,13 @@ void PreferencesDialog::setSkeletonUrl(QString modelUrl) {
 }
 
 void PreferencesDialog::openHeadModelBrowser() {
-    ModelsBrowser modelBrowser(HEAD_MODEL);
+    ModelsBrowser modelBrowser(FSTReader::HEAD_MODEL);
     connect(&modelBrowser, &ModelsBrowser::selected, this, &PreferencesDialog::setHeadUrl);
     modelBrowser.browse();
 }
 
 void PreferencesDialog::openBodyModelBrowser() {
-    ModelsBrowser modelBrowser(SKELETON_MODEL);
+    ModelsBrowser modelBrowser(FSTReader::HEAD_AND_BODY_MODEL);
     connect(&modelBrowser, &ModelsBrowser::selected, this, &PreferencesDialog::setSkeletonUrl);
     modelBrowser.browse();
 }
diff --git a/libraries/entities-renderer/src/EntityTreeRenderer.cpp b/libraries/entities-renderer/src/EntityTreeRenderer.cpp
index 3faa06fc53..058e02b507 100644
--- a/libraries/entities-renderer/src/EntityTreeRenderer.cpp
+++ b/libraries/entities-renderer/src/EntityTreeRenderer.cpp
@@ -110,14 +110,30 @@ void EntityTreeRenderer::shutdown() {
     _shuttingDown = true;
 }
 
+void EntityTreeRenderer::scriptContentsAvailable(const QUrl& url, const QString& scriptContents) {
+    if (_waitingOnPreload.contains(url)) {
+        QList<EntityItemID> entityIDs = _waitingOnPreload.values(url);
+        _waitingOnPreload.remove(url);
+        foreach(EntityItemID entityID, entityIDs) {
+            checkAndCallPreload(entityID);
+        } 
+    }
+}
 
-QScriptValue EntityTreeRenderer::loadEntityScript(const EntityItemID& entityItemID) {
+void EntityTreeRenderer::errorInLoadingScript(const QUrl& url) {
+    if (_waitingOnPreload.contains(url)) {
+        _waitingOnPreload.remove(url);
+    }
+}
+
+QScriptValue EntityTreeRenderer::loadEntityScript(const EntityItemID& entityItemID, bool isPreload) {
     EntityItem* entity = static_cast<EntityTree*>(_tree)->findEntityByEntityItemID(entityItemID);
-    return loadEntityScript(entity);
+    return loadEntityScript(entity, isPreload);
 }
 
 
-QString EntityTreeRenderer::loadScriptContents(const QString& scriptMaybeURLorText, bool& isURL) {
+QString EntityTreeRenderer::loadScriptContents(const QString& scriptMaybeURLorText, bool& isURL, bool& isPending, QUrl& urlOut) {
+    isPending = false;
     QUrl url(scriptMaybeURLorText);
     
     // If the url is not valid, this must be script text...
@@ -126,6 +142,7 @@ QString EntityTreeRenderer::loadScriptContents(const QString& scriptMaybeURLorTe
         return scriptMaybeURLorText;
     }
     isURL = true;
+    urlOut = url;
 
     QString scriptContents; // assume empty
     
@@ -148,20 +165,11 @@ QString EntityTreeRenderer::loadScriptContents(const QString& scriptMaybeURLorTe
                 qDebug() << "ERROR Loading file:" << fileName;
             }
         } else {
-            QNetworkAccessManager& networkAccessManager = NetworkAccessManager::getInstance();
-            QNetworkRequest networkRequest = QNetworkRequest(url);
-            networkRequest.setHeader(QNetworkRequest::UserAgentHeader, HIGH_FIDELITY_USER_AGENT);
-            QNetworkReply* reply = networkAccessManager.get(networkRequest);
-            qDebug() << "Downloading script at" << url;
-            QEventLoop loop;
-            QObject::connect(reply, SIGNAL(finished()), &loop, SLOT(quit()));
-            loop.exec();
-            if (reply->error() == QNetworkReply::NoError && reply->attribute(QNetworkRequest::HttpStatusCodeAttribute) == 200) {
-                scriptContents = reply->readAll();
-            } else {
-                qDebug() << "ERROR Loading file:" << url.toString();
+            auto scriptCache = DependencyManager::get<ScriptCache>();
+            
+            if (!scriptCache->isInBadScriptList(url)) {
+                scriptContents = scriptCache->getScript(url, this, isPending);
             }
-            delete reply;
         }
     }
     
@@ -169,7 +177,7 @@ QString EntityTreeRenderer::loadScriptContents(const QString& scriptMaybeURLorTe
 }
 
 
-QScriptValue EntityTreeRenderer::loadEntityScript(EntityItem* entity) {
+QScriptValue EntityTreeRenderer::loadEntityScript(EntityItem* entity, bool isPreload) {
     if (_shuttingDown) {
         return QScriptValue(); // since we're shutting down, we don't load any more scripts
     }
@@ -203,7 +211,24 @@ QScriptValue EntityTreeRenderer::loadEntityScript(EntityItem* entity) {
     }
     
     bool isURL = false; // loadScriptContents() will tell us if this is a URL or just text.
-    QString scriptContents = loadScriptContents(entityScript, isURL);
+    bool isPending = false;
+    QUrl url;
+    QString scriptContents = loadScriptContents(entityScript, isURL, isPending, url);
+    
+    if (isPending && isPreload && isURL) {
+        _waitingOnPreload.insert(url, entityID);
+        
+    }
+
+    auto scriptCache = DependencyManager::get<ScriptCache>();
+
+    if (isURL && scriptCache->isInBadScriptList(url)) {
+        return QScriptValue(); // no script contents...
+    }
+    
+    if (scriptContents.isEmpty()) {
+        return QScriptValue(); // no script contents...
+    }
     
     QScriptSyntaxCheckResult syntaxCheck = QScriptEngine::checkSyntax(scriptContents);
     if (syntaxCheck.state() != QScriptSyntaxCheckResult::Valid) {
@@ -211,6 +236,9 @@ QScriptValue EntityTreeRenderer::loadEntityScript(EntityItem* entity) {
         qDebug() << "   " << syntaxCheck.errorMessage() << ":"
                           << syntaxCheck.errorLineNumber() << syntaxCheck.errorColumnNumber();
         qDebug() << "    SCRIPT:" << entityScript;
+
+        scriptCache->addScriptToBadScriptList(url);
+        
         return QScriptValue(); // invalid script
     }
     
