Merge pull request #2857 from noalak/master

Export alpha from PBR materials

Exporters/3ds Max/BabylonExport.Entities/BabylonPBRMetallicRoughnessMaterial.cs

@@ -5,6 +5,14 @@ namespace BabylonExport.Entities
     [DataContract]
     public class BabylonPBRMetallicRoughnessMaterial : BabylonMaterial
     {
+        public enum TransparencyMode
+        {
+            OPAQUE = 0,
+            ALPHATEST = 1,
+            ALPHABLEND = 2,
+            ALPHATESTANDBLEND = 3
+        }
+
         [DataMember]
         public string customType { get; private set; }
 
@@ -51,7 +59,7 @@ namespace BabylonExport.Entities
         public float occlusionStrength { get; set; }
 
         [DataMember]
-        public BabylonTexture occlusionTexture { get; set; }
+        public BabylonTexture occlusionTexture { get; set; } // ignored
 
         [DataMember]
         public float alphaCutOff { get; set; }
@@ -60,7 +68,7 @@ namespace BabylonExport.Entities
         public int transparencyMode { get; set; }
 
         [DataMember]
-        public bool doubleSided { get; set; }
+        public bool doubleSided { get; set; } // ignored
 
         public BabylonPBRMetallicRoughnessMaterial() : base()
         {
@@ -70,7 +78,7 @@ namespace BabylonExport.Entities
             emissiveColor = new[] { 0f, 0f, 0f };
             occlusionStrength = 1.0f;
             alphaCutOff = 0.4f;
-            transparencyMode = 0;
+            transparencyMode = (int)TransparencyMode.OPAQUE;
         }
     }
 }

Exporters/3ds Max/Max2Babylon/Exporter/BabylonExporter.GLTFExporter.AbstractMesh.cs

@@ -31,9 +31,6 @@ namespace Max2Babylon
 
             // Transform
             gltfNode.translation = babylonAbstractMesh.position;
-            // TODO - Choose between this method and the extra root node
-            // Switch from left to right handed coordinate system
-            //gltfNode.translation[0] *= -1;
             if (babylonAbstractMesh.rotationQuaternion != null)
             {
                 gltfNode.rotation = babylonAbstractMesh.rotationQuaternion;

Exporters/3ds Max/Max2Babylon/Exporter/BabylonExporter.GLTFExporter.Camera.cs

@@ -5,7 +5,6 @@ namespace Max2Babylon
 {
     partial class BabylonExporter
     {
-        // TODO - Test if ok with a gltf viewer working with custom camera (babylon loader/sandbox doesn't load them)
         private GLTFCamera ExportCamera(BabylonCamera babylonCamera, GLTF gltf, GLTFNode gltfParentNode)
         {
             RaiseMessage("GLTFExporter.Camera | Export camera named: " + babylonCamera.name, 1);
@@ -37,8 +36,6 @@ namespace Max2Babylon
 
             // Transform
             gltfNode.translation = babylonCamera.position;
-            // Switch from left to right handed coordinate system
-            //gltfNode.translation[0] *= -1;
             if (babylonCamera.rotationQuaternion != null)
             {
                 gltfNode.rotation = babylonCamera.rotationQuaternion;
@@ -85,8 +82,8 @@ namespace Max2Babylon
             {
                 case (BabylonCamera.CameraMode.ORTHOGRAPHIC_CAMERA):
                     var gltfCameraOrthographic = new GLTFCameraOrthographic();
-                    gltfCameraOrthographic.xmag = 1; // TODO - How to retreive value from babylon? xmag:The floating-point horizontal magnification of the view
-                    gltfCameraOrthographic.ymag = 1; // TODO - How to retreive value from babylon? ymag:The floating-point vertical magnification of the view
+                    gltfCameraOrthographic.xmag = 1; // Do not bother about it - still mandatory
+                    gltfCameraOrthographic.ymag = 1; // Do not bother about it - still mandatory
                     gltfCameraOrthographic.zfar = babylonCamera.maxZ;
                     gltfCameraOrthographic.znear = babylonCamera.minZ;
 
