diff --git a/thermion_dart/lib/src/bindings/src/thermion_dart_ffi.g.dart b/thermion_dart/lib/src/bindings/src/thermion_dart_ffi.g.dart
index 027f09db..cde3c2ec 100644
--- a/thermion_dart/lib/src/bindings/src/thermion_dart_ffi.g.dart
+++ b/thermion_dart/lib/src/bindings/src/thermion_dart_ffi.g.dart
@@ -729,6 +729,23 @@ external void Texture_generateMipMaps(
   ffi.Pointer<TEngine> tEngine,
 );
 
+@ffi.Native<
+    ffi.Pointer<TTexture> Function(
+        ffi.Pointer<TEngine>,
+        ffi.Pointer<ffi.Uint8>,
+        ffi.Size,
+        ffi.Pointer<ffi.Float>,
+        ffi.Uint32,
+        VoidCallback)>(isLeaf: true)
+external ffi.Pointer<TTexture> Texture_decodeKtx(
+  ffi.Pointer<TEngine> tEngine,
+  ffi.Pointer<ffi.Uint8> ktxData,
+  int length,
+  ffi.Pointer<ffi.Float> sphericalHarmonics,
+  int requestId,
+  VoidCallback onTextureUploadComplete,
+);
+
 @ffi.Native<
     ffi.Pointer<TLinearImage> Function(
         ffi.Uint32, ffi.Uint32, ffi.Uint32)>(isLeaf: true)
@@ -1558,30 +1575,20 @@ external ffi.Pointer<TScene> Engine_createScene(
 
 @ffi.Native<
     ffi.Pointer<TSkybox> Function(
-        ffi.Pointer<TEngine>,
-        ffi.Pointer<ffi.Uint8>,
-        ffi.Size,
-        ffi.Pointer<ffi.NativeFunction<ffi.Void Function()>>)>(isLeaf: true)
+        ffi.Pointer<TEngine>, ffi.Pointer<TTexture>)>(isLeaf: true)
 external ffi.Pointer<TSkybox> Engine_buildSkybox(
   ffi.Pointer<TEngine> tEngine,
-  ffi.Pointer<ffi.Uint8> ktxData,
-  int length,
-  ffi.Pointer<ffi.NativeFunction<ffi.Void Function()>> onTextureUploadComplete,
+  ffi.Pointer<TTexture> tTexture,
 );
 
 @ffi.Native<
-    ffi.Pointer<TIndirectLight> Function(
-        ffi.Pointer<TEngine>,
-        ffi.Pointer<ffi.Uint8>,
-        ffi.Size,
-        ffi.Float,
-        ffi.Pointer<ffi.NativeFunction<ffi.Void Function()>>)>(isLeaf: true)
+    ffi.Pointer<TIndirectLight> Function(ffi.Pointer<TEngine>,
+        ffi.Pointer<TTexture>, ffi.Float, ffi.Pointer<ffi.Float>)>(isLeaf: true)
 external ffi.Pointer<TIndirectLight> Engine_buildIndirectLight(
   ffi.Pointer<TEngine> tEngine,
-  ffi.Pointer<ffi.Uint8> ktxData,
-  int length,
+  ffi.Pointer<TTexture> tTexture,
   double intensity,
-  ffi.Pointer<ffi.NativeFunction<ffi.Void Function()>> onTextureUploadComplete,
+  ffi.Pointer<ffi.Float> harmonics,
 );
 
 @ffi.Native<ffi.Void Function(ffi.Pointer<TEngine>, ffi.Pointer<TSkybox>)>(
@@ -1887,6 +1894,28 @@ external void Texture_generateMipMapsRenderThread(
   VoidCallback onComplete,
 );
 
+@ffi.Native<
+        ffi.Void Function(
+            ffi.Pointer<TEngine>,
+            ffi.Pointer<ffi.Uint8>,
+            ffi.Size,
+            ffi.Pointer<ffi.Float>,
+            ffi.Uint32,
+            VoidCallback,
+            ffi.Pointer<
+                ffi.NativeFunction<ffi.Void Function(ffi.Pointer<TTexture>)>>)>(
+    isLeaf: true)
+external void Texture_decodeKtxRenderThread(
+  ffi.Pointer<TEngine> tEngine,
+  ffi.Pointer<ffi.Uint8> ktxData,
+  int length,
+  ffi.Pointer<ffi.Float> sphericalHarmonics,
+  int requestId,
+  VoidCallback onTextureUploadComplete,
+  ffi.Pointer<ffi.NativeFunction<ffi.Void Function(ffi.Pointer<TTexture>)>>
+      onComplete,
+);
+
 @ffi.Native<
     ffi.Void Function(ffi.Pointer<TEngine>, ffi.Pointer<TTexture>, ffi.Uint32,
         VoidCallback)>(isLeaf: true)
@@ -1936,40 +1965,36 @@ external void Engine_executeRenderThread(
 );
 
 @ffi.Native<
-    ffi.Void Function(
-        ffi.Pointer<TEngine>,
-        ffi.Pointer<ffi.Uint8>,
-        ffi.Size,
-        ffi.Pointer<
-            ffi.NativeFunction<ffi.Void Function(ffi.Pointer<TSkybox>)>>,
-        ffi.Pointer<ffi.NativeFunction<ffi.Void Function()>>)>(isLeaf: true)
+        ffi.Void Function(
+            ffi.Pointer<TEngine>,
+            ffi.Pointer<TTexture>,
+            ffi.Pointer<
+                ffi.NativeFunction<ffi.Void Function(ffi.Pointer<TSkybox>)>>)>(
+    isLeaf: true)
 external void Engine_buildSkyboxRenderThread(
   ffi.Pointer<TEngine> tEngine,
-  ffi.Pointer<ffi.Uint8> skyboxData,
-  int length,
+  ffi.Pointer<TTexture> tTexture,
   ffi.Pointer<ffi.NativeFunction<ffi.Void Function(ffi.Pointer<TSkybox>)>>
       onComplete,
-  ffi.Pointer<ffi.NativeFunction<ffi.Void Function()>> onTextureUploadComplete,
 );
 
 @ffi.Native<
     ffi.Void Function(
         ffi.Pointer<TEngine>,
-        ffi.Pointer<ffi.Uint8>,
-        ffi.Size,
+        ffi.Pointer<TTexture>,
         ffi.Float,
+        ffi.Pointer<ffi.Float>,
         ffi.Pointer<
-            ffi.NativeFunction<ffi.Void Function(ffi.Pointer<TIndirectLight>)>>,
-        ffi.Pointer<ffi.NativeFunction<ffi.Void Function()>>)>(isLeaf: true)
+            ffi.NativeFunction<
+                ffi.Void Function(ffi.Pointer<TIndirectLight>)>>)>(isLeaf: true)
 external void Engine_buildIndirectLightRenderThread(
   ffi.Pointer<TEngine> tEngine,
-  ffi.Pointer<ffi.Uint8> iblData,
-  int length,
+  ffi.Pointer<TTexture> tTexture,
   double intensity,
+  ffi.Pointer<ffi.Float> harmonics,
   ffi.Pointer<
           ffi.NativeFunction<ffi.Void Function(ffi.Pointer<TIndirectLight>)>>
       onComplete,
-  ffi.Pointer<ffi.NativeFunction<ffi.Void Function()>> onTextureUploadComplete,
 );
 
 @ffi.Native<
@@ -3045,6 +3070,13 @@ external void RenderableManager_setPriority(
   int priority,
 );
 
+@ffi.Native<Aabb3 Function(ffi.Pointer<TRenderableManager>, EntityId)>(
+    isLeaf: true)
+external Aabb3 RenderableManager_getBoundingBox(
+  ffi.Pointer<TRenderableManager> tRenderableManager,
+  int entityId,
+);
+
 @ffi.Native<
     ffi.Pointer<TSceneAsset> Function(
         ffi.Pointer<TEngine>,
@@ -3462,6 +3494,9 @@ external bool AnimationManager_setGltfAnimationFrame(
   int frame,
 );
 
+typedef VoidCallbackFunction = ffi.Void Function(ffi.Int32 requestId);
+typedef DartVoidCallbackFunction = void Function(int requestId);
+typedef VoidCallback = ffi.Pointer<ffi.NativeFunction<VoidCallbackFunction>>;
 typedef EntityId = ffi.Int32;
 typedef DartEntityId = int;
 
@@ -4094,9 +4129,6 @@ sealed class TBackend {
   static const BACKEND_NOOP = 4;
 }
 
-typedef VoidCallbackFunction = ffi.Void Function(ffi.Int32 requestId);
-typedef DartVoidCallbackFunction = void Function(int requestId);
-typedef VoidCallback = ffi.Pointer<ffi.NativeFunction<VoidCallbackFunction>>;
 typedef FilamentRenderCallbackFunction = ffi.Void Function(
     ffi.Pointer<ffi.Void> owner);
 typedef DartFilamentRenderCallbackFunction = void Function(
diff --git a/thermion_dart/lib/src/viewer/src/ffi/src/thermion_viewer_ffi.dart b/thermion_dart/lib/src/viewer/src/ffi/src/thermion_viewer_ffi.dart
index 67d0671c..bc05bec1 100644
--- a/thermion_dart/lib/src/viewer/src/ffi/src/thermion_viewer_ffi.dart
+++ b/thermion_dart/lib/src/viewer/src/ffi/src/thermion_viewer_ffi.dart
@@ -1,5 +1,6 @@
 import 'dart:async';
 import 'package:thermion_dart/src/filament/src/implementation/background_image.dart';
+import 'package:thermion_dart/src/filament/src/implementation/ffi_texture.dart';
 import '../../../../filament/src/implementation/ffi_asset.dart';
 import 'package:thermion_dart/src/filament/src/implementation/ffi_filament_app.dart';
 import '../../../../filament/src/implementation/ffi_scene.dart';
@@ -232,56 +233,83 @@ class ThermionViewerFFI extends ThermionViewer {
     throw UnimplementedError();
   }
 