@@ -223,6 +251,9 @@ QScriptValue EntityTreeRenderer::loadEntityScript(EntityItem* entity) {
         qDebug() << "EntityTreeRenderer::loadEntityScript() entity:" << entityID;
         qDebug() << "    NOT CONSTRUCTOR";
         qDebug() << "    SCRIPT:" << entityScript;
+
+        scriptCache->addScriptToBadScriptList(url);
+
         return QScriptValue(); // invalid script
     } else {
         entityScriptConstructor = _entitiesScriptEngine->evaluate(scriptContents);
@@ -920,7 +951,7 @@ void EntityTreeRenderer::entitySciptChanging(const EntityItemID& entityID) {
 void EntityTreeRenderer::checkAndCallPreload(const EntityItemID& entityID) {
     if (_tree && !_shuttingDown) {
         // load the entity script if needed...
-        QScriptValue entityScript = loadEntityScript(entityID);
+        QScriptValue entityScript = loadEntityScript(entityID, true); // is preload!
         if (entityScript.property("preload").isValid()) {
             QScriptValueList entityArgs = createEntityArgs(entityID);
             entityScript.property("preload").call(entityScript, entityArgs);
diff --git a/libraries/entities-renderer/src/EntityTreeRenderer.h b/libraries/entities-renderer/src/EntityTreeRenderer.h
index c4aa5a42d0..12d5f6e166 100644
--- a/libraries/entities-renderer/src/EntityTreeRenderer.h
+++ b/libraries/entities-renderer/src/EntityTreeRenderer.h
@@ -16,6 +16,7 @@
 #include <EntityScriptingInterface.h> // for RayToEntityIntersectionResult
 #include <MouseEvent.h>
 #include <OctreeRenderer.h>
+#include <ScriptCache.h>
 
 class Model;
 class ScriptEngine;
@@ -31,7 +32,7 @@ public:
 };
 
 // Generic client side Octree renderer class.
-class EntityTreeRenderer : public OctreeRenderer, public EntityItemFBXService {
+class EntityTreeRenderer : public OctreeRenderer, public EntityItemFBXService, public ScriptUser {
     Q_OBJECT
 public:
     EntityTreeRenderer(bool wantScripts, AbstractViewStateInterface* viewState, 
@@ -84,6 +85,9 @@ public:
     /// hovering over, and entering entities
     void connectSignalsToSlots(EntityScriptingInterface* entityScriptingInterface);
 
+    virtual void scriptContentsAvailable(const QUrl& url, const QString& scriptContents);
+    virtual void errorInLoadingScript(const QUrl& url);
+
 signals:
     void mousePressOnEntity(const EntityItemID& entityItemID, const MouseEvent& event);
     void mouseMoveOnEntity(const EntityItemID& entityItemID, const MouseEvent& event);
@@ -138,10 +142,10 @@ private:
     ScriptEngine* _entitiesScriptEngine;
     ScriptEngine* _sandboxScriptEngine;
 
-    QScriptValue loadEntityScript(EntityItem* entity);
-    QScriptValue loadEntityScript(const EntityItemID& entityItemID);
+    QScriptValue loadEntityScript(EntityItem* entity, bool isPreload = false);
+    QScriptValue loadEntityScript(const EntityItemID& entityItemID, bool isPreload = false);
     QScriptValue getPreviouslyLoadedEntityScript(const EntityItemID& entityItemID);
-    QString loadScriptContents(const QString& scriptMaybeURLorText, bool& isURL);
+    QString loadScriptContents(const QString& scriptMaybeURLorText, bool& isURL, bool& isPending, QUrl& url);
     QScriptValueList createMouseEventArgs(const EntityItemID& entityID, QMouseEvent* event, unsigned int deviceID);
     QScriptValueList createMouseEventArgs(const EntityItemID& entityID, const MouseEvent& mouseEvent);
     
@@ -157,6 +161,8 @@ private:
     bool _dontDoPrecisionPicking;
     
     bool _shuttingDown = false;
+
+    QMultiMap<QUrl, EntityItemID> _waitingOnPreload;
     
 };
 
diff --git a/libraries/entities-renderer/src/RenderableModelEntityItem.cpp b/libraries/entities-renderer/src/RenderableModelEntityItem.cpp
index 826df45294..2b65081185 100644
--- a/libraries/entities-renderer/src/RenderableModelEntityItem.cpp
+++ b/libraries/entities-renderer/src/RenderableModelEntityItem.cpp
@@ -317,29 +317,30 @@ void RenderableModelEntityItem::computeShapeInfo(ShapeInfo& info) {
         AABox aaBox;
         _points.clear();
         unsigned int i = 0;
-        foreach (const FBXMesh& mesh, fbxGeometry.meshes) {
 
+        // the way OBJ files get read, each section under a "g" line is its own meshPart.  We only expect
+        // to find one actual "mesh" (with one or more meshParts in it), but we loop over the meshes, just in case.
+        foreach (const FBXMesh& mesh, fbxGeometry.meshes) {
+            // each meshPart is a convex hull
             foreach (const FBXMeshPart &meshPart, mesh.parts) {
                 QVector<glm::vec3> pointsInPart;
+
+                // run through all the triangles and (uniquely) add each point to the hull
                 unsigned int triangleCount = meshPart.triangleIndices.size() / 3;
                 assert((unsigned int)meshPart.triangleIndices.size() == triangleCount*3);
                 for (unsigned int j = 0; j < triangleCount; j++) {
                     unsigned int p0Index = meshPart.triangleIndices[j*3];
                     unsigned int p1Index = meshPart.triangleIndices[j*3+1];
                     unsigned int p2Index = meshPart.triangleIndices[j*3+2];
-
                     assert(p0Index < (unsigned int)mesh.vertices.size());
                     assert(p1Index < (unsigned int)mesh.vertices.size());
                     assert(p2Index < (unsigned int)mesh.vertices.size());
-
                     glm::vec3 p0 = mesh.vertices[p0Index];
                     glm::vec3 p1 = mesh.vertices[p1Index];
                     glm::vec3 p2 = mesh.vertices[p2Index];
-
                     aaBox += p0;
                     aaBox += p1;
                     aaBox += p2;
-
                     if (!pointsInPart.contains(p0)) {
                         pointsInPart << p0;
                     }
@@ -351,8 +352,44 @@ void RenderableModelEntityItem::computeShapeInfo(ShapeInfo& info) {
                     }
                 }
 
