diff --git a/.gitignore b/.gitignore
index 26aaad743..f2d2d267a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -66,3 +66,6 @@ oculussig_*
 third_party
 
 user.properties*
+
+# Node modules
+node_modules
diff --git a/README.md b/README.md
index 8a72948e0..cd586684f 100644
--- a/README.md
+++ b/README.md
@@ -100,6 +100,15 @@ geckoViewLocalArm=/path/to/your/build/geckoview-nightly-armeabi-v7a-64.0.2018092
 geckoViewLocalX86=/path/to/your/build/geckoview-nightly-x86-64.0.20180924100359.aar
 ```
 
+## Compress assets
+
+ETC2 compression is used to improve performance and memory usage. Raw assets are placed in the `uncompressed_assets` folder. You can generate the compressed textures using the compressor utility in `tools/compressor`. You need to set up [etc2comp](https://github.com/google/etc2comp) and make it available on your PATH before running the script. Run this command to generate the compressed assets:
+
+```bash
+npm install
+gulp compress
+```
+
 ## Development troubleshooting
 
 ### `Device supports , but APK only supports armeabi-v7a[...]`
diff --git a/app/src/googlevr/assets/vr_controller_daydream.mtl b/app/src/googlevr/assets/vr_controller_daydream.mtl
index edb371587..57972293b 100644
--- a/app/src/googlevr/assets/vr_controller_daydream.mtl
+++ b/app/src/googlevr/assets/vr_controller_daydream.mtl
@@ -10,5 +10,5 @@ Ke 0.000000 0.000000 0.000000
 Ni 1.500000
 d 1.000000
 illum 2
-map_Kd vr_controller_daydream_tex.png
-map_Ka vr_controller_daydream_tex.png
+map_Kd vr_controller_daydream_tex.ktx
+map_Ka vr_controller_daydream_tex.ktx
diff --git a/app/src/googlevr/assets/vr_controller_daydream_tex.ktx b/app/src/googlevr/assets/vr_controller_daydream_tex.ktx
new file mode 100644
index 000000000..04baf4bcd
Binary files /dev/null and b/app/src/googlevr/assets/vr_controller_daydream_tex.ktx differ
diff --git a/app/src/main/assets/cubemap/cave/negx.ktx b/app/src/main/assets/cubemap/cave/negx.ktx
new file mode 100644
index 000000000..82ab5faf5
Binary files /dev/null and b/app/src/main/assets/cubemap/cave/negx.ktx differ
diff --git a/app/src/main/assets/cubemap/cave/negy.ktx b/app/src/main/assets/cubemap/cave/negy.ktx
new file mode 100644
index 000000000..1a9242504
Binary files /dev/null and b/app/src/main/assets/cubemap/cave/negy.ktx differ
diff --git a/app/src/main/assets/cubemap/cave/negz.ktx b/app/src/main/assets/cubemap/cave/negz.ktx
new file mode 100644
index 000000000..24f67f99d
Binary files /dev/null and b/app/src/main/assets/cubemap/cave/negz.ktx differ
diff --git a/app/src/main/assets/cubemap/cave/posx.ktx b/app/src/main/assets/cubemap/cave/posx.ktx
new file mode 100644
index 000000000..ad2c48c5b
Binary files /dev/null and b/app/src/main/assets/cubemap/cave/posx.ktx differ
diff --git a/app/src/main/assets/cubemap/cave/posy.ktx b/app/src/main/assets/cubemap/cave/posy.ktx
new file mode 100644
index 000000000..de39d9730
Binary files /dev/null and b/app/src/main/assets/cubemap/cave/posy.ktx differ
diff --git a/app/src/main/assets/cubemap/cave/posz.ktx b/app/src/main/assets/cubemap/cave/posz.ktx
new file mode 100644
index 000000000..e43fd19a8
Binary files /dev/null and b/app/src/main/assets/cubemap/cave/posz.ktx differ
diff --git a/app/src/main/assets/cubemap/meadow/negx.ktx b/app/src/main/assets/cubemap/meadow/negx.ktx
new file mode 100644
index 000000000..6e7d59806
Binary files /dev/null and b/app/src/main/assets/cubemap/meadow/negx.ktx differ
diff --git a/app/src/main/assets/cubemap/meadow/negy.ktx b/app/src/main/assets/cubemap/meadow/negy.ktx