+  Future? _skyboxTextureUploadComplete;
+  FFITexture? _skyboxTexture;
+  Pointer<TSkybox>? _skybox;
+
   ///
   ///
   ///
   @override
   Future loadSkybox(String skyboxPath) async {
+    await removeSkybox();
+
     var data = await FilamentApp.instance!.loadResource(skyboxPath);
 
-    skybox = await withPointerCallback<TSkybox>((cb) {
-      Engine_buildSkyboxRenderThread(
-        app.engine,
-        data.address,
-        data.length,
-        cb,
-        nullptr,
-      );
+    final completer = Completer();
+
+    _skyboxTextureUploadComplete =
+        withVoidCallback((requestId, onTextureUploadComplete) async {
+      var skyboxTexturePointer = await withPointerCallback<TTexture>((cb) {
+        Texture_decodeKtxRenderThread(app.engine, data.address, data.length,
+            nullptr, requestId, onTextureUploadComplete, cb);
+      });
+      _skyboxTexture = FFITexture(app.engine, skyboxTexturePointer);
+
+      _skybox = await withPointerCallback<TSkybox>((cb) {
+        Engine_buildSkyboxRenderThread(app.engine, _skyboxTexture!.pointer, cb);
+      });
+      Scene_setSkybox(scene.scene, _skybox!);
+      completer.complete();
+    }).then((_) async {
+      _skyboxTextureUploadComplete = null;
     });
-    Scene_setSkybox(scene.scene, skybox!);
+    await completer.future;
   }
 
-  Pointer<TIndirectLight>? indirectLight;
-
-  Pointer<TSkybox>? skybox;
+  Pointer<TTexture>? _iblTexture;
+  Pointer<TIndirectLight>? _indirectLight;
+  Future? _iblTextureUploadComplete;
 
   ///
   ///
   ///
   @override
   Future loadIbl(String lightingPath, {double intensity = 30000}) async {
-    late Pointer stackPtr;
-    if (FILAMENT_WASM) {
-      //stackPtr = stackSave();
-    }
-    var data = await FilamentApp.instance!.loadResource(lightingPath);
+    await removeIbl();
 
-    indirectLight = await withPointerCallback<TIndirectLight>((cb) {
-      Engine_buildIndirectLightRenderThread(
-        app.engine,
-        data.address,
-        data.length,
-        intensity,
-        cb,
-        nullptr,
-      );
-    });
-    if (FILAMENT_WASM) {
-      //stackRestore(stackPtr);
+    final completer = Completer();
+    _iblTextureUploadComplete =
+        withVoidCallback((requestId, onTextureUploadComplete) async {
+      late Pointer stackPtr;
+      if (FILAMENT_WASM) {
+        //stackPtr = stackSave();
+      }
+
+      var data = await FilamentApp.instance!.loadResource(lightingPath);
+
+      var harmonics = Float32List(27);
+
+      _iblTexture = await withPointerCallback<TTexture>((cb) {
+        Texture_decodeKtxRenderThread(app.engine, data.address, data.length,
+            harmonics.address, requestId, onTextureUploadComplete, cb);
+      });
+
+      _indirectLight = await withPointerCallback<TIndirectLight>((cb) {
+        Engine_buildIndirectLightRenderThread(
+            app.engine, _iblTexture!, intensity, harmonics.address, cb);
+      });
+      if (FILAMENT_WASM) {
+        //stackRestore(stackPtr);
+        data.free();
+      }
       data.free();
-    }
-    data.free();
-    Scene_setIndirectLight(scene.scene, indirectLight!);
+      Scene_setIndirectLight(scene.scene, _indirectLight!);
+      completer.complete();
+    }).then((_) {
+      _iblTextureUploadComplete = null;
+    });
+    await completer.future;
   }
 
   ///
@@ -289,7 +317,7 @@ class ThermionViewerFFI extends ThermionViewer {
   ///
   @override
   Future rotateIbl(Matrix3 rotationMatrix) async {
-    if (indirectLight == null) {
+    if (_indirectLight == null) {
       throw Exception("No IBL loaded");
     }
 
@@ -298,7 +326,7 @@ class ThermionViewerFFI extends ThermionViewer {
       //stackPtr = stackSave();
     }
 
-    IndirectLight_setRotation(indirectLight!, rotationMatrix.storage.address);
+    IndirectLight_setRotation(_indirectLight!, rotationMatrix.storage.address);
 
     if (FILAMENT_WASM) {
       //stackRestore(stackPtr);
@@ -315,17 +343,23 @@ class ThermionViewerFFI extends ThermionViewer {
       throw ViewerDisposedException();
     }
 
-    if (skybox != null) {
+    if (_skyboxTextureUploadComplete != null) {
+      await _skyboxTextureUploadComplete;
+      _skyboxTextureUploadComplete = null;
+    }
+
+    if (_skybox != null) {
       await withVoidCallback(
         (requestId, cb) => Engine_destroySkyboxRenderThread(
           app.engine,
-          skybox!,
+          _skybox!,
           requestId,
           cb,
         ),
       );
-      skybox = null;
     }
+    _skybox = null;
+    _skyboxTexture = null;
   }
 
   ///
@@ -333,17 +367,22 @@ class ThermionViewerFFI extends ThermionViewer {
   ///
   @override
   Future removeIbl() async {
-    if (indirectLight != null) {
+    if (_iblTextureUploadComplete != null) {
+      await _iblTextureUploadComplete!;
+      _iblTextureUploadComplete = null;
+    }
+    if (_indirectLight != null) {
       Scene_setIndirectLight(scene.scene, nullptr);
       await withVoidCallback(
         (requestId, cb) => Engine_destroyIndirectLightRenderThread(
           app.engine,
-          indirectLight!,
+          _indirectLight!,
           requestId,
           cb,
         ),
       );
-      indirectLight = null;
+      _indirectLight = null;
+      _iblTexture = null;
     }
   }
 
diff --git a/thermion_dart/native/include/c_api/TEngine.h b/thermion_dart/native/include/c_api/TEngine.h
index 1d8fbfd8..6da0a1fd 100644
--- a/thermion_dart/native/include/c_api/TEngine.h
+++ b/thermion_dart/native/include/c_api/TEngine.h
@@ -57,8 +57,8 @@ EMSCRIPTEN_KEEPALIVE TMaterial *Engine_buildMaterial(TEngine *tEngine, const uin
 EMSCRIPTEN_KEEPALIVE void Engine_destroyMaterial(TEngine *tEngine, TMaterial *tMaterial);
 EMSCRIPTEN_KEEPALIVE void Engine_destroyMaterialInstance(TEngine *tEngine, TMaterialInstance *tMaterialInstance);
 EMSCRIPTEN_KEEPALIVE TScene *Engine_createScene(TEngine *tEngine);
-EMSCRIPTEN_KEEPALIVE TSkybox *Engine_buildSkybox(TEngine *tEngine, uint8_t* ktxData, size_t length, void(*onTextureUploadComplete)());
-EMSCRIPTEN_KEEPALIVE TIndirectLight *Engine_buildIndirectLight(TEngine *tEngine, uint8_t* ktxData, size_t length, float intensity, void(*onTextureUploadComplete)());
+EMSCRIPTEN_KEEPALIVE TSkybox *Engine_buildSkybox(TEngine *tEngine, TTexture* tTexture);
+EMSCRIPTEN_KEEPALIVE TIndirectLight *Engine_buildIndirectLight(TEngine *tEngine, TTexture* tTexture, float intensity, float *harmonics);
 EMSCRIPTEN_KEEPALIVE void Engine_destroySkybox(TEngine *tEngine, TSkybox *tSkybox);
 EMSCRIPTEN_KEEPALIVE void Engine_destroyIndirectLight(TEngine *tEngine, TIndirectLight *tIndirectLight);
 EMSCRIPTEN_KEEPALIVE EntityId EntityManager_createEntity(TEntityManager *tEntityManager);
diff --git a/thermion_dart/native/include/c_api/TTexture.h b/thermion_dart/native/include/c_api/TTexture.h
index 360d3beb..2e708fe2 100644
--- a/thermion_dart/native/include/c_api/TTexture.h
+++ b/thermion_dart/native/include/c_api/TTexture.h
@@ -260,7 +260,14 @@ EMSCRIPTEN_KEEPALIVE uint32_t Texture_getHeight(TTexture *tTexture, uint32_t lev
 EMSCRIPTEN_KEEPALIVE uint32_t Texture_getDepth(TTexture *tTexture, uint32_t level);
 EMSCRIPTEN_KEEPALIVE TTextureUsage Texture_getUsage(TTexture *tTexture, uint32_t level);
 EMSCRIPTEN_KEEPALIVE void Texture_generateMipMaps(TTexture *tTexture, TEngine *tEngine);
-
+EMSCRIPTEN_KEEPALIVE TTexture* Texture_decodeKtx(
+    TEngine *tEngine,
+    uint8_t *ktxData,
+    size_t length,
+    float *sphericalHarmonics,
+    uint32_t requestId,
+    VoidCallback onTextureUploadComplete
+);
 EMSCRIPTEN_KEEPALIVE TLinearImage *Image_createEmpty(uint32_t width,uint32_t height,uint32_t channel);
 EMSCRIPTEN_KEEPALIVE TLinearImage *Image_decode(uint8_t* data, size_t length, const char* name, bool alpha);
 EMSCRIPTEN_KEEPALIVE float *Image_getBytes(TLinearImage *tLinearImage);
diff --git a/thermion_dart/native/include/c_api/ThermionDartRenderThreadApi.h b/thermion_dart/native/include/c_api/ThermionDartRenderThreadApi.h
index 872f27d6..fd246315 100644
--- a/thermion_dart/native/include/c_api/ThermionDartRenderThreadApi.h
+++ b/thermion_dart/native/include/c_api/ThermionDartRenderThreadApi.h
@@ -1,5 +1,7 @@
 #pragma once
 