+                // run through all the quads and (uniquely) add each point to the hull
+                unsigned int quadCount = meshPart.quadIndices.size() / 4;
+                assert((unsigned int)meshPart.quadIndices.size() == quadCount*4);
+                for (unsigned int j = 0; j < quadCount; j++) {
+                    unsigned int p0Index = meshPart.quadIndices[j*4];
+                    unsigned int p1Index = meshPart.quadIndices[j*4+1];
+                    unsigned int p2Index = meshPart.quadIndices[j*4+2];
+                    unsigned int p3Index = meshPart.quadIndices[j*4+3];
+                    assert(p0Index < (unsigned int)mesh.vertices.size());
+                    assert(p1Index < (unsigned int)mesh.vertices.size());
+                    assert(p2Index < (unsigned int)mesh.vertices.size());
+                    assert(p3Index < (unsigned int)mesh.vertices.size());
+                    glm::vec3 p0 = mesh.vertices[p0Index];
+                    glm::vec3 p1 = mesh.vertices[p1Index];
+                    glm::vec3 p2 = mesh.vertices[p2Index];
+                    glm::vec3 p3 = mesh.vertices[p3Index];
+                    aaBox += p0;
+                    aaBox += p1;
+                    aaBox += p2;
+                    aaBox += p3;
+                    if (!pointsInPart.contains(p0)) {
+                        pointsInPart << p0;
+                    }
+                    if (!pointsInPart.contains(p1)) {
+                        pointsInPart << p1;
+                    }
+                    if (!pointsInPart.contains(p2)) {
+                        pointsInPart << p2;
+                    }
+                    if (!pointsInPart.contains(p3)) {
+                        pointsInPart << p3;
+                    }
+                }
+
+                // add next convex hull
                 QVector<glm::vec3> newMeshPoints;
                 _points << newMeshPoints;
+                // add points to the new convex hull
                 _points[i++] << pointsInPart;
             }
         }
@@ -362,7 +399,6 @@ void RenderableModelEntityItem::computeShapeInfo(ShapeInfo& info) {
         aaBoxDim = glm::clamp(aaBoxDim, glm::vec3(FLT_EPSILON), aaBoxDim);
 
         glm::vec3 scale = _dimensions / aaBoxDim;
-
         // multiply each point by scale before handing the point-set off to the physics engine
         for (int i = 0; i < _points.size(); i++) {
             for (int j = 0; j < _points[i].size(); j++) {
diff --git a/libraries/fbx/src/FSTReader.cpp b/libraries/fbx/src/FSTReader.cpp
index f1ffe11996..6a5cc2bd53 100644
--- a/libraries/fbx/src/FSTReader.cpp
+++ b/libraries/fbx/src/FSTReader.cpp
@@ -13,7 +13,7 @@
 
 #include "FSTReader.h"
 
-QVariantHash parseMapping(QIODevice* device) {
+QVariantHash FSTReader::parseMapping(QIODevice* device) {
     QVariantHash properties;
     
     QByteArray line;
@@ -48,13 +48,13 @@ QVariantHash parseMapping(QIODevice* device) {
     return properties;
 }
 
-QVariantHash readMapping(const QByteArray& data) {
+QVariantHash FSTReader::readMapping(const QByteArray& data) {
     QBuffer buffer(const_cast<QByteArray*>(&data));
     buffer.open(QIODevice::ReadOnly);
-    return parseMapping(&buffer);
+    return FSTReader::parseMapping(&buffer);
 }
 
-void writeVariant(QBuffer& buffer, QVariantHash::const_iterator& it) {
+void FSTReader::writeVariant(QBuffer& buffer, QVariantHash::const_iterator& it) {
     QByteArray key = it.key().toUtf8() + " = ";
     QVariantHash hashValue = it.value().toHash();
     if (hashValue.isEmpty()) {
@@ -76,8 +76,8 @@ void writeVariant(QBuffer& buffer, QVariantHash::const_iterator& it) {
     }
 }
 