new file mode 100644
index 000000000..c85daed11
Binary files /dev/null and b/app/src/main/assets/cubemap/meadow/negy.ktx differ
diff --git a/app/src/main/assets/cubemap/meadow/negz.ktx b/app/src/main/assets/cubemap/meadow/negz.ktx
new file mode 100644
index 000000000..d210a3530
Binary files /dev/null and b/app/src/main/assets/cubemap/meadow/negz.ktx differ
diff --git a/app/src/main/assets/cubemap/meadow/posx.ktx b/app/src/main/assets/cubemap/meadow/posx.ktx
new file mode 100644
index 000000000..262023938
Binary files /dev/null and b/app/src/main/assets/cubemap/meadow/posx.ktx differ
diff --git a/app/src/main/assets/cubemap/meadow/posy.ktx b/app/src/main/assets/cubemap/meadow/posy.ktx
new file mode 100644
index 000000000..04486177a
Binary files /dev/null and b/app/src/main/assets/cubemap/meadow/posy.ktx differ
diff --git a/app/src/main/assets/cubemap/meadow/posz.ktx b/app/src/main/assets/cubemap/meadow/posz.ktx
new file mode 100644
index 000000000..c5884b57d
Binary files /dev/null and b/app/src/main/assets/cubemap/meadow/posz.ktx differ
diff --git a/app/src/main/assets/cubemap/space/negx.ktx b/app/src/main/assets/cubemap/space/negx.ktx
new file mode 100644
index 000000000..b771d5e40
Binary files /dev/null and b/app/src/main/assets/cubemap/space/negx.ktx differ
diff --git a/app/src/main/assets/cubemap/space/negy.ktx b/app/src/main/assets/cubemap/space/negy.ktx
new file mode 100644
index 000000000..e1d5a2b81
Binary files /dev/null and b/app/src/main/assets/cubemap/space/negy.ktx differ
diff --git a/app/src/main/assets/cubemap/space/negz.ktx b/app/src/main/assets/cubemap/space/negz.ktx
new file mode 100644
index 000000000..af8833e30
Binary files /dev/null and b/app/src/main/assets/cubemap/space/negz.ktx differ
diff --git a/app/src/main/assets/cubemap/space/posx.ktx b/app/src/main/assets/cubemap/space/posx.ktx
new file mode 100644
index 000000000..99b028839
Binary files /dev/null and b/app/src/main/assets/cubemap/space/posx.ktx differ
diff --git a/app/src/main/assets/cubemap/space/posy.ktx b/app/src/main/assets/cubemap/space/posy.ktx
new file mode 100644
index 000000000..9896e2175
Binary files /dev/null and b/app/src/main/assets/cubemap/space/posy.ktx differ
diff --git a/app/src/main/assets/cubemap/space/posz.ktx b/app/src/main/assets/cubemap/space/posz.ktx
new file mode 100644
index 000000000..394e594b1
Binary files /dev/null and b/app/src/main/assets/cubemap/space/posz.ktx differ
diff --git a/app/src/main/assets/spinners_v3.ktx b/app/src/main/assets/spinners_v3.ktx
new file mode 100644
index 000000000..eabee51e8
Binary files /dev/null and b/app/src/main/assets/spinners_v3.ktx differ
diff --git a/app/src/main/assets/spinners_v3.mtl b/app/src/main/assets/spinners_v3.mtl
index ffbc55986..3686212ab 100755
--- a/app/src/main/assets/spinners_v3.mtl
+++ b/app/src/main/assets/spinners_v3.mtl
@@ -10,4 +10,4 @@ Ke 0.000000 0.000000 0.000000
 Ni 1.000000
 d 1.000000
 illum 2
-map_Kd spinners_v3.jpg
+map_Kd spinners_v3.ktx
diff --git a/app/src/main/assets/webvr_spinner.png b/app/src/main/assets/webvr_spinner.png
deleted file mode 100644
index 057000234..000000000
Binary files a/app/src/main/assets/webvr_spinner.png and /dev/null differ
diff --git a/app/src/main/cpp/BrowserWorld.cpp b/app/src/main/cpp/BrowserWorld.cpp
index 2d0ba41a1..88854808e 100644
--- a/app/src/main/cpp/BrowserWorld.cpp
+++ b/app/src/main/cpp/BrowserWorld.cpp
@@ -505,14 +505,16 @@ BrowserWorld::InitializeJava(JNIEnv* aEnv, jobject& aActivity, jobject& aAssetMa
