diff --git a/libraries/model-networking/src/model-networking/ModelCache.cpp b/libraries/model-networking/src/model-networking/ModelCache.cpp
index 7e1de5055d..399084b42a 100644
--- a/libraries/model-networking/src/model-networking/ModelCache.cpp
+++ b/libraries/model-networking/src/model-networking/ModelCache.cpp
@@ -32,6 +32,7 @@ class GeometryExtra {
 public:
     const QVariantHash& mapping;
     const QUrl& textureBaseUrl;
+    bool combineParts;
 };
 
 QUrl resolveTextureBaseUrl(const QUrl& url, const QUrl& textureBaseUrl) {
@@ -89,7 +90,7 @@ void GeometryMappingResource::downloadFinished(const QByteArray& data) {
         }
 
         auto modelCache = DependencyManager::get<ModelCache>();
-        GeometryExtra extra{ mapping, _textureBaseUrl };
+        GeometryExtra extra{ mapping, _textureBaseUrl, false }; // XXX
 
         // Get the raw GeometryResource
         _geometryResource = modelCache->getResource(url, QUrl(), &extra).staticCast<GeometryResource>();
@@ -129,8 +130,8 @@ void GeometryMappingResource::onGeometryMappingLoaded(bool success) {
 class GeometryReader : public QRunnable {
 public:
     GeometryReader(QWeakPointer<Resource>& resource, const QUrl& url, const QVariantHash& mapping,
-        const QByteArray& data) :
-        _resource(resource), _url(url), _mapping(mapping), _data(data) {
+                   const QByteArray& data, bool combineParts) :
+        _resource(resource), _url(url), _mapping(mapping), _data(data), _combineParts(combineParts) {
 
         DependencyManager::get<StatTracker>()->incrementStat("PendingProcessing");
     }
@@ -142,6 +143,7 @@ private:
     QUrl _url;
     QVariantHash _mapping;
     QByteArray _data;
+    bool _combineParts;
 };
 
 void GeometryReader::run() {
@@ -210,8 +212,8 @@ void GeometryReader::run() {
 class GeometryDefinitionResource : public GeometryResource {
     Q_OBJECT
 public:
-    GeometryDefinitionResource(const QUrl& url, const QVariantHash& mapping, const QUrl& textureBaseUrl) :
-        GeometryResource(url, resolveTextureBaseUrl(url, textureBaseUrl)), _mapping(mapping) {}
+    GeometryDefinitionResource(const QUrl& url, const QVariantHash& mapping, const QUrl& textureBaseUrl, bool combineParts) :
+        GeometryResource(url, resolveTextureBaseUrl(url, textureBaseUrl)), _mapping(mapping), _combineParts(combineParts) {}
 
     QString getType() const override { return "GeometryDefinition"; }
 
@@ -222,10 +224,11 @@ protected:
 
 private:
     QVariantHash _mapping;
+    bool _combineParts;
 };
 
 void GeometryDefinitionResource::downloadFinished(const QByteArray& data) {
-    QThreadPool::globalInstance()->start(new GeometryReader(_self, _url, _mapping, data));
+    QThreadPool::globalInstance()->start(new GeometryReader(_self, _url, _mapping, data, _combineParts));
 }
 
 void GeometryDefinitionResource::setGeometryDefinition(FBXGeometry::Pointer fbxGeometry) {
@@ -266,7 +269,7 @@ ModelCache::ModelCache() {
 }
 
 QSharedPointer<Resource> ModelCache::createResource(const QUrl& url, const QSharedPointer<Resource>& fallback,
-    const void* extra) {
+                                                    const void* extra) {
     Resource* resource = nullptr;
     if (url.path().toLower().endsWith(".fst")) {
         resource = new GeometryMappingResource(url);
@@ -274,14 +277,15 @@ QSharedPointer<Resource> ModelCache::createResource(const QUrl& url, const QShar
         const GeometryExtra* geometryExtra = static_cast<const GeometryExtra*>(extra);
         auto mapping = geometryExtra ? geometryExtra->mapping : QVariantHash();
         auto textureBaseUrl = geometryExtra ? geometryExtra->textureBaseUrl : QUrl();
-        resource = new GeometryDefinitionResource(url, mapping, textureBaseUrl);
+        bool combineParts = geometryExtra ? geometryExtra->combineParts : false;
+        resource = new GeometryDefinitionResource(url, mapping, textureBaseUrl, combineParts);
     }
 
     return QSharedPointer<Resource>(resource, &Resource::deleter);
 }
 
 GeometryResource::Pointer ModelCache::getGeometryResource(const QUrl& url, const QVariantHash& mapping, const QUrl& textureBaseUrl) {
-    GeometryExtra geometryExtra = { mapping, textureBaseUrl };
+    GeometryExtra geometryExtra = { mapping, textureBaseUrl, false }; // XXX
     GeometryResource::Pointer resource = getResource(url, QUrl(), &geometryExtra).staticCast<GeometryResource>();
     if (resource) {
         if (resource->isLoaded() && resource->shouldSetTextures()) {
diff --git a/libraries/model-networking/src/model-networking/ModelCache.h b/libraries/model-networking/src/model-networking/ModelCache.h
index 2cd96a84c7..3952924b27 100644
--- a/libraries/model-networking/src/model-networking/ModelCache.h
+++ b/libraries/model-networking/src/model-networking/ModelCache.h
@@ -142,7 +142,7 @@ protected:
     friend class GeometryMappingResource;
 
     virtual QSharedPointer<Resource> createResource(const QUrl& url, const QSharedPointer<Resource>& fallback,
-        const void* extra) override;
+                                                    const void* extra) override;
 
 private:
     ModelCache();
diff --git a/libraries/networking/src/ResourceCache.h b/libraries/networking/src/ResourceCache.h
index 8f1f1baed2..53ccd2c386 100644
--- a/libraries/networking/src/ResourceCache.h
+++ b/libraries/networking/src/ResourceCache.h
@@ -295,8 +295,8 @@ protected:
 
     /// Creates a new resource.
     virtual QSharedPointer<Resource> createResource(const QUrl& url, const QSharedPointer<Resource>& fallback,
-        const void* extra) = 0;
-    
+                                                    const void* extra) = 0;
+
     void addUnusedResource(const QSharedPointer<Resource>& resource);
     void removeUnusedResource(const QSharedPointer<Resource>& resource);
 
diff --git a/tools/vhacd-util/src/VHACDUtilApp.cpp b/tools/vhacd-util/src/VHACDUtilApp.cpp
index cae184a49c..4d48bdf2bf 100644
--- a/tools/vhacd-util/src/VHACDUtilApp.cpp
+++ b/tools/vhacd-util/src/VHACDUtilApp.cpp
@@ -10,6 +10,7 @@
 //
 
 #include <QCommandLineParser>
+#include <Trace.h>
 #include <VHACD.h>
 #include "VHACDUtilApp.h"
 #include "VHACDUtil.h"
@@ -98,6 +99,8 @@ VHACDUtilApp::VHACDUtilApp(int argc, char* argv[]) :
 {
     vhacd::VHACDUtil vUtil;
 
+    DependencyManager::set<tracing::Tracer>();
+
     // parse command-line
     QCommandLineParser parser;
     parser.setApplicationDescription("High Fidelity Object Decomposer");