-QByteArray writeMapping(const QVariantHash& mapping) {
-    static const QStringList PREFERED_ORDER = QStringList() << NAME_FIELD << SCALE_FIELD << FILENAME_FIELD
+QByteArray FSTReader::writeMapping(const QVariantHash& mapping) {
+    static const QStringList PREFERED_ORDER = QStringList() << NAME_FIELD << TYPE_FIELD << SCALE_FIELD << FILENAME_FIELD
     << TEXDIR_FIELD << JOINT_FIELD << FREE_JOINT_FIELD
     << BLENDSHAPE_FIELD << JOINT_INDEX_FIELD;
     QBuffer buffer;
@@ -96,4 +96,76 @@ QByteArray writeMapping(const QVariantHash& mapping) {
         }
     }
     return buffer.data();
-}
\ No newline at end of file
+}
+
+QHash<FSTReader::ModelType, QString> FSTReader::_typesToNames;
+QString FSTReader::getNameFromType(ModelType modelType) {
+    if (_typesToNames.size() == 0) {
+        _typesToNames[ENTITY_MODEL] = "entity";
+        _typesToNames[HEAD_MODEL] = "head";
+        _typesToNames[BODY_ONLY_MODEL] = "body";
+        _typesToNames[HEAD_AND_BODY_MODEL] = "body+head";
+        _typesToNames[ATTACHMENT_MODEL] = "attachment";
+    }
+    return _typesToNames[modelType];
+}
+
+QHash<QString, FSTReader::ModelType> FSTReader::_namesToTypes;
+FSTReader::ModelType FSTReader::getTypeFromName(const QString& name) {
+    if (_namesToTypes.size() == 0) {
+        _namesToTypes["entity"] = ENTITY_MODEL;
+        _namesToTypes["head"] = HEAD_MODEL ;
+        _namesToTypes["body"] = BODY_ONLY_MODEL;
+        _namesToTypes["body+head"] = HEAD_AND_BODY_MODEL;
+        _namesToTypes["attachment"] = ATTACHMENT_MODEL;
+    }
+    return _namesToTypes[name];
+}
+
+FSTReader::ModelType FSTReader::predictModelType(const QVariantHash& mapping) {
+
+    QVariantHash joints;
+
+    if (mapping.contains("joint") && mapping["joint"].type() == QVariant::Hash) {
+        joints = mapping["joint"].toHash();
+    }
+
+    // if the mapping includes the type hint... then we trust the mapping
+    if (mapping.contains(TYPE_FIELD)) {
+        return FSTReader::getTypeFromName(mapping[TYPE_FIELD].toString());
+    }
+    
+    // check for blendshapes
+    bool hasBlendshapes = mapping.contains(BLENDSHAPE_FIELD);
+
+    // a Head needs to have these minimum fields...
+    //joint = jointEyeLeft = EyeL = 1
+    //joint = jointEyeRight = EyeR = 1
+    //joint = jointNeck = Head = 1
+    bool hasHeadMinimum = joints.contains("jointNeck") && joints.contains("jointEyeLeft") && joints.contains("jointEyeRight");
+
+    // a Body needs to have these minimum fields...
+    //joint = jointRoot = Hips
+    //joint = jointLean = Spine
+    //joint = jointNeck = Neck
+    //joint = jointHead = HeadTop_End
+
+    bool hasBodyMinimumJoints = joints.contains("jointRoot") && joints.contains("jointLean") && joints.contains("jointNeck")  
+                                        && joints.contains("jointHead");
+    
+    bool isLikelyHead = hasBlendshapes || hasHeadMinimum;
+
+    if (isLikelyHead && hasBodyMinimumJoints) {
+        return HEAD_AND_BODY_MODEL;
+    }
+      
+    if (isLikelyHead) {
+        return HEAD_MODEL;
+    }
+
+    if (hasBodyMinimumJoints) {
+        return BODY_ONLY_MODEL;
+    }
+    
+    return ENTITY_MODEL;
+}
diff --git a/libraries/fbx/src/FSTReader.h b/libraries/fbx/src/FSTReader.h
index 59559dea74..5752a224c6 100644
--- a/libraries/fbx/src/FSTReader.h
+++ b/libraries/fbx/src/FSTReader.h
@@ -12,9 +12,11 @@
 #ifndef hifi_FSTReader_h
 #define hifi_FSTReader_h
 
+#include <QBuffer>
 #include <QVariantHash>
 
 static const QString NAME_FIELD = "name";
+static const QString TYPE_FIELD = "type";
 static const QString FILENAME_FIELD = "filename";
 static const QString TEXDIR_FIELD = "texdir";
 static const QString LOD_FIELD = "lod";
@@ -27,10 +29,35 @@ static const QString JOINT_FIELD = "joint";
 static const QString FREE_JOINT_FIELD = "freeJoint";
 static const QString BLENDSHAPE_FIELD = "bs";
 
-/// Reads an FST mapping from the supplied data.
-QVariantHash readMapping(const QByteArray& data);
+class FSTReader {
+public:
 
-/// Writes an FST mapping to a byte array.
-QByteArray writeMapping(const QVariantHash& mapping);
+    enum ModelType {
+        ENTITY_MODEL,
+        HEAD_MODEL,
+        BODY_ONLY_MODEL,
+        HEAD_AND_BODY_MODEL,
+        ATTACHMENT_MODEL
+    };
+
+    /// Reads an FST mapping from the supplied data.
+    static QVariantHash readMapping(const QByteArray& data);
+
+    /// Writes an FST mapping to a byte array.
+    static QByteArray writeMapping(const QVariantHash& mapping);
+
+    /// Predicts the type of model by examining the mapping 
+    static ModelType predictModelType(const QVariantHash& mapping);
+
+    static QString getNameFromType(ModelType modelType);
+    static FSTReader::ModelType getTypeFromName(const QString& name);
+
+private:
+    static void writeVariant(QBuffer& buffer, QVariantHash::const_iterator& it);
+    static QVariantHash parseMapping(QIODevice* device);
+
+    static QHash<FSTReader::ModelType, QString> _typesToNames;
+    static QHash<QString, FSTReader::ModelType> _namesToTypes;
+};
 