     m.loadingAnimation->LoadModels(m.loader);
     m.rootController->AddNode(m.controllers->GetRoot());
     std::string skyboxPath = VRBrowser::GetActiveEnvironment();
+    std::string extension;
     if (VRBrowser::isOverrideEnvPathEnabled()) {
       std::string storagePath = VRBrowser::GetStorageAbsolutePath(INJECT_SKYBOX_PATH);
       if (std::ifstream(storagePath)) {
         skyboxPath = storagePath;
+        extension = ".jpg";
       }
     }
 #if !defined(SNAPDRAGONVR)
-    CreateSkyBox(skyboxPath.c_str());
+    CreateSkyBox(skyboxPath.c_str(), extension);
     // Don't load the env model, we are going for skyboxes in v1.0
 //    CreateFloor();
 #endif
@@ -650,7 +652,7 @@ BrowserWorld::UpdateEnvironment() {
   ASSERT_ON_RENDER_THREAD();
   std::string env = VRBrowser::GetActiveEnvironment();
   VRB_LOG("Setting environment: %s", env.c_str());
-  CreateSkyBox(env.c_str());
+  CreateSkyBox(env.c_str(), "");
 }
 
 void
@@ -1071,21 +1073,23 @@ BrowserWorld::DrawSplashAnimation() {
 }
 
 void
-BrowserWorld::CreateSkyBox(const std::string& basePath) {
+BrowserWorld::CreateSkyBox(const std::string& aBasePath, const std::string& aExtension) {
   ASSERT_ON_RENDER_THREAD();
-  const bool empty = basePath == "cubemap/void";
+  const bool empty = aBasePath == "cubemap/void";
+  const std::string extension = aExtension.empty() ? ".ktx" : aExtension;
   if (m.skybox && empty) {
     m.skybox->SetVisible(false);
     return;
   } else if (m.skybox) {
     m.skybox->SetVisible(true);
-    m.skybox->Load(m.loader, basePath);
+    m.skybox->Load(m.loader, aBasePath, extension);
     return;
   } else if (!empty) {
-    VRLayerCubePtr layer = m.device->CreateLayerCube(1024, 1024);
+    GLenum glFormat = extension == ".ktx" ? GL_COMPRESSED_RGB8_ETC2 : GL_RGB8;
+    VRLayerCubePtr layer = m.device->CreateLayerCube(1024, 1024, glFormat);
     m.skybox = Skybox::Create(m.create, layer);
     m.rootOpaqueParent->AddNode(m.skybox->GetRoot());
-    m.skybox->Load(m.loader, basePath);
+    m.skybox->Load(m.loader, aBasePath, extension);
   }
 }
 
diff --git a/app/src/main/cpp/BrowserWorld.h b/app/src/main/cpp/BrowserWorld.h
index 949cce73e..b86d09984 100644
--- a/app/src/main/cpp/BrowserWorld.h
+++ b/app/src/main/cpp/BrowserWorld.h
@@ -65,7 +65,7 @@ class BrowserWorld {
   void DrawImmersive();
   void DrawLoadingAnimation();
   void DrawSplashAnimation();
-  void CreateSkyBox(const std::string& basePath);
+  void CreateSkyBox(const std::string& aBasePath, const std::string& aExtension);
   void CreateFloor();
   float DistanceToPlane(const vrb::NodePtr& aNode, const vrb::Vector& aPosition, const vrb::Vector& aDirection) const;
 private:
diff --git a/app/src/main/cpp/DeviceDelegate.h b/app/src/main/cpp/DeviceDelegate.h
index 634b8c97b..0fa318f99 100644
--- a/app/src/main/cpp/DeviceDelegate.h
+++ b/app/src/main/cpp/DeviceDelegate.h
@@ -65,7 +65,7 @@ class DeviceDelegate {
   virtual VRLayerQuadPtr CreateLayerQuad(int32_t aWidth,
                                          int32_t aHeight,
                                          VRLayerQuad::SurfaceType aSurfaceType) { return nullptr; }
-  virtual VRLayerCubePtr CreateLayerCube(int32_t aWidth, int32_t aHeight) { return nullptr; }
+  virtual VRLayerCubePtr CreateLayerCube(int32_t aWidth, int32_t aHeight, GLint aInternalFormat) { return nullptr; }
   virtual VRLayerEquirectPtr CreateLayerEquirect(const VRLayerQuadPtr &aSource) { return nullptr; }
   virtual void DeleteLayer(const VRLayerPtr& aLayer) {};
 protected:
diff --git a/app/src/main/cpp/Skybox.cpp b/app/src/main/cpp/Skybox.cpp
index 4b1bc080b..419f237d7 100644
--- a/app/src/main/cpp/Skybox.cpp
+++ b/app/src/main/cpp/Skybox.cpp
@@ -25,7 +25,8 @@ using namespace vrb;
 
 namespace crow {
 
-static TextureCubeMapPtr LoadTextureCube(vrb::CreationContextPtr& aContext, const std::string& aBasePath, GLuint targetTexture = 0) {
+static TextureCubeMapPtr LoadTextureCube(vrb::CreationContextPtr& aContext, const std::string& aBasePath,
+                                         const std::string& aExtension, GLuint targetTexture = 0) {
   TextureCubeMapPtr cubemap = vrb::TextureCubeMap::Create(aContext, targetTexture);
   cubemap->SetTextureParameter(GL_TEXTURE_MAG_FILTER, GL_LINEAR);
   cubemap->SetTextureParameter(GL_TEXTURE_MIN_FILTER, GL_LINEAR);
@@ -33,7 +34,7 @@ static TextureCubeMapPtr LoadTextureCube(vrb::CreationContextPtr& aContext, cons
   cubemap->SetTextureParameter(GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
   cubemap->SetTextureParameter(GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
 
-  auto path = [&](const std::string &name) { return aBasePath + "/" + name + ".jpg"; };
+  auto path = [&](const std::string &name) { return aBasePath + "/" + name + aExtension; };
   vrb::TextureCubeMap::Load(aContext, cubemap, path("posx"), path("negx"), path("posy"),
                             path("negy"), path("posz"), path("negz"));
   return cubemap;
@@ -48,6 +49,7 @@ struct Skybox::State {
   vrb::GeometryPtr geometry;
   vrb::ModelLoaderAndroidPtr loader;
   std::string basePath;
+  std::string extension;
   TextureCubeMapPtr texture;
   State():
       layerTextureHandle(0)
@@ -116,7 +118,7 @@ struct Skybox::State {
       }
 
 
-      texture = LoadTextureCube(aContext, basePath);
+      texture = LoadTextureCube(aContext, basePath, extension);
       vrb::RenderStatePtr state = geometry->GetRenderState();
       state->SetTexture(texture);
       state->SetMaterial(Color(1.0f, 1.0f, 1.0f), Color(1.0f, 1.0f, 1.0f), Color(0.0f, 0.0f, 0.0f),
@@ -135,19 +137,20 @@ struct Skybox::State {
       return;
     }
     vrb::CreationContextPtr create = context.lock();
-    texture = LoadTextureCube(create, basePath, layerTextureHandle);
+    texture = LoadTextureCube(create, basePath, extension, layerTextureHandle);
     texture->Bind();
     layer->SetLoaded(true);
   }
 };
 
 void
-Skybox::Load(const vrb::ModelLoaderAndroidPtr& aLoader, const std::string& aBasePath) {
+Skybox::Load(const vrb::ModelLoaderAndroidPtr& aLoader, const std::string& aBasePath, const std::string& aExtension) {
   if (m.basePath == aBasePath) {
     return;
   }
   m.loader = aLoader;
   m.basePath = aBasePath;
+  m.extension = aExtension;
   if (m.layer) {
     m.LoadLayer();
   } else {
diff --git a/app/src/main/cpp/Skybox.h b/app/src/main/cpp/Skybox.h
index b196d80b8..5234ffb88 100644
--- a/app/src/main/cpp/Skybox.h
+++ b/app/src/main/cpp/Skybox.h
@@ -20,7 +20,7 @@ typedef std::shared_ptr<VRLayerCube> VRLayerCubePtr;
 class Skybox {
 public:
   static SkyboxPtr Create(vrb::CreationContextPtr aContext, const VRLayerCubePtr& aLayer = nullptr);
-  void Load(const vrb::ModelLoaderAndroidPtr& aLoader, const std::string &basePath);
+  void Load(const vrb::ModelLoaderAndroidPtr& aLoader, const std::string& aBasePath, const std::string& aExtension);
   void SetVisible(bool aVisible);
   void SetTransform(const vrb::Matrix& aTransform);
   void SetTintColor(const vrb::Color& aTintColor);
diff --git a/app/src/main/cpp/vrb b/app/src/main/cpp/vrb
