diff --git a/libraries/networking/src/ResourceCache.cpp b/libraries/networking/src/ResourceCache.cpp
index d1dabd5693..eb69f75279 100644
--- a/libraries/networking/src/ResourceCache.cpp
+++ b/libraries/networking/src/ResourceCache.cpp
@@ -128,6 +128,13 @@ void ScriptableResource::release() {
     _resource.reset();
 }
 
+void ScriptableResource::updateMemoryCost(const QObject* engine) {
+    if (_resource && !_resource->isInScript()) {
+        _resource->setInScript(true);
+        connect(_resource.data(), SIGNAL(updateSize(qint64)), engine, SLOT(updateMemoryCost(qint64)));
+    }
+}
+
 void ScriptableResource::finished(bool success) {
     disconnectHelper();
 
@@ -329,6 +336,7 @@ QSharedPointer<Resource> ResourceCache::getResource(const QUrl& url, const QUrl&
                               getResource(fallback, QUrl(), true) : QSharedPointer<Resource>(), delayLoad, extra);
     resource->setSelf(resource);
     resource->setCache(this);
+    connect(resource.data(), &Resource::updateSize, this, &ResourceCache::updateTotalSize);
     {
         QWriteLocker locker(&_resourcesLock);
         _resources.insert(url, resource);
@@ -414,8 +422,8 @@ void ResourceCache::removeResource(const QUrl& url, qint64 size) {
     _totalResourcesSize -= size;
 }
 
-void ResourceCache::updateTotalSize(const qint64& oldSize, const qint64& newSize) {
-    _totalResourcesSize += (newSize - oldSize);
+void ResourceCache::updateTotalSize(const qint64& deltaSize) {
+    _totalResourcesSize += deltaSize;
     emit dirty();
 }
  
@@ -592,7 +600,7 @@ void Resource::finishedLoading(bool success) {
 }
 
 void Resource::setSize(const qint64& bytes) {
-    QMetaObject::invokeMethod(_cache.data(), "updateTotalSize", Q_ARG(qint64, _bytes), Q_ARG(qint64, bytes));
+    emit updateSize(bytes - _bytes);
     _bytes = bytes;
 }
 
diff --git a/libraries/networking/src/ResourceCache.h b/libraries/networking/src/ResourceCache.h
index 997c9be37d..5b76cb48cd 100644
--- a/libraries/networking/src/ResourceCache.h
+++ b/libraries/networking/src/ResourceCache.h
@@ -95,6 +95,9 @@ public:
     bool isLoaded() const { return _isLoaded; }
     bool isFailed() const { return _isFailed; }
 
+    // Connects to a SLOT(updateMemoryCost(qint64) on the given engine
+    void updateMemoryCost(const QObject* engine);
+
 signals:
     void progressChanged(uint64_t bytesReceived, uint64_t bytesTotal);
     void loadedChanged(bool loaded); // analogous to &Resource::finished
@@ -166,7 +169,7 @@ public slots:
     void checkAsynchronousGets();
 
 protected slots:
-    void updateTotalSize(const qint64& oldSize, const qint64& newSize);
+    void updateTotalSize(const qint64& deltaSize);
 
 private slots:
     void clearATPAssets();
@@ -291,6 +294,9 @@ signals:
     /// Fired when the resource is refreshed.
     void onRefresh();
 
+    /// Fired when the size changes (through setSize).
+    void updateSize(qint64 deltaSize);
+
 protected slots:
     void attemptRequest();
 
@@ -332,17 +338,21 @@ private:
     void makeRequest();
     void retry();
     void reinsert();
+
+    bool isInScript() const { return _isInScript; }
+    void setInScript(bool isInScript) { _isInScript = isInScript; }
     
     friend class ResourceCache;
     friend class ScriptableResource;
     
-    ResourceRequest* _request = nullptr;
-    int _lruKey = 0;
-    QTimer* _replyTimer = nullptr;
-    qint64 _bytesReceived = 0;
-    qint64 _bytesTotal = 0;
-    qint64 _bytes = 0;
-    int _attempts = 0;
+    ResourceRequest* _request{ nullptr };
+    int _lruKey{ 0 };
+    QTimer* _replyTimer{ nullptr };
+    qint64 _bytesReceived{ 0 };
+    qint64 _bytesTotal{ 0 };
+    qint64 _bytes{ 0 };
+    int _attempts{ 0 };
+    bool _isInScript{ false };
 };
 
 uint qHash(const QPointer<QObject>& value, uint seed = 0);
diff --git a/libraries/script-engine/src/ScriptEngine.cpp b/libraries/script-engine/src/ScriptEngine.cpp
index 4c6a988f36..29d592eec2 100644
--- a/libraries/script-engine/src/ScriptEngine.cpp
+++ b/libraries/script-engine/src/ScriptEngine.cpp
@@ -274,6 +274,7 @@ static void resultHandlerFromScriptValue(const QScriptValue& value, AnimVariantR
 using ScriptableResourceRawPtr = ScriptableResource*;
 
 static QScriptValue scriptableResourceToScriptValue(QScriptEngine* engine, const ScriptableResourceRawPtr& resource) {
+    resource->updateMemoryCost(engine);
     auto object = engine->newQObject(
         const_cast<ScriptableResourceRawPtr>(resource),
         QScriptEngine::ScriptOwnership);
@@ -809,6 +810,12 @@ void ScriptEngine::callAnimationStateHandler(QScriptValue callback, AnimVariantM
     }
 }
 
+void ScriptEngine::updateMemoryCost(const qint64& deltaSize) {
+    if (deltaSize > 0) {
+        reportAdditionalMemoryCost(deltaSize);
+    }
+}
+
 void ScriptEngine::timerFired() {
     QTimer* callingTimer = reinterpret_cast<QTimer*>(sender());
     CallbackData timerData = _timerFunctionMap.value(callingTimer);
diff --git a/libraries/script-engine/src/ScriptEngine.h b/libraries/script-engine/src/ScriptEngine.h
index 605f30ed6e..175a3f1f1c 100644
--- a/libraries/script-engine/src/ScriptEngine.h
+++ b/libraries/script-engine/src/ScriptEngine.h
@@ -158,6 +158,7 @@ public:
 
 public slots:
     void callAnimationStateHandler(QScriptValue callback, AnimVariantMap parameters, QStringList names, bool useNames, AnimVariantResultHandler resultHandler);
+    void updateMemoryCost(const qint64&);
 
 signals:
     void scriptLoaded(const QString& scriptFilename);