 #endif // hifi_FSTReader_h
\ No newline at end of file
diff --git a/libraries/render-utils/src/GeometryCache.cpp b/libraries/render-utils/src/GeometryCache.cpp
index f8fc4633cc..c74f714e8d 100644
--- a/libraries/render-utils/src/GeometryCache.cpp
+++ b/libraries/render-utils/src/GeometryCache.cpp
@@ -2132,7 +2132,7 @@ void NetworkGeometry::downloadFinished(QNetworkReply* reply) {
     QUrl url = reply->url();
     if (url.path().toLower().endsWith(".fst")) {
         // it's a mapping file; parse it and get the mesh filename
-        _mapping = readMapping(reply->readAll());
+        _mapping = FSTReader::readMapping(reply->readAll());
         reply->deleteLater();
         QString filename = _mapping.value("filename").toString();
         if (filename.isNull()) {
diff --git a/libraries/render-utils/src/TextRenderer.cpp b/libraries/render-utils/src/TextRenderer.cpp
index 9238db91e3..75448f90cc 100644
--- a/libraries/render-utils/src/TextRenderer.cpp
+++ b/libraries/render-utils/src/TextRenderer.cpp
@@ -359,8 +359,12 @@ void Font::setupGL() {
 // FIXME there has to be a cleaner way of doing this
 QStringList Font::tokenizeForWrapping(const QString & str) const {
     QStringList result;
-    foreach(const QString & token1, str.split(" ", QString::SkipEmptyParts)) {
+    foreach(const QString & token1, str.split(" ")) {
         bool lineFeed = false;
+        if (token1.isEmpty()) {
+            result << token1;
+            continue;
+        }
         foreach(const QString & token2, token1.split("\n")) {
             if (lineFeed) {
                 result << "\n";
diff --git a/libraries/script-engine/src/ScriptCache.cpp b/libraries/script-engine/src/ScriptCache.cpp
new file mode 100644
index 0000000000..c0ffc7b4e7
--- /dev/null
+++ b/libraries/script-engine/src/ScriptCache.cpp
@@ -0,0 +1,76 @@
+//
+//  ScriptCache.cpp
+//  libraries/script-engine/src
+//
+//  Created by Brad Hefta-Gaub on 2015-03-30
+//  Copyright 2015 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 <QCoreApplication>
+#include <QEventLoop>
+#include <QNetworkAccessManager>
+#include <QNetworkReply>
+#include <QObject>
+
+#include <NetworkAccessManager.h>
+#include <SharedUtil.h>
+
+#include "ScriptCache.h"
+
+ScriptCache::ScriptCache(QObject* parent) {
+    // nothing to do here...
+}
+
+QString ScriptCache::getScript(const QUrl& url, ScriptUser* scriptUser, bool& isPending) {
+    QString scriptContents;
+    if (_scriptCache.contains(url)) {
+        qDebug() << "Found script in cache:" << url.toString();
+        scriptContents = _scriptCache[url];
+        scriptUser->scriptContentsAvailable(url, scriptContents);
+        isPending = false;
+    } else {
+        isPending = true;
+        bool alreadyWaiting = _scriptUsers.contains(url);
+        _scriptUsers.insert(url, scriptUser);
+        
+        if (alreadyWaiting) {
+            qDebug() << "Already downloading script at:" << url.toString();
+        } else {
+            QNetworkAccessManager& networkAccessManager = NetworkAccessManager::getInstance();
+            QNetworkRequest networkRequest = QNetworkRequest(url);
+            networkRequest.setHeader(QNetworkRequest::UserAgentHeader, HIGH_FIDELITY_USER_AGENT);
+
+            qDebug() << "Downloading script at:" << url.toString();
+            QNetworkReply* reply = networkAccessManager.get(networkRequest);
+            connect(reply, &QNetworkReply::finished, this, &ScriptCache::scriptDownloaded);
+        }
+    }
+    return scriptContents;
+}
+
+void ScriptCache::scriptDownloaded() {
+    QNetworkReply* reply = qobject_cast<QNetworkReply*>(sender());
+    QUrl url = reply->url();
+    QList<ScriptUser*> scriptUsers = _scriptUsers.values(url);
+    _scriptUsers.remove(url);
+    
+    if (reply->error() == QNetworkReply::NoError && reply->attribute(QNetworkRequest::HttpStatusCodeAttribute) == 200) {
+        _scriptCache[url] = reply->readAll();
+        qDebug() << "Done downloading script at:" << url.toString();
+
+        foreach(ScriptUser* user, scriptUsers) {
+            user->scriptContentsAvailable(url, _scriptCache[url]);
+        }
+    } else {
+        qDebug() << "ERROR Loading file:" << reply->url().toString();
+        foreach(ScriptUser* user, scriptUsers) {
+            user->errorInLoadingScript(url);
+        }
+    }
+    reply->deleteLater();
+}
+
+    
diff --git a/libraries/script-engine/src/ScriptCache.h b/libraries/script-engine/src/ScriptCache.h
new file mode 100644
index 0000000000..16bf04c53e
--- /dev/null
+++ b/libraries/script-engine/src/ScriptCache.h
@@ -0,0 +1,44 @@
+//
+//  ScriptCache.h
+//  libraries/script-engine/src
+//
+//  Created by Brad Hefta-Gaub on 2015-03-30
+//  Copyright 2015 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
+//
+
+#ifndef hifi_ScriptCache_h
+#define hifi_ScriptCache_h
+
+#include <ResourceCache.h>
+
+class ScriptUser {
+public:
+    virtual void scriptContentsAvailable(const QUrl& url, const QString& scriptContents) = 0;
+    virtual void errorInLoadingScript(const QUrl& url) = 0;
+};
+
+/// Interface for loading scripts
+class ScriptCache : public QObject, public Dependency {
+    Q_OBJECT
+    SINGLETON_DEPENDENCY
+
+public:
+    QString getScript(const QUrl& url, ScriptUser* scriptUser, bool& isPending);
+    void addScriptToBadScriptList(const QUrl& url) { _badScripts.insert(url); }
+    bool isInBadScriptList(const QUrl& url) { return _badScripts.contains(url); }
+    
+private slots:
+    void scriptDownloaded();
+    
+private:
+    ScriptCache(QObject* parent = NULL);
+    
+    QHash<QUrl, QString> _scriptCache;
+    QMultiMap<QUrl, ScriptUser*> _scriptUsers;
+    QSet<QUrl> _badScripts;
+};
+
+#endif // hifi_ScriptCache_h
\ No newline at end of file
diff --git a/libraries/script-engine/src/ScriptEngine.cpp b/libraries/script-engine/src/ScriptEngine.cpp
index 831db73a0a..c31f5be46a 100644
--- a/libraries/script-engine/src/ScriptEngine.cpp
+++ b/libraries/script-engine/src/ScriptEngine.cpp
@@ -34,6 +34,7 @@
 #include "EventTypes.h"
 #include "MenuItemProperties.h"
 #include "ScriptAudioInjector.h"
+#include "ScriptCache.h"
 #include "ScriptEngine.h"
 #include "TypedArrays.h"
 #include "XMLHttpRequestClass.h"
@@ -275,31 +276,26 @@ void ScriptEngine::loadURL(const QUrl& scriptURL) {
                 _scriptContents = in.readAll();
                 emit scriptLoaded(_fileNameString);
             } else {
-                qDebug() << "ERROR Loading file:" << _fileNameString;
+                qDebug() << "ERROR Loading file:" << _fileNameString << "line:" << __LINE__;
                 emit errorLoadingScript(_fileNameString);
             }
         } else {
-            QNetworkAccessManager& networkAccessManager = NetworkAccessManager::getInstance();
-            QNetworkRequest networkRequest = QNetworkRequest(url);
-            networkRequest.setHeader(QNetworkRequest::UserAgentHeader, HIGH_FIDELITY_USER_AGENT);
-            QNetworkReply* reply = networkAccessManager.get(networkRequest);
-            connect(reply, &QNetworkReply::finished, this, &ScriptEngine::handleScriptDownload);
+            bool isPending;
+            auto scriptCache = DependencyManager::get<ScriptCache>();
+            scriptCache->getScript(url, this, isPending);
+            
         }
     }
 }
 