@@ -95,8 +92,8 @@ namespace Max2Babylon
                     break;
                 case (BabylonCamera.CameraMode.PERSPECTIVE_CAMERA):
                     var gltfCameraPerspective = new GLTFCameraPerspective();
-                    gltfCameraPerspective.aspectRatio = null; // 0.8f; // TODO - How to retreive value from babylon? The aspect ratio in babylon is computed based on the engine rather than set on a camera (aspectRatio = _gl.drawingBufferWidth / _gl.drawingBufferHeight)
-                    gltfCameraPerspective.yfov = babylonCamera.fov; // WARNING - Babylon camera fov mode is assumed to be vertical (FOVMODE_VERTICAL_FIXED)
+                    gltfCameraPerspective.aspectRatio = null; // Do not bother about it - use default glTF value
+                    gltfCameraPerspective.yfov = babylonCamera.fov; // Babylon camera fov mode is assumed to be vertical (FOVMODE_VERTICAL_FIXED)
                     gltfCameraPerspective.zfar = babylonCamera.maxZ;
                     gltfCameraPerspective.znear = babylonCamera.minZ;
 

Exporters/3ds Max/Max2Babylon/Exporter/BabylonExporter.GLTFExporter.Light.cs

@@ -36,8 +36,6 @@ namespace Max2Babylon
 
             // Transform
             gltfNode.translation = babylonLight.position;
-            // Switch from left to right handed coordinate system
-            //gltfNode.translation[0] *= -1;
             // No rotation defined for babylon light. Use identity instead.
             gltfNode.rotation = new float[4] { 0, 0, 0, 1 };
             // No scaling defined for babylon light. Use identity instead.

Exporters/3ds Max/Max2Babylon/Exporter/BabylonExporter.GLTFExporter.Material.cs

@@ -353,12 +353,14 @@ namespace Max2Babylon
                 // --- Global ---
 
                 // Base color
+                // TODO - Unclear if alpha must be retreived from 'alpha' property of BABYLON.Material
+                // or from alpha channel of 'baseColor' of BABYLON.PBRMetallicRoughnessMaterial
                 gltfPbrMetallicRoughness.baseColorFactor = new float[4]
                 {
                     babylonPBRMetallicRoughnessMaterial.baseColor[0],
                     babylonPBRMetallicRoughnessMaterial.baseColor[1],
                     babylonPBRMetallicRoughnessMaterial.baseColor[2],
-                    1.0f // TODO - alpha
+                    babylonPBRMetallicRoughnessMaterial.alpha
                 };
                 gltfPbrMetallicRoughness.baseColorTexture = ExportTexture(babylonPBRMetallicRoughnessMaterial.baseTexture, gltf);
 
@@ -375,33 +377,44 @@ namespace Max2Babylon
 
         private void getAlphaMode(BabylonStandardMaterial babylonMaterial, out string alphaMode, out float? alphaCutoff)
         {
-            if ((babylonMaterial.diffuseTexture != null && babylonMaterial.diffuseTexture.hasAlpha) ||
+            if (babylonMaterial.alpha != 1.0f ||
+                (babylonMaterial.diffuseTexture != null && babylonMaterial.diffuseTexture.hasAlpha) ||
                  babylonMaterial.opacityTexture != null)
             {
-                // TODO - Babylon standard material is assumed to useAlphaFromDiffuseTexture. If not, the alpha mode is a mask.
+                // Babylon standard material is assumed to useAlphaFromDiffuseTexture. If not, the alpha mode is a mask.
                 alphaMode = GLTFMaterial.AlphaMode.BLEND.ToString();
             }
             else
             {
-                // glTF alpha mode default value is "OPAQUE"
-                alphaMode = null; // GLTFMaterial.AlphaMode.OPAQUE.ToString();
+                alphaMode = null;  // glTF alpha mode default value is "OPAQUE"
             }
             alphaCutoff = null;
         }
 