+#include "APIBoundaryTypes.h"
+
 #include "TEngine.h"
 #include "TView.h"
 #include "TTexture.h"
@@ -11,7 +13,6 @@ namespace thermion
     extern "C"
     {
 #endif
-        typedef void (*VoidCallback)(int32_t requestId);
         typedef int32_t EntityId;
         typedef void (*FilamentRenderCallback)(void *const owner);
 
@@ -59,14 +60,15 @@ namespace thermion
             void (*onComplete)(TTexture*)
         );
         void Texture_generateMipMapsRenderThread(TTexture *tTexture, TEngine *tEngine, uint32_t requestId, VoidCallback onComplete);
+        void Texture_decodeKtxRenderThread(TEngine *tEngine, uint8_t *ktxData, size_t length, float *sphericalHarmonics, uint32_t requestId, VoidCallback onTextureUploadComplete, void (*onComplete)(TTexture *));
 
         void Engine_destroyTextureRenderThread(TEngine *engine, TTexture* tTexture, uint32_t requestId,  VoidCallback onComplete);
         void Engine_createFenceRenderThread(TEngine *tEngine, void (*onComplete)(TFence*));
         void Engine_destroyFenceRenderThread(TEngine *tEngine, TFence *tFence, uint32_t requestId,  VoidCallback onComplete);
         void Engine_flushAndWaitRenderThread(TEngine *tEngine, uint32_t requestId,  VoidCallback onComplete);
         void Engine_executeRenderThread(TEngine *tEngine, uint32_t requestId,  VoidCallback onComplete);
-        void Engine_buildSkyboxRenderThread(TEngine *tEngine, uint8_t *skyboxData, size_t length, void (*onComplete)(TSkybox *), void (*onTextureUploadComplete)());
-        void Engine_buildIndirectLightRenderThread(TEngine *tEngine, uint8_t *iblData, size_t length, float intensity, void (*onComplete)(TIndirectLight *), void (*onTextureUploadComplete)());
+        void Engine_buildSkyboxRenderThread(TEngine *tEngine, TTexture *tTexture, void (*onComplete)(TSkybox *));
+        void Engine_buildIndirectLightRenderThread(TEngine *tEngine, TTexture *tTexture, float intensity, float *harmonics, void (*onComplete)(TIndirectLight *));
 
         void Renderer_setClearOptionsRenderThread(TRenderer *tRenderer, double clearR, double clearG, double clearB, double clearA, uint8_t clearStencil, bool clear, bool discard, uint32_t requestId,  VoidCallback onComplete);
         void Renderer_beginFrameRenderThread(TRenderer *tRenderer, TSwapChain *tSwapChain, uint64_t frameTimeInNanos, void (*onComplete)(bool));
diff --git a/thermion_dart/native/src/c_api/TEngine.cpp b/thermion_dart/native/src/c_api/TEngine.cpp
index e8bc00e5..fb22b303 100644
--- a/thermion_dart/native/src/c_api/TEngine.cpp
+++ b/thermion_dart/native/src/c_api/TEngine.cpp
@@ -303,40 +303,11 @@ namespace thermion
             return reinterpret_cast<TScene *>(scene);
         }
 
-        EMSCRIPTEN_KEEPALIVE TSkybox *Engine_buildSkybox(TEngine *tEngine, uint8_t *ktxData, size_t length, void (*onTextureUploadComplete)())
+        EMSCRIPTEN_KEEPALIVE TSkybox *Engine_buildSkybox(TEngine *tEngine, TTexture *tTexture)
         {
             auto *engine = reinterpret_cast<Engine *>(tEngine);
-            auto copy = new std::vector<uint8_t>(ktxData, ktxData + length);
-            image::Ktx1Bundle *skyboxBundle =
-                new image::Ktx1Bundle(static_cast<const uint8_t *>(copy->data()),
-                                      static_cast<uint32_t>(length));
-
-            std::vector<void *> *callbackData = new std::vector<void *>{
-                reinterpret_cast<void *>(onTextureUploadComplete),
-                reinterpret_cast<void *>(skyboxBundle),
-                reinterpret_cast<void *>(copy)};
-
-            auto *texture =
-                ktxreader::Ktx1Reader::createTexture(
-                    engine, *skyboxBundle, false, [](void *userdata)
-                    {
-                        std::vector<void*>* vec = (std::vector<void*>*)userdata;
-                        
-                        void *callbackPtr = vec->at(0);
-                        image::Ktx1Bundle *skyboxBundle = reinterpret_cast<image::Ktx1Bundle *>(vec->at(1));
-                        std::vector<uint8_t> *copy = reinterpret_cast<std::vector<uint8_t>*>(vec->at(2));
-
-                        delete vec;
-                        
-                        if (callbackPtr)
-                        {
-                          void (*callback)(void) = (void (*)(void))callbackPtr;
-                          callback();
-                        } 
-                        delete skyboxBundle;
-                        delete copy; 
-                    },
-                    (void *)callbackData);
+            auto *texture = reinterpret_cast<Texture *>(tTexture);
+            
             auto *skybox =
                 filament::Skybox::Builder()
                     .environment(texture)
@@ -345,48 +316,17 @@ namespace thermion
             return reinterpret_cast<TSkybox *>(skybox);
         }
 
-        EMSCRIPTEN_KEEPALIVE TIndirectLight *Engine_buildIndirectLight(TEngine *tEngine, uint8_t *ktxData, size_t length, float intensity, void (*onTextureUploadComplete)())
+        EMSCRIPTEN_KEEPALIVE TIndirectLight *Engine_buildIndirectLight(TEngine *tEngine, TTexture *tTexture, float intensity, float *harmonics)
         {
             auto *engine = reinterpret_cast<Engine *>(tEngine);
-            auto copy = new std::vector<uint8_t>(ktxData, ktxData + length);
+            auto *texture = reinterpret_cast<Texture *>(tTexture);
 
-            image::Ktx1Bundle *iblBundle =
-                new image::Ktx1Bundle(static_cast<const uint8_t *>(copy->data()),
-                                      static_cast<uint32_t>(length));
-            filament::math::float3 harmonics[9];
-            iblBundle->getSphericalHarmonics(harmonics);
+            filament::math::float3 sphericalHarmonics[9];
+            memcpy(sphericalHarmonics, harmonics, 27 * sizeof(float));
 
-
-            std::vector<void *> *callbackData = new std::vector<void *>{
-                reinterpret_cast<void *>(onTextureUploadComplete),
-                reinterpret_cast<void *>(iblBundle),
-                reinterpret_cast<void *>(copy)};
-
-            auto *texture =
-                ktxreader::Ktx1Reader::createTexture(
-                    engine, *iblBundle, false, [](void *userdata)
-                    {
-                        std::vector<void*>* vec = (std::vector<void*>*)userdata;
-                        
-                        void *callbackPtr = vec->at(0);
-                        image::Ktx1Bundle *iblBundle = reinterpret_cast<image::Ktx1Bundle *>(vec->at(1));
-                        std::vector<uint8_t> *copy = reinterpret_cast<std::vector<uint8_t>*>(vec->at(2));
-
-                        delete vec;
-                        
-                        if (callbackPtr)
-                        {
-                          void (*callback)(void) = (void (*)(void))callbackPtr;
-                          callback();
-                        } 
-                        delete iblBundle;
-                        delete copy;                     
-                },
-
-                (void *)callbackData);
             auto *indirectLight = filament::IndirectLight::Builder()
                                       .reflections(texture)
-                                      .irradiance(3, harmonics)
+                                      .irradiance(3, sphericalHarmonics)
                                       .intensity(intensity)
                                       .build(*engine);
             return reinterpret_cast<TIndirectLight *>(indirectLight);
diff --git a/thermion_dart/native/src/c_api/TTexture.cpp b/thermion_dart/native/src/c_api/TTexture.cpp
index cdb0431f..e8a7e28f 100644
--- a/thermion_dart/native/src/c_api/TTexture.cpp
+++ b/thermion_dart/native/src/c_api/TTexture.cpp
@@ -1,6 +1,6 @@
 #ifdef __EMSCRIPTEN__
 #include <emscripten.h>
-#endif 
+#endif
 
 #include <vector>
 
@@ -17,6 +17,9 @@
 #include <filament/image/ColorTransform.h>
 #include <filament/backend/DriverEnums.h>
 
+#include <ktxreader/Ktx1Reader.h>
+#include <ktxreader/Ktx2Reader.h>
+
 #include "c_api/TTexture.h"
 
 #include "Log.hpp"
@@ -32,61 +35,117 @@ namespace thermion
         using namespace filament::backend;
         using namespace image;
 