index 18a5830d3..01c7f9e5d 160000
--- a/app/src/main/cpp/vrb
+++ b/app/src/main/cpp/vrb
@@ -1 +1 @@
-Subproject commit 18a5830d3dd75b021caaeee21a0f2da31deab270
+Subproject commit 01c7f9e5d24adcc48f4231ea0243a0b775a3c935
diff --git a/app/src/oculusvr/assets/vr_controller_oculusgo.mtl b/app/src/oculusvr/assets/vr_controller_oculusgo.mtl
index e041297f1..69a4a7bf6 100644
--- a/app/src/oculusvr/assets/vr_controller_oculusgo.mtl
+++ b/app/src/oculusvr/assets/vr_controller_oculusgo.mtl
@@ -10,5 +10,5 @@ Ke 0.000000 0.000000 0.000000
 Ni 1.500000
 d 1.000000
 illum 2
-map_Kd vr_controller_oculusgo_tex.png
-map_Ka vr_controller_oculusgo_tex.png
+map_Kd vr_controller_oculusgo_tex.ktx
+map_Ka vr_controller_oculusgo_tex.ktx
diff --git a/app/src/oculusvr/assets/vr_controller_oculusgo_tex.ktx b/app/src/oculusvr/assets/vr_controller_oculusgo_tex.ktx
new file mode 100644
index 000000000..a5687ca8a
Binary files /dev/null and b/app/src/oculusvr/assets/vr_controller_oculusgo_tex.ktx differ
diff --git a/app/src/oculusvr/cpp/DeviceDelegateOculusVR.cpp b/app/src/oculusvr/cpp/DeviceDelegateOculusVR.cpp
index 9fd38c7dd..784a534f5 100644
--- a/app/src/oculusvr/cpp/DeviceDelegateOculusVR.cpp
+++ b/app/src/oculusvr/cpp/DeviceDelegateOculusVR.cpp
@@ -326,9 +326,10 @@ typedef std::shared_ptr<OculusLayerCube> OculusLayerCubePtr;
 
 class OculusLayerCube: public OculusLayer<VRLayerCubePtr, ovrLayerCube2> {
 public:
-  static OculusLayerCubePtr Create(const VRLayerCubePtr& aLayer) {
+  static OculusLayerCubePtr Create(const VRLayerCubePtr& aLayer, GLint aInternalFormat) {
     auto result = std::make_shared<OculusLayerCube>();
     result->layer = aLayer;
+    result->glFormat = aInternalFormat;
     return result;
   }
 
@@ -341,7 +342,7 @@ class OculusLayerCube: public OculusLayer<VRLayerCubePtr, ovrLayerCube2> {
     ovrLayer.Offset.x = 0.0f;
     ovrLayer.Offset.y = 0.0f;
     ovrLayer.Offset.z = 0.0f;
-    swapChain = vrapi_CreateTextureSwapChain(VRAPI_TEXTURE_TYPE_CUBE, VRAPI_TEXTURE_FORMAT_8888, layer->GetWidth(), layer->GetHeight(), 1, false);
+    swapChain = vrapi_CreateTextureSwapChain3(VRAPI_TEXTURE_TYPE_CUBE, glFormat, layer->GetWidth(), layer->GetHeight(), 1, 1);
     layer->SetTextureHandle(vrapi_GetTextureSwapChainHandle(swapChain, 0));
     OculusLayer::Init();
   }
@@ -375,6 +376,8 @@ class OculusLayerCube: public OculusLayer<VRLayerCubePtr, ovrLayerCube2> {
   const ovrLayerHeader2 * Header() const override {
     return &ovrLayer.Header;
   }
+protected:
+  GLint glFormat;
 };
 
 
@@ -1059,7 +1062,7 @@ DeviceDelegateOculusVR::CreateLayerQuad(int32_t aWidth, int32_t aHeight,
 }
 
 VRLayerCubePtr
-DeviceDelegateOculusVR::CreateLayerCube(int32_t aWidth, int32_t aHeight) {
+DeviceDelegateOculusVR::CreateLayerCube(int32_t aWidth, int32_t aHeight, GLint aInternalFormat) {
   if (!m.layersEnabled) {
     return nullptr;
   }
@@ -1067,7 +1070,7 @@ DeviceDelegateOculusVR::CreateLayerCube(int32_t aWidth, int32_t aHeight) {
     m.cubeLayer->Destroy();
   }
   VRLayerCubePtr layer = VRLayerCube::Create(aWidth, aHeight);
-  m.cubeLayer = OculusLayerCube::Create(layer);
+  m.cubeLayer = OculusLayerCube::Create(layer, aInternalFormat);
   if (m.ovr) {
     m.cubeLayer->Init();
   }
diff --git a/app/src/oculusvr/cpp/DeviceDelegateOculusVR.h b/app/src/oculusvr/cpp/DeviceDelegateOculusVR.h
index 1aac67a34..3da872c6c 100644
--- a/app/src/oculusvr/cpp/DeviceDelegateOculusVR.h
+++ b/app/src/oculusvr/cpp/DeviceDelegateOculusVR.h
@@ -43,7 +43,7 @@ class DeviceDelegateOculusVR : public DeviceDelegate {