-void ScriptEngine::handleScriptDownload() {
-    QNetworkReply* reply = qobject_cast<QNetworkReply*>(sender());
-    
-    if (reply->error() == QNetworkReply::NoError && reply->attribute(QNetworkRequest::HttpStatusCodeAttribute) == 200) {
-        _scriptContents = reply->readAll();
-        emit scriptLoaded(_fileNameString);
-    } else {
-        qDebug() << "ERROR Loading file:" << reply->url().toString();
-        emit errorLoadingScript(_fileNameString);
-    }
-    
-    reply->deleteLater();
+void ScriptEngine::scriptContentsAvailable(const QUrl& url, const QString& scriptContents) {
+    _scriptContents = scriptContents;
+    emit scriptLoaded(_fileNameString);
+}
+
+void ScriptEngine::errorInLoadingScript(const QUrl& url) {
+    qDebug() << "ERROR Loading file:" << url.toString() << "line:" << __LINE__;
+    emit errorLoadingScript(_fileNameString); // ??
 }
 
 void ScriptEngine::init() {
@@ -765,7 +761,7 @@ void ScriptEngine::include(const QStringList& includeFiles, QScriptValue callbac
         for (QUrl url : urls) {
             QString contents = data[url];
             if (contents.isNull()) {
-                qDebug() << "Error loading file: " << url;
+                qDebug() << "Error loading file: " << url << "line:" << __LINE__;
             } else {
                 QScriptValue result = evaluate(contents, url.toString());
             }
diff --git a/libraries/script-engine/src/ScriptEngine.h b/libraries/script-engine/src/ScriptEngine.h
index 84d2527bd0..45e56850a7 100644
--- a/libraries/script-engine/src/ScriptEngine.h
+++ b/libraries/script-engine/src/ScriptEngine.h
@@ -28,6 +28,7 @@
 #include "ArrayBufferClass.h"
 #include "AudioScriptingInterface.h"
 #include "Quat.h"
+#include "ScriptCache.h"
 #include "ScriptUUID.h"
 #include "Vec3.h"
 
@@ -35,7 +36,7 @@ const QString NO_SCRIPT("");
 
 const unsigned int SCRIPT_DATA_CALLBACK_USECS = floor(((1.0 / 60.0f) * 1000 * 1000) + 0.5);
 
-class ScriptEngine : public QScriptEngine {
+class ScriptEngine : public QScriptEngine, public ScriptUser {
     Q_OBJECT
 public:
     ScriptEngine(const QString& scriptContents = NO_SCRIPT,
@@ -94,6 +95,9 @@ public:
     
     void waitTillDoneRunning();
 
+    virtual void scriptContentsAvailable(const QUrl& url, const QString& scriptContents);
+    virtual void errorInLoadingScript(const QUrl& url);
+
 public slots:
     void loadURL(const QUrl& scriptURL);
     void stop();
@@ -160,8 +164,6 @@ private:
     ArrayBufferClass* _arrayBufferClass;
 
     QHash<QUuid, quint16> _outgoingScriptAudioSequenceNumbers;
-private slots:
-    void handleScriptDownload();
 
 private:
     static QSet<ScriptEngine*> _allKnownScriptEngines;
diff --git a/libraries/shared/src/Extents.h b/libraries/shared/src/Extents.h
index 95f242c30b..66b33114f7 100644
--- a/libraries/shared/src/Extents.h
+++ b/libraries/shared/src/Extents.h
@@ -14,6 +14,7 @@
 #define hifi_Extents_h
 
 #include <glm/glm.hpp>
+#include <glm/gtx/extented_min_max.hpp>
 
 #include <QDebug>
 #include "StreamUtils.h"
@@ -46,6 +47,9 @@ public:
     /// rotate the extents around orign by rotation
     void rotate(const glm::quat& rotation);
 
+    glm::vec3 size() const { return maximum - minimum; }
+    float largestDimension () const {glm::vec3 s = size(); return glm::max(s[0], s[1], s[2]); }
+
     /// \return new Extents which is original rotated around orign by rotation
     Extents getRotated(const glm::quat& rotation) const {
         Extents temp = { minimum, maximum };
@@ -68,4 +72,4 @@ inline QDebug operator<<(QDebug debug, const Extents& extents) {
 }
 
 
-#endif // hifi_Extents_h
\ No newline at end of file
+#endif // hifi_Extents_h
diff --git a/libraries/shared/src/StreamUtils.cpp b/libraries/shared/src/StreamUtils.cpp
index 96967648ed..f58115d288 100644
--- a/libraries/shared/src/StreamUtils.cpp
+++ b/libraries/shared/src/StreamUtils.cpp
@@ -143,4 +143,12 @@ QDebug& operator<<(QDebug& dbg, const glm::mat4& m) {
     return dbg << " ]}";
 }
 
+QDebug& operator<<(QDebug& dbg, const QVariantHash& v) {
+    dbg.nospace() << "[";
+    for (QVariantHash::const_iterator it = v.constBegin(); it != v.constEnd(); it++) {
+        dbg << it.key() << ":" << it.value();
+    }
+    return dbg << " ]";
+}
+
 #endif // QT_NO_DEBUG_STREAM
diff --git a/libraries/shared/src/StreamUtils.h b/libraries/shared/src/StreamUtils.h
index b9823a6743..fd22f7c068 100644
--- a/libraries/shared/src/StreamUtils.h
+++ b/libraries/shared/src/StreamUtils.h
@@ -15,6 +15,7 @@
 #include <iostream>
 
 #include <QByteArray>
+#include <QVariantHash>
 
 #include <glm/glm.hpp>
 #include <glm/gtx/quaternion.hpp>
@@ -54,6 +55,7 @@ QDebug& operator<<(QDebug& s, const glm::vec3& v);
 QDebug& operator<<(QDebug& s, const glm::vec4& v);
 QDebug& operator<<(QDebug& s, const glm::quat& q);
 QDebug& operator<<(QDebug& s, const glm::mat4& m);
+QDebug& operator<<(QDebug& dbg, const QVariantHash& v);
 #endif // QT_NO_DEBUG_STREAM
 