-
 #endif
 
-    inline float to_float(uint8_t v) {
-        return float(v);
-    }
-
-
-    EMSCRIPTEN_KEEPALIVE TLinearImage *Image_decode(uint8_t *data, size_t length, const char *name = "image", bool alpha = true)
-    {
-
-        auto start = std::chrono::high_resolution_clock::now();
-
-        int width, height, channels;
-
-        TRACE("Loading image from buffer of length %lu bytes (alpha : %s)", length, alpha ? "true" : "false");
-        
-        uint8_t *imgData = stbi_load_from_memory(data, length, &width, &height, &channels, alpha ? 4 : 3);
-        
-        if (!imgData) {
-            ERROR("Failed to decode image");
-            return nullptr;
-        }
-        
-        LinearImage *linearImage;
-        
-        if(alpha) {
-            linearImage = new LinearImage(toLinearWithAlpha<uint8_t>(
-                width,
-                height, 
-                width * 4,
-                imgData,
-                to_float, sRGBToLinear<filament::math::float4>));
-        } else {
-            linearImage = new LinearImage(toLinear<uint8_t>(
-                width,
-                height,
-                width * 3,
-                imgData,
-                to_float, sRGBToLinear<filament::math::float3>));
-        }
-
-        auto end = std::chrono::high_resolution_clock::now();
-        auto duration = std::chrono::duration_cast<std::chrono::milliseconds>(end - start);
-
-        TRACE("Image decoded successfully in %lld ms (%dx%dx%d)", duration.count(), width, height, channels);        
-        
-        if (!linearImage->isValid())
+        inline float to_float(uint8_t v)
         {
-            Log("Failed to decode image.");
-            return nullptr;
+            return float(v);
+        }
+
+        EMSCRIPTEN_KEEPALIVE TLinearImage *Image_decode(uint8_t *data, size_t length, const char *name = "image", bool alpha = true)
+        {
+
+            auto start = std::chrono::high_resolution_clock::now();
+
+            int width, height, channels;
+
+            TRACE("Loading image from buffer of length %lu bytes (alpha : %s)", length, alpha ? "true" : "false");
+
+            uint8_t *imgData = stbi_load_from_memory(data, length, &width, &height, &channels, alpha ? 4 : 3);
+
+            if (!imgData)
+            {
+                ERROR("Failed to decode image");
+                return nullptr;
+            }
+
+            LinearImage *linearImage;
+
+            if (alpha)
+            {
+                linearImage = new LinearImage(toLinearWithAlpha<uint8_t>(
+                    width,
+                    height,
+                    width * 4,
+                    imgData,
+                    to_float, sRGBToLinear<filament::math::float4>));
+            }
+            else
+            {
+                linearImage = new LinearImage(toLinear<uint8_t>(
+                    width,
+                    height,
+                    width * 3,
+                    imgData,
+                    to_float, sRGBToLinear<filament::math::float3>));
+            }
+
+            auto end = std::chrono::high_resolution_clock::now();
+            auto duration = std::chrono::duration_cast<std::chrono::milliseconds>(end - start);
+
+            TRACE("Image decoded successfully in %lld ms (%dx%dx%d)", duration.count(), width, height, channels);
+
+            if (!linearImage->isValid())
+            {
+                Log("Failed to decode image.");
+                return nullptr;
+            }
+
+            return reinterpret_cast<TLinearImage *>(linearImage);
+        }
+
+        EMSCRIPTEN_KEEPALIVE TTexture *Texture_decodeKtx(
+            TEngine *tEngine,
+            uint8_t *ktxData,
+            size_t length,
+            float *sphericalHarmonics,
+            uint32_t requestId,
+            VoidCallback onTextureUploadComplete)
+        {
+
+            auto engine = reinterpret_cast<filament::Engine *>(tEngine);
+
+            auto copy = new std::vector<uint8_t>(ktxData, ktxData + length);
+            image::Ktx1Bundle *bundle =
+                new image::Ktx1Bundle(static_cast<const uint8_t *>(copy->data()),
+                                      static_cast<uint32_t>(length));
+
+            filament::math::float3 harmonics[9];
+            if (sphericalHarmonics)
+            {
+                bundle->getSphericalHarmonics(harmonics);
+                memcpy(sphericalHarmonics, harmonics, 27 * sizeof(float));
+            }
+
+            std::vector<void *> *callbackData = new std::vector<void *>{
+                reinterpret_cast<void *>(onTextureUploadComplete),
+                reinterpret_cast<void *>(bundle),
+                reinterpret_cast<void *>(copy),
+                reinterpret_cast<void *>(requestId)};
+
+            auto *texture =
+                ktxreader::Ktx1Reader::createTexture(
+                    engine, *bundle, false, [](void *userdata)
+                    {
+                        std::vector<void*>* vec = (std::vector<void*>*)userdata;
+                        
+                        void *callbackPtr = vec->at(0);
+                        image::Ktx1Bundle *bundle = reinterpret_cast<image::Ktx1Bundle *>(vec->at(1));
+                        std::vector<uint8_t> *copy = reinterpret_cast<std::vector<uint8_t>*>(vec->at(2));
+                        uintptr_t requestId = (uintptr_t)vec->at(3);
+
+                        delete vec;
+                        
+                        if (callbackPtr)
+                        {
+                            auto callback = ((VoidCallback)callbackPtr);
+                            callback(requestId);
+                        } 
+                        delete bundle;
+                        delete copy; },
+                    (void *)callbackData);
+            return reinterpret_cast<TTexture *>(texture);
         }
-                
-        return reinterpret_cast<TLinearImage *>(linearImage);
-    }
 
         EMSCRIPTEN_KEEPALIVE float *Image_getBytes(TLinearImage *tLinearImage)
         {
@@ -116,191 +175,306 @@ namespace thermion
             delete linearImage;
         }
 