   void EndFrame(const bool aDiscard) override;
   VRLayerQuadPtr CreateLayerQuad(int32_t aWidth, int32_t aHeight,
                                  VRLayerQuad::SurfaceType aSurfaceType) override;
-  VRLayerCubePtr CreateLayerCube(int32_t aWidth, int32_t aHeight) override;
+  VRLayerCubePtr CreateLayerCube(int32_t aWidth, int32_t aHeight, GLint aInternalFormat) override;
   VRLayerEquirectPtr CreateLayerEquirect(const VRLayerQuadPtr &aSource) override;
   void DeleteLayer(const VRLayerPtr& aLayer) override;
   // Custom methods for NativeActivity render loop based devices.
diff --git a/app/src/googlevr/assets/vr_controller_daydream_tex.png b/app/src/uncompressed_assets/googlevr/assets/vr_controller_daydream_tex.png
similarity index 100%
rename from app/src/googlevr/assets/vr_controller_daydream_tex.png
rename to app/src/uncompressed_assets/googlevr/assets/vr_controller_daydream_tex.png
diff --git a/app/src/main/assets/cubemap/cave/negx.jpg b/app/src/uncompressed_assets/main/assets/cubemap/cave/negx.jpg
similarity index 100%
rename from app/src/main/assets/cubemap/cave/negx.jpg
rename to app/src/uncompressed_assets/main/assets/cubemap/cave/negx.jpg
diff --git a/app/src/main/assets/cubemap/cave/negy.jpg b/app/src/uncompressed_assets/main/assets/cubemap/cave/negy.jpg
similarity index 100%
rename from app/src/main/assets/cubemap/cave/negy.jpg
rename to app/src/uncompressed_assets/main/assets/cubemap/cave/negy.jpg
diff --git a/app/src/main/assets/cubemap/cave/negz.jpg b/app/src/uncompressed_assets/main/assets/cubemap/cave/negz.jpg
similarity index 100%
rename from app/src/main/assets/cubemap/cave/negz.jpg
rename to app/src/uncompressed_assets/main/assets/cubemap/cave/negz.jpg
diff --git a/app/src/main/assets/cubemap/cave/posx.jpg b/app/src/uncompressed_assets/main/assets/cubemap/cave/posx.jpg
similarity index 100%
rename from app/src/main/assets/cubemap/cave/posx.jpg
rename to app/src/uncompressed_assets/main/assets/cubemap/cave/posx.jpg
diff --git a/app/src/main/assets/cubemap/cave/posy.jpg b/app/src/uncompressed_assets/main/assets/cubemap/cave/posy.jpg
similarity index 100%
rename from app/src/main/assets/cubemap/cave/posy.jpg
rename to app/src/uncompressed_assets/main/assets/cubemap/cave/posy.jpg
diff --git a/app/src/main/assets/cubemap/cave/posz.jpg b/app/src/uncompressed_assets/main/assets/cubemap/cave/posz.jpg
similarity index 100%
rename from app/src/main/assets/cubemap/cave/posz.jpg
rename to app/src/uncompressed_assets/main/assets/cubemap/cave/posz.jpg
diff --git a/app/src/main/assets/cubemap/meadow/negx.jpg b/app/src/uncompressed_assets/main/assets/cubemap/meadow/negx.jpg
similarity index 100%
rename from app/src/main/assets/cubemap/meadow/negx.jpg
rename to app/src/uncompressed_assets/main/assets/cubemap/meadow/negx.jpg
diff --git a/app/src/main/assets/cubemap/meadow/negy.jpg b/app/src/uncompressed_assets/main/assets/cubemap/meadow/negy.jpg
similarity index 100%
rename from app/src/main/assets/cubemap/meadow/negy.jpg
rename to app/src/uncompressed_assets/main/assets/cubemap/meadow/negy.jpg
diff --git a/app/src/main/assets/cubemap/meadow/negz.jpg b/app/src/uncompressed_assets/main/assets/cubemap/meadow/negz.jpg
similarity index 100%
rename from app/src/main/assets/cubemap/meadow/negz.jpg
rename to app/src/uncompressed_assets/main/assets/cubemap/meadow/negz.jpg
diff --git a/app/src/main/assets/cubemap/meadow/posx.jpg b/app/src/uncompressed_assets/main/assets/cubemap/meadow/posx.jpg
similarity index 100%