 #endif // hifi_StreamUtils_h
diff --git a/tools/vhacd/src/VHACDUtil.cpp b/tools/vhacd/src/VHACDUtil.cpp
index bc9ad09bde..4f2cb0e2b8 100644
--- a/tools/vhacd/src/VHACDUtil.cpp
+++ b/tools/vhacd/src/VHACDUtil.cpp
@@ -44,7 +44,13 @@ bool vhacd::VHACDUtil::loadFBX(const QString filename, vhacd::LoadFBXResults *re
     int count = 0;
     foreach(FBXMesh mesh, geometry.meshes) {
         //get vertices for each mesh		
-        QVector<glm::vec3> vertices = mesh.vertices;
+        // QVector<glm::vec3> vertices = mesh.vertices;
+
+
+        QVector<glm::vec3> vertices;
+        foreach (glm::vec3 vertex, mesh.vertices) {
+            vertices.append(glm::vec3(mesh.modelTransform * glm::vec4(vertex, 1.0f)));
+        }
 
         //get the triangle indices for each mesh
         QVector<int> triangles;
@@ -57,8 +63,15 @@ bool vhacd::VHACDUtil::loadFBX(const QString filename, vhacd::LoadFBXResults *re
         if (triangles.count() <= 0){
             continue;
         }           
+
+        AABox aaBox;
+        foreach (glm::vec3 p, vertices) {
+            aaBox += p;
+        }
+
         results->perMeshVertices.append(vertices);
         results->perMeshTriangleIndices.append(triangles);
+        results->perMeshLargestDimension.append(aaBox.getLargestDimension());
         count++;
     }
 
@@ -66,23 +79,117 @@ bool vhacd::VHACDUtil::loadFBX(const QString filename, vhacd::LoadFBXResults *re
     return true;
 }
 
-bool vhacd::VHACDUtil::computeVHACD(vhacd::LoadFBXResults *meshes, VHACD::IVHACD::Parameters params, vhacd::ComputeResults *results)const{
+
+void vhacd::VHACDUtil::combineMeshes(vhacd::LoadFBXResults *meshes, vhacd::LoadFBXResults *results) const {
+    float largestDimension = 0;
+    int indexStart = 0;
+
+    QVector<glm::vec3> emptyVertices;
+    QVector<int> emptyTriangles;
+    results->perMeshVertices.append(emptyVertices);
+    results->perMeshTriangleIndices.append(emptyTriangles);
+    results->perMeshLargestDimension.append(largestDimension);
+
+    for (int i = 0; i < meshes->meshCount; i++) {
+        QVector<glm::vec3> vertices = meshes->perMeshVertices.at(i);
+        QVector<int> triangles = meshes->perMeshTriangleIndices.at(i);
+        const float largestDimension = meshes->perMeshLargestDimension.at(i);
+
+        for (int j = 0; j < triangles.size(); j++) {
+            triangles[ j ] += indexStart;
+        }
+        indexStart += vertices.size();
+
+        results->perMeshVertices[0] << vertices;
+        results->perMeshTriangleIndices[0] << triangles;
+        if (results->perMeshLargestDimension[0] < largestDimension) {
+            results->perMeshLargestDimension[0] = largestDimension;
+        }
+    }
+
+    results->meshCount = 1;
+}
+
+
+void vhacd::VHACDUtil::fattenMeshes(vhacd::LoadFBXResults *meshes, vhacd::LoadFBXResults *results) const {
+
+    for (int i = 0; i < meshes->meshCount; i++) {
+        QVector<glm::vec3> vertices = meshes->perMeshVertices.at(i);
+        QVector<int> triangles = meshes->perMeshTriangleIndices.at(i);
+        const float largestDimension = meshes->perMeshLargestDimension.at(i);
+
+        results->perMeshVertices.append(vertices);
+        results->perMeshTriangleIndices.append(triangles);
+        results->perMeshLargestDimension.append(largestDimension);
+
+        for (int j = 0; j < triangles.size(); j += 3) {
+            auto p0 = vertices[triangles[j]];
+            auto p1 = vertices[triangles[j+1]];
+            auto p2 = vertices[triangles[j+2]];
+
+            auto d0 = p1 - p0;
+            auto d1 = p2 - p0;
+
+            auto cp = glm::cross(d0, d1);
+            cp = 5.0f * glm::normalize(cp);
+
+            auto p3 = p0 + cp;
+            auto p4 = p1 + cp;
+            auto p5 = p2 + cp;
+            
+            auto n = results->perMeshVertices.size();
+            results->perMeshVertices[i] << p3 << p4 << p5;
+            results->perMeshTriangleIndices[i] << n << n+1 << n+2;
+        }
+
+        results->meshCount++;
+    }
+}
+
+
+
+bool vhacd::VHACDUtil::computeVHACD(vhacd::LoadFBXResults *meshes, VHACD::IVHACD::Parameters params,
+                                    vhacd::ComputeResults *results,
+                                    int startMeshIndex, int endMeshIndex, float minimumMeshSize) const {
+
+    // vhacd::LoadFBXResults *meshes = new vhacd::LoadFBXResults;
+    // combineMeshes(inMeshes, meshes);
+
+    // vhacd::LoadFBXResults *meshes = new vhacd::LoadFBXResults;
+    // fattenMeshes(inMeshes, meshes);
+
+
     VHACD::IVHACD * interfaceVHACD = VHACD::CreateVHACD();
     int meshCount = meshes->meshCount;
     int count = 0;
     std::cout << "Performing V-HACD computation on " << meshCount << " meshes ..... " << std::endl;
 
-    for (int i = 0; i < meshCount; i++){
+    if (startMeshIndex < 0) {
+        startMeshIndex = 0;
+    }
+    if (endMeshIndex < 0) {
+        endMeshIndex = meshCount;
+    }
 