-        ::filament::Texture::InternalFormat convertToFilamentFormat(TTextureFormat tFormat) {
-            switch (tFormat) {
-                // 8-bits per element
-                case TEXTUREFORMAT_R8:                     return ::filament::Texture::InternalFormat::R8;
-                case TEXTUREFORMAT_R8_SNORM:               return ::filament::Texture::InternalFormat::R8_SNORM;
-                case TEXTUREFORMAT_R8UI:                   return ::filament::Texture::InternalFormat::R8UI;
-                case TEXTUREFORMAT_R8I:                    return ::filament::Texture::InternalFormat::R8I;
-                case TEXTUREFORMAT_STENCIL8:               return ::filament::Texture::InternalFormat::STENCIL8;
-                
-                // 16-bits per element
-                case TEXTUREFORMAT_R16F:                   return ::filament::Texture::InternalFormat::R16F;
-                case TEXTUREFORMAT_R16UI:                  return ::filament::Texture::InternalFormat::R16UI;
-                case TEXTUREFORMAT_R16I:                   return ::filament::Texture::InternalFormat::R16I;
-                case TEXTUREFORMAT_RG8:                    return ::filament::Texture::InternalFormat::RG8;
-                case TEXTUREFORMAT_RG8_SNORM:              return ::filament::Texture::InternalFormat::RG8_SNORM;
-                case TEXTUREFORMAT_RG8UI:                  return ::filament::Texture::InternalFormat::RG8UI;
-                case TEXTUREFORMAT_RG8I:                   return ::filament::Texture::InternalFormat::RG8I;
-                case TEXTUREFORMAT_RGB565:                 return ::filament::Texture::InternalFormat::RGB565;
-                case TEXTUREFORMAT_RGB9_E5:                return ::filament::Texture::InternalFormat::RGB9_E5;
-                case TEXTUREFORMAT_RGB5_A1:                return ::filament::Texture::InternalFormat::RGB5_A1;
-                case TEXTUREFORMAT_RGBA4:                  return ::filament::Texture::InternalFormat::RGBA4;
-                case TEXTUREFORMAT_DEPTH16:                return ::filament::Texture::InternalFormat::DEPTH16;
-                
-                // 24-bits per element
-                case TEXTUREFORMAT_RGB8:                   return ::filament::Texture::InternalFormat::RGB8;
-                case TEXTUREFORMAT_SRGB8:                  return ::filament::Texture::InternalFormat::SRGB8;
-                case TEXTUREFORMAT_RGB8_SNORM:             return ::filament::Texture::InternalFormat::RGB8_SNORM;
-                case TEXTUREFORMAT_RGB8UI:                 return ::filament::Texture::InternalFormat::RGB8UI;
-                case TEXTUREFORMAT_RGB8I:                  return ::filament::Texture::InternalFormat::RGB8I;
-                case TEXTUREFORMAT_DEPTH24:                return ::filament::Texture::InternalFormat::DEPTH24;
-                
-                // 32-bits per element
-                case TEXTUREFORMAT_R32F:                   return ::filament::Texture::InternalFormat::R32F;
-                case TEXTUREFORMAT_R32UI:                  return ::filament::Texture::InternalFormat::R32UI;
-                case TEXTUREFORMAT_R32I:                   return ::filament::Texture::InternalFormat::R32I;
-                case TEXTUREFORMAT_RG16F:                  return ::filament::Texture::InternalFormat::RG16F;
-                case TEXTUREFORMAT_RG16UI:                 return ::filament::Texture::InternalFormat::RG16UI;
-                case TEXTUREFORMAT_RG16I:                  return ::filament::Texture::InternalFormat::RG16I;
-                case TEXTUREFORMAT_R11F_G11F_B10F:         return ::filament::Texture::InternalFormat::R11F_G11F_B10F;
-                case TEXTUREFORMAT_RGBA8:                  return ::filament::Texture::InternalFormat::RGBA8;
-                case TEXTUREFORMAT_SRGB8_A8:               return ::filament::Texture::InternalFormat::SRGB8_A8;
-                case TEXTUREFORMAT_RGBA8_SNORM:            return ::filament::Texture::InternalFormat::RGBA8_SNORM;
-                case TEXTUREFORMAT_UNUSED:                 return ::filament::Texture::InternalFormat::UNUSED;
-                case TEXTUREFORMAT_RGB10_A2:               return ::filament::Texture::InternalFormat::RGB10_A2;
-                case TEXTUREFORMAT_RGBA8UI:                return ::filament::Texture::InternalFormat::RGBA8UI;
-                case TEXTUREFORMAT_RGBA8I:                 return ::filament::Texture::InternalFormat::RGBA8I;
-                case TEXTUREFORMAT_DEPTH32F:               return ::filament::Texture::InternalFormat::DEPTH32F;
-                case TEXTUREFORMAT_DEPTH24_STENCIL8:       return ::filament::Texture::InternalFormat::DEPTH24_STENCIL8;
-                case TEXTUREFORMAT_DEPTH32F_STENCIL8:      return ::filament::Texture::InternalFormat::DEPTH32F_STENCIL8;
-                
-                // 48-bits per element
-                case TEXTUREFORMAT_RGB16F:                 return ::filament::Texture::InternalFormat::RGB16F;
-                case TEXTUREFORMAT_RGB16UI:                return ::filament::Texture::InternalFormat::RGB16UI;
-                case TEXTUREFORMAT_RGB16I:                 return ::filament::Texture::InternalFormat::RGB16I;
-                
-                // 64-bits per element
-                case TEXTUREFORMAT_RG32F:                  return ::filament::Texture::InternalFormat::RG32F;
-                case TEXTUREFORMAT_RG32UI:                 return ::filament::Texture::InternalFormat::RG32UI;
-                case TEXTUREFORMAT_RG32I:                  return ::filament::Texture::InternalFormat::RG32I;
-                case TEXTUREFORMAT_RGBA16F:                return ::filament::Texture::InternalFormat::RGBA16F;
-                case TEXTUREFORMAT_RGBA16UI:               return ::filament::Texture::InternalFormat::RGBA16UI;
-                case TEXTUREFORMAT_RGBA16I:                return ::filament::Texture::InternalFormat::RGBA16I;
-                
-                // 96-bits per element
-                case TEXTUREFORMAT_RGB32F:                 return ::filament::Texture::InternalFormat::RGB32F;
-                case TEXTUREFORMAT_RGB32UI:                return ::filament::Texture::InternalFormat::RGB32UI;
-                case TEXTUREFORMAT_RGB32I:                 return ::filament::Texture::InternalFormat::RGB32I;
-                
-                // 128-bits per element
-                case TEXTUREFORMAT_RGBA32F:                return ::filament::Texture::InternalFormat::RGBA32F;
-                case TEXTUREFORMAT_RGBA32UI:               return ::filament::Texture::InternalFormat::RGBA32UI;
-                case TEXTUREFORMAT_RGBA32I:                return ::filament::Texture::InternalFormat::RGBA32I;
-                
-                // Compressed formats
-                case TEXTUREFORMAT_EAC_R11:                return ::filament::Texture::InternalFormat::EAC_R11;
-                case TEXTUREFORMAT_EAC_R11_SIGNED:         return ::filament::Texture::InternalFormat::EAC_R11_SIGNED;
-                case TEXTUREFORMAT_EAC_RG11:               return ::filament::Texture::InternalFormat::EAC_RG11;
-                case TEXTUREFORMAT_EAC_RG11_SIGNED:        return ::filament::Texture::InternalFormat::EAC_RG11_SIGNED;
-                case TEXTUREFORMAT_ETC2_RGB8:              return ::filament::Texture::InternalFormat::ETC2_RGB8;
-                case TEXTUREFORMAT_ETC2_SRGB8:             return ::filament::Texture::InternalFormat::ETC2_SRGB8;
-                case TEXTUREFORMAT_ETC2_RGB8_A1:           return ::filament::Texture::InternalFormat::ETC2_RGB8_A1;
-                case TEXTUREFORMAT_ETC2_SRGB8_A1:          return ::filament::Texture::InternalFormat::ETC2_SRGB8_A1;
-                case TEXTUREFORMAT_ETC2_EAC_RGBA8:         return ::filament::Texture::InternalFormat::ETC2_EAC_RGBA8;
-                case TEXTUREFORMAT_ETC2_EAC_SRGBA8:        return ::filament::Texture::InternalFormat::ETC2_EAC_SRGBA8;
-                
-                // DXT formats
-                case TEXTUREFORMAT_DXT1_RGB:               return ::filament::Texture::InternalFormat::DXT1_RGB;
-                case TEXTUREFORMAT_DXT1_RGBA:              return ::filament::Texture::InternalFormat::DXT1_RGBA;
-                case TEXTUREFORMAT_DXT3_RGBA:              return ::filament::Texture::InternalFormat::DXT3_RGBA;
-                case TEXTUREFORMAT_DXT5_RGBA:              return ::filament::Texture::InternalFormat::DXT5_RGBA;
-                case TEXTUREFORMAT_DXT1_SRGB:              return ::filament::Texture::InternalFormat::DXT1_SRGB;
-                case TEXTUREFORMAT_DXT1_SRGBA:             return ::filament::Texture::InternalFormat::DXT1_SRGBA;
-                case TEXTUREFORMAT_DXT3_SRGBA:             return ::filament::Texture::InternalFormat::DXT3_SRGBA;
-                case TEXTUREFORMAT_DXT5_SRGBA:             return ::filament::Texture::InternalFormat::DXT5_SRGBA;
-                
-                // ASTC formats
-                case TEXTUREFORMAT_RGBA_ASTC_4x4:          return ::filament::Texture::InternalFormat::RGBA_ASTC_4x4;
-                case TEXTUREFORMAT_RGBA_ASTC_5x4:          return ::filament::Texture::InternalFormat::RGBA_ASTC_5x4;
-                case TEXTUREFORMAT_RGBA_ASTC_5x5:          return ::filament::Texture::InternalFormat::RGBA_ASTC_5x5;
-                case TEXTUREFORMAT_RGBA_ASTC_6x5:          return ::filament::Texture::InternalFormat::RGBA_ASTC_6x5;
-                case TEXTUREFORMAT_RGBA_ASTC_6x6:          return ::filament::Texture::InternalFormat::RGBA_ASTC_6x6;
-                case TEXTUREFORMAT_RGBA_ASTC_8x5:          return ::filament::Texture::InternalFormat::RGBA_ASTC_8x5;
-                case TEXTUREFORMAT_RGBA_ASTC_8x6:          return ::filament::Texture::InternalFormat::RGBA_ASTC_8x6;
-                case TEXTUREFORMAT_RGBA_ASTC_8x8:          return ::filament::Texture::InternalFormat::RGBA_ASTC_8x8;
-                case TEXTUREFORMAT_RGBA_ASTC_10x5:         return ::filament::Texture::InternalFormat::RGBA_ASTC_10x5;
-                case TEXTUREFORMAT_RGBA_ASTC_10x6:         return ::filament::Texture::InternalFormat::RGBA_ASTC_10x6;
-                case TEXTUREFORMAT_RGBA_ASTC_10x8:         return ::filament::Texture::InternalFormat::RGBA_ASTC_10x8;
-                case TEXTUREFORMAT_RGBA_ASTC_10x10:        return ::filament::Texture::InternalFormat::RGBA_ASTC_10x10;
-                case TEXTUREFORMAT_RGBA_ASTC_12x10:        return ::filament::Texture::InternalFormat::RGBA_ASTC_12x10;
-                case TEXTUREFORMAT_RGBA_ASTC_12x12:        return ::filament::Texture::InternalFormat::RGBA_ASTC_12x12;
-                case TEXTUREFORMAT_SRGB8_ALPHA8_ASTC_4x4:  return ::filament::Texture::InternalFormat::SRGB8_ALPHA8_ASTC_4x4;
-                case TEXTUREFORMAT_SRGB8_ALPHA8_ASTC_5x4:  return ::filament::Texture::InternalFormat::SRGB8_ALPHA8_ASTC_5x4;
-                case TEXTUREFORMAT_SRGB8_ALPHA8_ASTC_5x5:  return ::filament::Texture::InternalFormat::SRGB8_ALPHA8_ASTC_5x5;
-                case TEXTUREFORMAT_SRGB8_ALPHA8_ASTC_6x5:  return ::filament::Texture::InternalFormat::SRGB8_ALPHA8_ASTC_6x5;
-                case TEXTUREFORMAT_SRGB8_ALPHA8_ASTC_6x6:  return ::filament::Texture::InternalFormat::SRGB8_ALPHA8_ASTC_6x6;
-                case TEXTUREFORMAT_SRGB8_ALPHA8_ASTC_8x5:  return ::filament::Texture::InternalFormat::SRGB8_ALPHA8_ASTC_8x5;
-                case TEXTUREFORMAT_SRGB8_ALPHA8_ASTC_8x6:  return ::filament::Texture::InternalFormat::SRGB8_ALPHA8_ASTC_8x6;
-                case TEXTUREFORMAT_SRGB8_ALPHA8_ASTC_8x8:  return ::filament::Texture::InternalFormat::SRGB8_ALPHA8_ASTC_8x8;
-                case TEXTUREFORMAT_SRGB8_ALPHA8_ASTC_10x5: return ::filament::Texture::InternalFormat::SRGB8_ALPHA8_ASTC_10x5;
-                case TEXTUREFORMAT_SRGB8_ALPHA8_ASTC_10x6: return ::filament::Texture::InternalFormat::SRGB8_ALPHA8_ASTC_10x6;
-                case TEXTUREFORMAT_SRGB8_ALPHA8_ASTC_10x8: return ::filament::Texture::InternalFormat::SRGB8_ALPHA8_ASTC_10x8;
-                case TEXTUREFORMAT_SRGB8_ALPHA8_ASTC_10x10:return ::filament::Texture::InternalFormat::SRGB8_ALPHA8_ASTC_10x10;
-                case TEXTUREFORMAT_SRGB8_ALPHA8_ASTC_12x10:return ::filament::Texture::InternalFormat::SRGB8_ALPHA8_ASTC_12x10;
-                case TEXTUREFORMAT_SRGB8_ALPHA8_ASTC_12x12:return ::filament::Texture::InternalFormat::SRGB8_ALPHA8_ASTC_12x12;
-                
-                // RGTC formats
-                case TEXTUREFORMAT_RED_RGTC1:              return ::filament::Texture::InternalFormat::RED_RGTC1;
-                case TEXTUREFORMAT_SIGNED_RED_RGTC1:       return ::filament::Texture::InternalFormat::SIGNED_RED_RGTC1;
-                case TEXTUREFORMAT_RED_GREEN_RGTC2:        return ::filament::Texture::InternalFormat::RED_GREEN_RGTC2;
-                case TEXTUREFORMAT_SIGNED_RED_GREEN_RGTC2: return ::filament::Texture::InternalFormat::SIGNED_RED_GREEN_RGTC2;
-                
-                // BPTC formats
-                case TEXTUREFORMAT_RGB_BPTC_SIGNED_FLOAT:  return ::filament::Texture::InternalFormat::RGB_BPTC_SIGNED_FLOAT;
-                case TEXTUREFORMAT_RGB_BPTC_UNSIGNED_FLOAT:return ::filament::Texture::InternalFormat::RGB_BPTC_UNSIGNED_FLOAT;
-                case TEXTUREFORMAT_RGBA_BPTC_UNORM:        return ::filament::Texture::InternalFormat::RGBA_BPTC_UNORM;
-                case TEXTUREFORMAT_SRGB_ALPHA_BPTC_UNORM:  return ::filament::Texture::InternalFormat::SRGB_ALPHA_BPTC_UNORM;
-                
-                default:
-                    // Fallback to a common format if an unknown format is provided
-                    return ::filament::Texture::InternalFormat::RGBA8;