rename from app/src/main/assets/cubemap/meadow/posx.jpg
rename to app/src/uncompressed_assets/main/assets/cubemap/meadow/posx.jpg
diff --git a/app/src/main/assets/cubemap/meadow/posy.jpg b/app/src/uncompressed_assets/main/assets/cubemap/meadow/posy.jpg
similarity index 100%
rename from app/src/main/assets/cubemap/meadow/posy.jpg
rename to app/src/uncompressed_assets/main/assets/cubemap/meadow/posy.jpg
diff --git a/app/src/main/assets/cubemap/meadow/posz.jpg b/app/src/uncompressed_assets/main/assets/cubemap/meadow/posz.jpg
similarity index 100%
rename from app/src/main/assets/cubemap/meadow/posz.jpg
rename to app/src/uncompressed_assets/main/assets/cubemap/meadow/posz.jpg
diff --git a/app/src/main/assets/cubemap/space/negx.jpg b/app/src/uncompressed_assets/main/assets/cubemap/space/negx.jpg
similarity index 100%
rename from app/src/main/assets/cubemap/space/negx.jpg
rename to app/src/uncompressed_assets/main/assets/cubemap/space/negx.jpg
diff --git a/app/src/main/assets/cubemap/space/negy.jpg b/app/src/uncompressed_assets/main/assets/cubemap/space/negy.jpg
similarity index 100%
rename from app/src/main/assets/cubemap/space/negy.jpg
rename to app/src/uncompressed_assets/main/assets/cubemap/space/negy.jpg
diff --git a/app/src/main/assets/cubemap/space/negz.jpg b/app/src/uncompressed_assets/main/assets/cubemap/space/negz.jpg
similarity index 100%
rename from app/src/main/assets/cubemap/space/negz.jpg
rename to app/src/uncompressed_assets/main/assets/cubemap/space/negz.jpg
diff --git a/app/src/main/assets/cubemap/space/posx.jpg b/app/src/uncompressed_assets/main/assets/cubemap/space/posx.jpg
similarity index 100%
rename from app/src/main/assets/cubemap/space/posx.jpg
rename to app/src/uncompressed_assets/main/assets/cubemap/space/posx.jpg
diff --git a/app/src/main/assets/cubemap/space/posy.jpg b/app/src/uncompressed_assets/main/assets/cubemap/space/posy.jpg
similarity index 100%
rename from app/src/main/assets/cubemap/space/posy.jpg
rename to app/src/uncompressed_assets/main/assets/cubemap/space/posy.jpg
diff --git a/app/src/main/assets/cubemap/space/posz.jpg b/app/src/uncompressed_assets/main/assets/cubemap/space/posz.jpg
similarity index 100%
rename from app/src/main/assets/cubemap/space/posz.jpg
rename to app/src/uncompressed_assets/main/assets/cubemap/space/posz.jpg
diff --git a/app/src/main/assets/spinners_v3.jpg b/app/src/uncompressed_assets/main/assets/spinners_v3.jpg
similarity index 100%
rename from app/src/main/assets/spinners_v3.jpg
rename to app/src/uncompressed_assets/main/assets/spinners_v3.jpg
diff --git a/app/src/oculusvr/assets/vr_controller_oculusgo_tex.png b/app/src/uncompressed_assets/oculusvr/assets/vr_controller_oculusgo_tex.png
similarity index 100%
rename from app/src/oculusvr/assets/vr_controller_oculusgo_tex.png
rename to app/src/uncompressed_assets/oculusvr/assets/vr_controller_oculusgo_tex.png
diff --git a/app/src/wavevr/assets/vr_controller_focus_tex.png b/app/src/uncompressed_assets/wavevr/assets/vr_controller_focus_tex.png
similarity index 100%
rename from app/src/wavevr/assets/vr_controller_focus_tex.png
rename to app/src/uncompressed_assets/wavevr/assets/vr_controller_focus_tex.png
diff --git a/app/src/wavevr/assets/vr_controller_focus.mtl b/app/src/wavevr/assets/vr_controller_focus.mtl
index c5e5df473..ed213e737 100644
--- a/app/src/wavevr/assets/vr_controller_focus.mtl
+++ b/app/src/wavevr/assets/vr_controller_focus.mtl
@@ -10,5 +10,5 @@ Ke 0.000000 0.000000 0.000000
 Ni 1.500000
 d 1.000000
 illum 2
-map_Kd vr_controller_focus_tex.png