+    for (int i = startMeshIndex; i < endMeshIndex; i++){
+        qDebug() << "--------------------";
         std::vector<glm::vec3> vertices = meshes->perMeshVertices.at(i).toStdVector();
         std::vector<int> triangles = meshes->perMeshTriangleIndices.at(i).toStdVector();
         int nPoints = (unsigned int)vertices.size();
         int nTriangles = (unsigned int)triangles.size() / 3;
-        std::cout << "Mesh " << i + 1 << " :    ";
+        const float largestDimension = meshes->perMeshLargestDimension.at(i);
+
+        qDebug() << "Mesh " << i << " -- " << nPoints << " points, " << nTriangles << " triangles, "
+                 << "size =" << largestDimension;
+
+        if (largestDimension < minimumMeshSize /* || largestDimension > 1000 */) {
+            qDebug() << " Skipping...";
+            continue;
+        }
         // compute approximate convex decomposition
         bool res = interfaceVHACD->Compute(&vertices[0].x, 3, nPoints, &triangles[0], 3, nTriangles, params);
         if (!res){
-            std::cout << "V-HACD computation failed for Mesh : " << i + 1 << std::endl;
+            qDebug() << "V-HACD computation failed for Mesh : " << i;
             continue;
         }
         count++; //For counting number of successfull computations
@@ -111,8 +218,6 @@ bool vhacd::VHACDUtil::computeVHACD(vhacd::LoadFBXResults *meshes, VHACD::IVHACD
                 m_triangles_copy[ i ] = hull.m_triangles[ i ];
             }
             hull.m_triangles = m_triangles_copy;
-
-
             convexHulls.append(hull);
         }
         results->convexHullList.append(convexHulls);
diff --git a/tools/vhacd/src/VHACDUtil.h b/tools/vhacd/src/VHACDUtil.h
index b0b9da9720..fd5d253334 100644
--- a/tools/vhacd/src/VHACDUtil.h
+++ b/tools/vhacd/src/VHACDUtil.h
@@ -34,12 +34,16 @@ namespace vhacd {
         int meshCount;
         QVector<QVector<glm::vec3>> perMeshVertices;
         QVector<QVector<int>> perMeshTriangleIndices;
+        QVector<float> perMeshLargestDimension;
     } LoadFBXResults;
 
     class VHACDUtil {
     public:
         bool loadFBX(const QString filename, vhacd::LoadFBXResults *results);
-        bool computeVHACD(vhacd::LoadFBXResults *meshes, VHACD::IVHACD::Parameters params, vhacd::ComputeResults *results)const;
+        void combineMeshes(vhacd::LoadFBXResults *meshes, vhacd::LoadFBXResults *results) const;
+        void fattenMeshes(vhacd::LoadFBXResults *meshes, vhacd::LoadFBXResults *results) const;
+        bool computeVHACD(vhacd::LoadFBXResults *meshes, VHACD::IVHACD::Parameters params,
+                          vhacd::ComputeResults *results, int startMeshIndex, int endMeshIndex, float minimumMeshSize) const;
         ~VHACDUtil();
     };
 
diff --git a/tools/vhacd/src/VHACDUtilApp.cpp b/tools/vhacd/src/VHACDUtilApp.cpp
index b4c141acae..a1a04fd127 100644
--- a/tools/vhacd/src/VHACDUtilApp.cpp
+++ b/tools/vhacd/src/VHACDUtilApp.cpp
@@ -98,6 +98,15 @@ VHACDUtilApp::VHACDUtilApp(int argc, char* argv[]) :
     const QCommandLineOption outputFilenameOption("o", "output file", "filename.obj");
     parser.addOption(outputFilenameOption);
 
+    const QCommandLineOption startMeshIndexOption("s", "start-mesh index", "0");
+    parser.addOption(startMeshIndexOption);
+
+    const QCommandLineOption endMeshIndexOption("e", "end-mesh index", "0");
+    parser.addOption(endMeshIndexOption);
+
+    const QCommandLineOption minimumMeshSizeOption("m", "minimum mesh size to consider", "0");
+    parser.addOption(minimumMeshSizeOption);
+
 
     if (!parser.parse(QCoreApplication::arguments())) {
         qCritical() << parser.errorText() << endl;
@@ -138,13 +147,31 @@ VHACDUtilApp::VHACDUtilApp(int argc, char* argv[]) :
         Q_UNREACHABLE();
     }
 
+    int startMeshIndex = -1;
+    // check for an assignment pool passed on the command line or in the config
+    if (parser.isSet(startMeshIndexOption)) {
+        startMeshIndex = parser.value(startMeshIndexOption).toInt();
+    }
+
+    int endMeshIndex = -1;
+    // check for an assignment pool passed on the command line or in the config
+    if (parser.isSet(endMeshIndexOption)) {
+        endMeshIndex = parser.value(endMeshIndexOption).toInt();
+    }
+
+    float minimumMeshSize = 0.0f;
+    // check for an assignment pool passed on the command line or in the config
+    if (parser.isSet(minimumMeshSizeOption)) {
+        minimumMeshSize = parser.value(minimumMeshSizeOption).toFloat();
+    }
+
 
     //set parameters for V-HACD
     params.m_callback = &pCallBack; //progress callback
     params.m_resolution = 100000; // 100000
     params.m_depth = 20; // 20
     params.m_concavity = 0.001; // 0.001
-    params.m_delta = 0.01; // 0.05
+    params.m_delta = 0.05; // 0.05
     params.m_planeDownsampling = 4; // 4
     params.m_convexhullDownsampling = 4; // 4
     params.m_alpha = 0.05; // 0.05  // controls the bias toward clipping along symmetry planes
@@ -153,7 +180,7 @@ VHACDUtilApp::VHACDUtilApp(int argc, char* argv[]) :
     params.m_pca = 0; // 0  enable/disable normalizing the mesh before applying the convex decomposition
     params.m_mode = 0; // 0: voxel-based (recommended), 1: tetrahedron-based
     params.m_maxNumVerticesPerCH = 64; // 64
-    params.m_minVolumePerCH = 0.00001; // 0.0001
+    params.m_minVolumePerCH = 0.0001; // 0.0001
     params.m_callback = 0; // 0
     params.m_logger = 0; // 0
     params.m_convexhullApproximation = true; // true
@@ -172,7 +199,7 @@ VHACDUtilApp::VHACDUtilApp(int argc, char* argv[]) :
     begin = std::chrono::high_resolution_clock::now();
 
 
-    if (!vUtil.computeVHACD(&fbx, params, &results)){
+    if (!vUtil.computeVHACD(&fbx, params, &results, startMeshIndex, endMeshIndex, minimumMeshSize)) {
         cout << "Compute Failed...";
     }
     end = std::chrono::high_resolution_clock::now();