+        ::filament::Texture::InternalFormat convertToFilamentFormat(TTextureFormat tFormat)
+        {
+            switch (tFormat)
+            {
+            // 8-bits per element
+            case TEXTUREFORMAT_R8:
+                return ::filament::Texture::InternalFormat::R8;
+            case TEXTUREFORMAT_R8_SNORM:
+                return ::filament::Texture::InternalFormat::R8_SNORM;
+            case TEXTUREFORMAT_R8UI:
+                return ::filament::Texture::InternalFormat::R8UI;
+            case TEXTUREFORMAT_R8I:
+                return ::filament::Texture::InternalFormat::R8I;
+            case TEXTUREFORMAT_STENCIL8:
+                return ::filament::Texture::InternalFormat::STENCIL8;
+
+            // 16-bits per element
+            case TEXTUREFORMAT_R16F:
+                return ::filament::Texture::InternalFormat::R16F;
+            case TEXTUREFORMAT_R16UI:
+                return ::filament::Texture::InternalFormat::R16UI;
+            case TEXTUREFORMAT_R16I:
+                return ::filament::Texture::InternalFormat::R16I;
+            case TEXTUREFORMAT_RG8:
+                return ::filament::Texture::InternalFormat::RG8;
+            case TEXTUREFORMAT_RG8_SNORM:
+                return ::filament::Texture::InternalFormat::RG8_SNORM;
+            case TEXTUREFORMAT_RG8UI:
+                return ::filament::Texture::InternalFormat::RG8UI;
+            case TEXTUREFORMAT_RG8I:
+                return ::filament::Texture::InternalFormat::RG8I;
+            case TEXTUREFORMAT_RGB565:
+                return ::filament::Texture::InternalFormat::RGB565;
+            case TEXTUREFORMAT_RGB9_E5:
+                return ::filament::Texture::InternalFormat::RGB9_E5;
+            case TEXTUREFORMAT_RGB5_A1:
+                return ::filament::Texture::InternalFormat::RGB5_A1;
+            case TEXTUREFORMAT_RGBA4:
+                return ::filament::Texture::InternalFormat::RGBA4;
+            case TEXTUREFORMAT_DEPTH16:
+                return ::filament::Texture::InternalFormat::DEPTH16;
+
+            // 24-bits per element
+            case TEXTUREFORMAT_RGB8:
+                return ::filament::Texture::InternalFormat::RGB8;
+            case TEXTUREFORMAT_SRGB8:
+                return ::filament::Texture::InternalFormat::SRGB8;
+            case TEXTUREFORMAT_RGB8_SNORM:
+                return ::filament::Texture::InternalFormat::RGB8_SNORM;
+            case TEXTUREFORMAT_RGB8UI:
+                return ::filament::Texture::InternalFormat::RGB8UI;
+            case TEXTUREFORMAT_RGB8I:
+                return ::filament::Texture::InternalFormat::RGB8I;
+            case TEXTUREFORMAT_DEPTH24:
+                return ::filament::Texture::InternalFormat::DEPTH24;
+
+            // 32-bits per element
+            case TEXTUREFORMAT_R32F:
+                return ::filament::Texture::InternalFormat::R32F;
+            case TEXTUREFORMAT_R32UI:
+                return ::filament::Texture::InternalFormat::R32UI;
+            case TEXTUREFORMAT_R32I:
+                return ::filament::Texture::InternalFormat::R32I;
+            case TEXTUREFORMAT_RG16F:
+                return ::filament::Texture::InternalFormat::RG16F;
+            case TEXTUREFORMAT_RG16UI:
+                return ::filament::Texture::InternalFormat::RG16UI;
+            case TEXTUREFORMAT_RG16I:
+                return ::filament::Texture::InternalFormat::RG16I;
+            case TEXTUREFORMAT_R11F_G11F_B10F:
+                return ::filament::Texture::InternalFormat::R11F_G11F_B10F;
+            case TEXTUREFORMAT_RGBA8:
+                return ::filament::Texture::InternalFormat::RGBA8;
+            case TEXTUREFORMAT_SRGB8_A8:
+                return ::filament::Texture::InternalFormat::SRGB8_A8;
+            case TEXTUREFORMAT_RGBA8_SNORM:
+                return ::filament::Texture::InternalFormat::RGBA8_SNORM;
+            case TEXTUREFORMAT_UNUSED:
+                return ::filament::Texture::InternalFormat::UNUSED;
+            case TEXTUREFORMAT_RGB10_A2:
+                return ::filament::Texture::InternalFormat::RGB10_A2;
+            case TEXTUREFORMAT_RGBA8UI:
+                return ::filament::Texture::InternalFormat::RGBA8UI;
+            case TEXTUREFORMAT_RGBA8I:
+                return ::filament::Texture::InternalFormat::RGBA8I;
+            case TEXTUREFORMAT_DEPTH32F:
+                return ::filament::Texture::InternalFormat::DEPTH32F;
+            case TEXTUREFORMAT_DEPTH24_STENCIL8:
+                return ::filament::Texture::InternalFormat::DEPTH24_STENCIL8;
+            case TEXTUREFORMAT_DEPTH32F_STENCIL8:
+                return ::filament::Texture::InternalFormat::DEPTH32F_STENCIL8;
+
+            // 48-bits per element
+            case TEXTUREFORMAT_RGB16F:
+                return ::filament::Texture::InternalFormat::RGB16F;
+            case TEXTUREFORMAT_RGB16UI:
+                return ::filament::Texture::InternalFormat::RGB16UI;
+            case TEXTUREFORMAT_RGB16I:
+                return ::filament::Texture::InternalFormat::RGB16I;
+
+            // 64-bits per element
+            case TEXTUREFORMAT_RG32F:
+                return ::filament::Texture::InternalFormat::RG32F;
+            case TEXTUREFORMAT_RG32UI:
+                return ::filament::Texture::InternalFormat::RG32UI;
+            case TEXTUREFORMAT_RG32I:
+                return ::filament::Texture::InternalFormat::RG32I;
+            case TEXTUREFORMAT_RGBA16F:
+                return ::filament::Texture::InternalFormat::RGBA16F;
+            case TEXTUREFORMAT_RGBA16UI:
+                return ::filament::Texture::InternalFormat::RGBA16UI;
+            case TEXTUREFORMAT_RGBA16I:
+                return ::filament::Texture::InternalFormat::RGBA16I;
+
+            // 96-bits per element
+            case TEXTUREFORMAT_RGB32F:
+                return ::filament::Texture::InternalFormat::RGB32F;
+            case TEXTUREFORMAT_RGB32UI:
+                return ::filament::Texture::InternalFormat::RGB32UI;
+            case TEXTUREFORMAT_RGB32I:
+                return ::filament::Texture::InternalFormat::RGB32I;
+
+            // 128-bits per element
+            case TEXTUREFORMAT_RGBA32F:
+                return ::filament::Texture::InternalFormat::RGBA32F;
+            case TEXTUREFORMAT_RGBA32UI:
+                return ::filament::Texture::InternalFormat::RGBA32UI;
+            case TEXTUREFORMAT_RGBA32I:
+                return ::filament::Texture::InternalFormat::RGBA32I;
+
+            // Compressed formats
+            case TEXTUREFORMAT_EAC_R11:
+                return ::filament::Texture::InternalFormat::EAC_R11;
+            case TEXTUREFORMAT_EAC_R11_SIGNED:
+                return ::filament::Texture::InternalFormat::EAC_R11_SIGNED;
+            case TEXTUREFORMAT_EAC_RG11:
+                return ::filament::Texture::InternalFormat::EAC_RG11;
+            case TEXTUREFORMAT_EAC_RG11_SIGNED:
+                return ::filament::Texture::InternalFormat::EAC_RG11_SIGNED;
+            case TEXTUREFORMAT_ETC2_RGB8:
+                return ::filament::Texture::InternalFormat::ETC2_RGB8;
+            case TEXTUREFORMAT_ETC2_SRGB8:
+                return ::filament::Texture::InternalFormat::ETC2_SRGB8;
+            case TEXTUREFORMAT_ETC2_RGB8_A1:
+                return ::filament::Texture::InternalFormat::ETC2_RGB8_A1;
+            case TEXTUREFORMAT_ETC2_SRGB8_A1:
+                return ::filament::Texture::InternalFormat::ETC2_SRGB8_A1;
+            case TEXTUREFORMAT_ETC2_EAC_RGBA8:
+                return ::filament::Texture::InternalFormat::ETC2_EAC_RGBA8;
+            case TEXTUREFORMAT_ETC2_EAC_SRGBA8:
+                return ::filament::Texture::InternalFormat::ETC2_EAC_SRGBA8;
+
+            // DXT formats
+            case TEXTUREFORMAT_DXT1_RGB:
+                return ::filament::Texture::InternalFormat::DXT1_RGB;
+            case TEXTUREFORMAT_DXT1_RGBA:
+                return ::filament::Texture::InternalFormat::DXT1_RGBA;
+            case TEXTUREFORMAT_DXT3_RGBA:
+                return ::filament::Texture::InternalFormat::DXT3_RGBA;
+            case TEXTUREFORMAT_DXT5_RGBA:
+                return ::filament::Texture::InternalFormat::DXT5_RGBA;
+            case TEXTUREFORMAT_DXT1_SRGB:
+                return ::filament::Texture::InternalFormat::DXT1_SRGB;
+            case TEXTUREFORMAT_DXT1_SRGBA:
+                return ::filament::Texture::InternalFormat::DXT1_SRGBA;
+            case TEXTUREFORMAT_DXT3_SRGBA:
+                return ::filament::Texture::InternalFormat::DXT3_SRGBA;
+            case TEXTUREFORMAT_DXT5_SRGBA:
+                return ::filament::Texture::InternalFormat::DXT5_SRGBA;
+
+            // ASTC formats
+            case TEXTUREFORMAT_RGBA_ASTC_4x4:
+                return ::filament::Texture::InternalFormat::RGBA_ASTC_4x4;
+            case TEXTUREFORMAT_RGBA_ASTC_5x4:
+                return ::filament::Texture::InternalFormat::RGBA_ASTC_5x4;
+            case TEXTUREFORMAT_RGBA_ASTC_5x5:
+                return ::filament::Texture::InternalFormat::RGBA_ASTC_5x5;
+            case TEXTUREFORMAT_RGBA_ASTC_6x5:
+                return ::filament::Texture::InternalFormat::RGBA_ASTC_6x5;
+            case TEXTUREFORMAT_RGBA_ASTC_6x6:
+                return ::filament::Texture::InternalFormat::RGBA_ASTC_6x6;
+            case TEXTUREFORMAT_RGBA_ASTC_8x5:
+                return ::filament::Texture::InternalFormat::RGBA_ASTC_8x5;
+            case TEXTUREFORMAT_RGBA_ASTC_8x6:
+                return ::filament::Texture::InternalFormat::RGBA_ASTC_8x6;
+            case TEXTUREFORMAT_RGBA_ASTC_8x8:
+                return ::filament::Texture::InternalFormat::RGBA_ASTC_8x8;
+            case TEXTUREFORMAT_RGBA_ASTC_10x5:
+                return ::filament::Texture::InternalFormat::RGBA_ASTC_10x5;
+            case TEXTUREFORMAT_RGBA_ASTC_10x6:
+                return ::filament::Texture::InternalFormat::RGBA_ASTC_10x6;
+            case TEXTUREFORMAT_RGBA_ASTC_10x8:
+                return ::filament::Texture::InternalFormat::RGBA_ASTC_10x8;
+            case TEXTUREFORMAT_RGBA_ASTC_10x10:
+                return ::filament::Texture::InternalFormat::RGBA_ASTC_10x10;
+            case TEXTUREFORMAT_RGBA_ASTC_12x10:
+                return ::filament::Texture::InternalFormat::RGBA_ASTC_12x10;
+            case TEXTUREFORMAT_RGBA_ASTC_12x12:
+                return ::filament::Texture::InternalFormat::RGBA_ASTC_12x12;
+            case TEXTUREFORMAT_SRGB8_ALPHA8_ASTC_4x4:
+                return ::filament::Texture::InternalFormat::SRGB8_ALPHA8_ASTC_4x4;
+            case TEXTUREFORMAT_SRGB8_ALPHA8_ASTC_5x4:
+                return ::filament::Texture::InternalFormat::SRGB8_ALPHA8_ASTC_5x4;
+            case TEXTUREFORMAT_SRGB8_ALPHA8_ASTC_5x5:
+                return ::filament::Texture::InternalFormat::SRGB8_ALPHA8_ASTC_5x5;
+            case TEXTUREFORMAT_SRGB8_ALPHA8_ASTC_6x5:
+                return ::filament::Texture::InternalFormat::SRGB8_ALPHA8_ASTC_6x5;
+            case TEXTUREFORMAT_SRGB8_ALPHA8_ASTC_6x6:
+                return ::filament::Texture::InternalFormat::SRGB8_ALPHA8_ASTC_6x6;
+            case TEXTUREFORMAT_SRGB8_ALPHA8_ASTC_8x5:
+                return ::filament::Texture::InternalFormat::SRGB8_ALPHA8_ASTC_8x5;
+            case TEXTUREFORMAT_SRGB8_ALPHA8_ASTC_8x6:
+                return ::filament::Texture::InternalFormat::SRGB8_ALPHA8_ASTC_8x6;
+            case TEXTUREFORMAT_SRGB8_ALPHA8_ASTC_8x8:
+                return ::filament::Texture::InternalFormat::SRGB8_ALPHA8_ASTC_8x8;
+            case TEXTUREFORMAT_SRGB8_ALPHA8_ASTC_10x5:
+                return ::filament::Texture::InternalFormat::SRGB8_ALPHA8_ASTC_10x5;
+            case TEXTUREFORMAT_SRGB8_ALPHA8_ASTC_10x6:
+                return ::filament::Texture::InternalFormat::SRGB8_ALPHA8_ASTC_10x6;
+            case TEXTUREFORMAT_SRGB8_ALPHA8_ASTC_10x8:
+                return ::filament::Texture::InternalFormat::SRGB8_ALPHA8_ASTC_10x8;
+            case TEXTUREFORMAT_SRGB8_ALPHA8_ASTC_10x10:
+                return ::filament::Texture::InternalFormat::SRGB8_ALPHA8_ASTC_10x10;
+            case TEXTUREFORMAT_SRGB8_ALPHA8_ASTC_12x10:
+                return ::filament::Texture::InternalFormat::SRGB8_ALPHA8_ASTC_12x10;
+            case TEXTUREFORMAT_SRGB8_ALPHA8_ASTC_12x12:
+                return ::filament::Texture::InternalFormat::SRGB8_ALPHA8_ASTC_12x12;
+
+            // RGTC formats
+            case TEXTUREFORMAT_RED_RGTC1:
+                return ::filament::Texture::InternalFormat::RED_RGTC1;
+            case TEXTUREFORMAT_SIGNED_RED_RGTC1:
+                return ::filament::Texture::InternalFormat::SIGNED_RED_RGTC1;
+            case TEXTUREFORMAT_RED_GREEN_RGTC2:
+                return ::filament::Texture::InternalFormat::RED_GREEN_RGTC2;
+            case TEXTUREFORMAT_SIGNED_RED_GREEN_RGTC2:
+                return ::filament::Texture::InternalFormat::SIGNED_RED_GREEN_RGTC2;
+
+            // BPTC formats
+            case TEXTUREFORMAT_RGB_BPTC_SIGNED_FLOAT:
+                return ::filament::Texture::InternalFormat::RGB_BPTC_SIGNED_FLOAT;
+            case TEXTUREFORMAT_RGB_BPTC_UNSIGNED_FLOAT:
+                return ::filament::Texture::InternalFormat::RGB_BPTC_UNSIGNED_FLOAT;
+            case TEXTUREFORMAT_RGBA_BPTC_UNORM:
+                return ::filament::Texture::InternalFormat::RGBA_BPTC_UNORM;
+            case TEXTUREFORMAT_SRGB_ALPHA_BPTC_UNORM:
+                return ::filament::Texture::InternalFormat::SRGB_ALPHA_BPTC_UNORM;
+
+            default:
+                // Fallback to a common format if an unknown format is provided
+                return ::filament::Texture::InternalFormat::RGBA8;
             }
         }
 