-map_Ka vr_controller_focus_tex.png
+map_Kd vr_controller_focus_tex.ktx
+map_Ka vr_controller_focus_tex.ktx
diff --git a/app/src/wavevr/assets/vr_controller_focus_tex.ktx b/app/src/wavevr/assets/vr_controller_focus_tex.ktx
new file mode 100644
index 000000000..1cb07d2f1
Binary files /dev/null and b/app/src/wavevr/assets/vr_controller_focus_tex.ktx differ
diff --git a/tools/compressor/gulpfile.js b/tools/compressor/gulpfile.js
new file mode 100644
index 000000000..f2f59346d
--- /dev/null
+++ b/tools/compressor/gulpfile.js
@@ -0,0 +1,80 @@
+const fs = require('fs');
+const path = require('path');
+const gulp = require('gulp');
+const sharp = require('sharp');
+const tmp = require('tmp');
+const execSync = require('child_process').execSync;
+const readdirp = require('readdirp');
+
+const assetsPath = '../../app/src/uncompressed_assets';
+const assetFilter = ['*.jpg', '*.jpeg', '*.png'];
+
+function compressAsset(source, target, rgba, done) {
+    if (fs.existsSync(target)) {
+        console.log("Already compressed: " + target);
+        done();
+        return;
+    }
+
+    const extension = path.extname(source);
+    if (extension !== ".png") {
+        // Etc2Tool requires png format
+        const tempImage = tmp.tmpNameSync() + ".png";
+        sharp(source)
+        .toFile(tempImage)
+        .then(data => {
+            compressAsset(tempImage, target, false, done);
+        })
+        .catch(err => {
+            console.log("PNG conversion failed for " + source + ": " + err);
+            done(err);
+        });
+        return;
+    }
+
+    try {
+        console.log("About to compress: " + target);
+        var format = rgba ? "RGBA8" : "RGB8";
+        var out = execSync(`EtcTool ${source} -output ${target} -format ${format} -effort 100 -v`).toString();
+        console.log(out);
+        done();
+    } catch (err) {
+        console.error(err.message);
+        done(err);
+    }
+}
+
+gulp.task('compress', function(done) {
+    let pending = 0;
+    let finished = false;
+    const settings = {
+        root: assetsPath,
+        fileFilter: assetFilter
+    };
+    readdirp(settings)
+    .on('data', function (entry) {
+        pending++;
+        const name = entry.fullPath;
+        const extension = path.extname(name);
+        let target = name.slice(0, -extension.length) + ".ktx";
+        target = target.replace("uncompressed_assets/", "");
+        compressAsset(name, target, true, function() {
+            pending--;
+            if (finished && !pending) {
+                done();
+            }
+        });
+    })
+    .on('warn', function(warn){
+        console.log("Warn: ", warn);
+    })
+    .on('error', function(err){
+        console.log("Error: ", err);
+    })
+    .on('end', function(){
+        finished = true;
+        if (!pending) {
+            done();
+        }
+    });
+});
\ No newline at end of file
diff --git a/tools/compressor/package.json b/tools/compressor/package.json
new file mode 100644
index 000000000..b0a821f52
--- /dev/null
+++ b/tools/compressor/package.json
@@ -0,0 +1,24 @@
+{
+  "name": "fxr-compressor",
+  "version": "1.0.0",
+  "description": "FxR asset compressor",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [
+    "fxr",
+    "asset",
+    "compressor"
+  ],
+  "author": "Mozilla",
+  "license": "Apache-2.0",
+  "devDependencies": {
+    "gulp": "^4.0.0"
+  },
+  "dependencies": {
+    "readdirp": "^2.2.1",
+    "sharp": "^0.21.1",
+    "tmp": "0.0.33"
+  }
+}