         EMSCRIPTEN_KEEPALIVE TTexture *Texture_build(
-            TEngine *tEngine, 
-            uint32_t width, 
-            uint32_t height, 
-            uint32_t depth, 
-            uint8_t levels, 
+            TEngine *tEngine,
+            uint32_t width,
+            uint32_t height,
+            uint32_t depth,
+            uint8_t levels,
             uint16_t tUsage,
             intptr_t import,
-            TTextureSamplerType tSamplerType, 
-            TTextureFormat tFormat
-        )
+            TTextureSamplerType tSamplerType,
+            TTextureFormat tFormat)
         {
             TRACE("Creating texture %dx%d (depth %d), sampler type %d, format %d tUsage %d, %d levels", width, height, depth, static_cast<int>(tSamplerType), static_cast<int>(tFormat), tUsage, levels);
             auto *engine = reinterpret_cast<::filament::Engine *>(tEngine);
             auto format = convertToFilamentFormat(tFormat);
             auto samplerType = static_cast<::filament::Texture::Sampler>(static_cast<int>(tSamplerType));
             auto usage = static_cast<TextureUsage>(tUsage);
-            
+
             auto builder = ::filament::Texture::Builder()
-                .width(width)
-                .height(height)
-                .depth(depth)
-                .levels(levels)
-                .sampler(samplerType)
-                .format(format) 
-                .usage(usage);
-            if(import) {
+                               .width(width)
+                               .height(height)
+                               .depth(depth)
+                               .levels(levels)
+                               .sampler(samplerType)
+                               .format(format)
+                               .usage(usage);
+            if (import)
+            {
                 TRACE("Importing texture with handle : %d", import);
                 builder.import(import);
             }
             auto *texture = builder
-                .build(*engine);
-            if(texture) {
+                                .build(*engine);
+            if (texture)
+            {
                 TRACE("Texture successfully created with %d levels", texture->getLevels());
-            } else { 
+            }
+            else
+            {
                 Log("Error: failed to created texture");
             }
-            
+
             return reinterpret_cast<TTexture *>(texture);
         }
 
-        EMSCRIPTEN_KEEPALIVE size_t Texture_getLevels(TTexture *tTexture) {
+        EMSCRIPTEN_KEEPALIVE size_t Texture_getLevels(TTexture *tTexture)
+        {
             auto texture = reinterpret_cast<filament::Texture *>(tTexture);
             return texture->getLevels();
         }
@@ -365,14 +539,14 @@ namespace thermion
 
             switch (bufferFormat)
             {
-                case PixelBufferDescriptor::PixelDataFormat::RGB:
-                case PixelBufferDescriptor::PixelDataFormat::RGBA:
-                case PixelBufferDescriptor::PixelDataFormat::RGB_INTEGER:
-                case PixelBufferDescriptor::PixelDataFormat::RGBA_INTEGER:
-                    break;
-                default:
-                    Log("Unsupported buffer format type : %d", bufferFormat);
-                    return false;
+            case PixelBufferDescriptor::PixelDataFormat::RGB:
+            case PixelBufferDescriptor::PixelDataFormat::RGBA:
+            case PixelBufferDescriptor::PixelDataFormat::RGB_INTEGER:
+            case PixelBufferDescriptor::PixelDataFormat::RGBA_INTEGER:
+                break;
+            default:
+                Log("Unsupported buffer format type : %d", bufferFormat);
+                return false;
             }
 
             // the texture upload is async, so we need to copy the buffer
@@ -380,7 +554,7 @@ namespace thermion
             std::copy(data, data + size, buffer->begin());
 
             filament::Texture::PixelBufferDescriptor::Callback freeCallback = [](void *buf, size_t,
-                void *data)
+                                                                                 void *data)
             {
                 delete reinterpret_cast<std::vector<uint8_t> *>(data);
             };
@@ -396,7 +570,7 @@ namespace thermion
                 0, // stride
                 freeCallback,
                 buffer);
-    
+
             texture->setImage(*engine, level, std::move(pbd));
             return true;
         }
@@ -457,9 +631,8 @@ namespace thermion
             std::copy(data, data + size, buffer->begin());
 
             filament::Texture::PixelBufferDescriptor::Callback freeCallback = [](void *buf, size_t,
-                                                                       void *data)
+                                                                                 void *data)
             {
-
                 delete reinterpret_cast<std::vector<uint8_t> *>(data);
             };
 
@@ -489,22 +662,26 @@ namespace thermion
             return true;
         }
 
-        EMSCRIPTEN_KEEPALIVE uint32_t Texture_getWidth(TTexture *tTexture, uint32_t level) {
-                auto *texture = reinterpret_cast<filament::Texture *>(tTexture);
-                return texture->getWidth();
+        EMSCRIPTEN_KEEPALIVE uint32_t Texture_getWidth(TTexture *tTexture, uint32_t level)
+        {
+            auto *texture = reinterpret_cast<filament::Texture *>(tTexture);
+            return texture->getWidth();
         }
-        
-        EMSCRIPTEN_KEEPALIVE uint32_t Texture_getHeight(TTexture *tTexture, uint32_t level) {
+
+        EMSCRIPTEN_KEEPALIVE uint32_t Texture_getHeight(TTexture *tTexture, uint32_t level)
+        {
             auto *texture = reinterpret_cast<filament::Texture *>(tTexture);
             return texture->getHeight();
         }
 
-        EMSCRIPTEN_KEEPALIVE uint32_t Texture_getDepth(TTexture *tTexture, uint32_t level) {
+        EMSCRIPTEN_KEEPALIVE uint32_t Texture_getDepth(TTexture *tTexture, uint32_t level)
+        {
             auto *texture = reinterpret_cast<filament::Texture *>(tTexture);
             return texture->getDepth();
         }
 
-        EMSCRIPTEN_KEEPALIVE void Texture_generateMipMaps(TTexture *tTexture, TEngine *tEngine) {
+        EMSCRIPTEN_KEEPALIVE void Texture_generateMipMaps(TTexture *tTexture, TEngine *tEngine)
+        {
             auto *texture = reinterpret_cast<filament::Texture *>(tTexture);
             auto *engine = reinterpret_cast<filament::Engine *>(tEngine);
             texture->generateMipmaps(*engine);
@@ -545,15 +722,19 @@ namespace thermion
             TSamplerCompareFunc compareFunc)
         {
 
-            if(compareMode == COMPARE_MODE_NONE) {
+            if (compareMode == COMPARE_MODE_NONE)
+            {
                 TRACE("COMPARE MODE NONE");
-            } else if(compareMode == COMPARE_MODE_COMPARE_TO_TEXTURE) { 
+            }
+            else if (compareMode == COMPARE_MODE_COMPARE_TO_TEXTURE)
+            {
                 TRACE("COMPARE MODE COMPARE TO TEXTURE");
-            } else { 
+            }
+            else
+            {
                 TRACE("UNKNWON COMPARE MODE");
             }
 
-
             filament::TextureSampler::CompareMode mode = static_cast<filament::TextureSampler::CompareMode>(static_cast<int>(compareMode));
             filament::TextureSampler::CompareFunc func = static_cast<filament::TextureSampler::CompareFunc>(static_cast<int>(compareFunc));
 
diff --git a/thermion_dart/native/src/c_api/ThermionDartRenderThreadApi.cpp b/thermion_dart/native/src/c_api/ThermionDartRenderThreadApi.cpp
index 086b112d..7a9a9ffd 100644
--- a/thermion_dart/native/src/c_api/ThermionDartRenderThreadApi.cpp
+++ b/thermion_dart/native/src/c_api/ThermionDartRenderThreadApi.cpp
@@ -350,23 +350,23 @@ extern "C"
 #endif
   }
 
-  EMSCRIPTEN_KEEPALIVE void Engine_buildSkyboxRenderThread(TEngine *tEngine, uint8_t *skyboxData, size_t length, void (*onComplete)(TSkybox *), void (*onTextureUploadComplete)())
+  EMSCRIPTEN_KEEPALIVE void Engine_buildSkyboxRenderThread(TEngine *tEngine, TTexture *tTexture, void (*onComplete)(TSkybox *))
   {
     std::packaged_task<void()> lambda(
         [=]() mutable
         {
-          auto *skybox = Engine_buildSkybox(tEngine, skyboxData, length, onTextureUploadComplete);
+          auto *skybox = Engine_buildSkybox(tEngine, tTexture);
           PROXY(onComplete(skybox));
         });
     auto fut = _renderThread->add_task(lambda);
   }
 
-  EMSCRIPTEN_KEEPALIVE void Engine_buildIndirectLightRenderThread(TEngine *tEngine, uint8_t *iblData, size_t length, float intensity, void (*onComplete)(TIndirectLight *), void (*onTextureUploadComplete)())
+  EMSCRIPTEN_KEEPALIVE void Engine_buildIndirectLightRenderThread(TEngine *tEngine, TTexture *tTexture, float intensity, float *harmonics, void (*onComplete)(TIndirectLight *))
   {
     std::packaged_task<void()> lambda(
         [=]() mutable
         {
-          auto *indirectLight = Engine_buildIndirectLight(tEngine, iblData, length, intensity, onTextureUploadComplete);
+          auto *indirectLight = Engine_buildIndirectLight(tEngine, tTexture, intensity, harmonics);
           PROXY(onComplete(indirectLight));
         });
     auto fut = _renderThread->add_task(lambda);
@@ -861,6 +861,18 @@ extern "C"
     auto fut = _renderThread->add_task(lambda);
   }
 
+  EMSCRIPTEN_KEEPALIVE void Texture_decodeKtxRenderThread(
+    TEngine *tEngine, uint8_t *ktxData, size_t length, float *sphericalHarmonics, uint32_t requestId, VoidCallback onTextureUploadComplete, void (*onComplete)(TTexture *)) {
+    std::packaged_task<void()> lambda(
+        [=]() mutable
+        {
+          auto *texture = Texture_decodeKtx(tEngine, ktxData, length, sphericalHarmonics, requestId, onTextureUploadComplete);
+          PROXY(onComplete(texture));
+        });
+    auto fut = _renderThread->add_task(lambda);
+  }
+
+
   EMSCRIPTEN_KEEPALIVE void Texture_loadImageRenderThread(TEngine *tEngine, TTexture *tTexture, TLinearImage *tImage,
                                                           TPixelDataFormat bufferFormat, TPixelDataType pixelDataType,
                                                           int level,