         private void getAlphaMode(BabylonPBRMetallicRoughnessMaterial babylonMaterial, out string alphaMode, out float? alphaCutoff)
         {
-            if (babylonMaterial.baseTexture != null && babylonMaterial.baseTexture.hasAlpha)
-            {
-                // TODO - Babylon standard material is assumed to useAlphaFromDiffuseTexture. If not, the alpha mode is a mask.
-                alphaMode = GLTFMaterial.AlphaMode.BLEND.ToString();
-            }
-            else
+            alphaMode = null;
+            alphaCutoff = null;
+            switch (babylonMaterial.transparencyMode)
             {
-                // glTF alpha mode default value is "OPAQUE"
-                alphaMode = null; // GLTFMaterial.AlphaMode.OPAQUE.ToString();
+                case (int)BabylonPBRMetallicRoughnessMaterial.TransparencyMode.OPAQUE:
+                    alphaMode = null; // glTF alpha mode default value is "OPAQUE"
+                    break;
+                case (int)BabylonPBRMetallicRoughnessMaterial.TransparencyMode.ALPHABLEND:
+                    alphaMode = GLTFMaterial.AlphaMode.BLEND.ToString();
+                    break;
+                case (int)BabylonPBRMetallicRoughnessMaterial.TransparencyMode.ALPHATEST:
+                    alphaCutoff = babylonMaterial.alphaCutOff;
+                    alphaMode = GLTFMaterial.AlphaMode.MASK.ToString();
+                    break;
+                case (int)BabylonPBRMetallicRoughnessMaterial.TransparencyMode.ALPHATESTANDBLEND:
+                    RaiseWarning("GLTFExporter.Material | Alpha test and blend mode is not supported in glTF. Alpha blend is used instead.", 3);
+                    alphaMode = GLTFMaterial.AlphaMode.BLEND.ToString();
+                    break;
+                default:
+                    RaiseWarning("GLTFExporter.Material | Unsupported transparency mode: " + babylonMaterial.transparencyMode, 3);
+                    break;
             }
-            alphaCutoff = null;
         }
 
         BabylonColor3 dielectricSpecular = new BabylonColor3(0.04f, 0.04f, 0.04f);

Exporters/3ds Max/Max2Babylon/Exporter/BabylonExporter.GLTFExporter.cs

@@ -17,7 +17,7 @@ namespace Max2Babylon
 
         private List<BabylonNode> babylonNodes;
 
-        public void ExportGltf(BabylonScene babylonScene, string outputFile, bool generateBinary, bool exportGltfImagesAsBinary)
+        public void ExportGltf(BabylonScene babylonScene, string outputFile, bool generateBinary)
         {
             RaiseMessage("GLTFExporter | Export outputFile=" + outputFile + " generateBinary=" + generateBinary);
             RaiseMessage("GLTFExporter | Exportation started", Color.Blue);
@@ -73,10 +73,8 @@ namespace Max2Babylon
                 ReportProgressChanged((int)progression);
                 CheckCancelled();
             });
-
-            // TODO - Choose between this method and the reverse of X axis
+            
             // Switch from left to right handed coordinate system
-            RaiseMessage("GLTFExporter | Exporting root node");
             var tmpNodesList = new List<int>(scene.NodesList);
             var rootNode = new BabylonMesh
             {
@@ -85,7 +83,7 @@ namespace Max2Babylon
                 scaling = new float[] { 1, 1, -1 },
                 idGroupInstance = -1
             };
-            scene.NodesList.Clear();
+            scene.NodesList.Clear(); // Only root node is listed in node list
             GLTFNode gltfRootNode = ExportAbstractMesh(rootNode, gltf, null);
             gltfRootNode.ChildrenList.AddRange(tmpNodesList);
 
@@ -97,11 +95,6 @@ namespace Max2Babylon
                 CheckCancelled();
             };
             RaiseMessage(string.Format("GLTFExporter | Nb materials exported: {0}", gltf.MaterialsList.Count), Color.Gray, 1);
-            
-            if (exportGltfImagesAsBinary)
-            {
-                SwitchImagesFromUriToBinary(gltf);
-            }
 
             // Cast lists to arrays
             gltf.Prepare();
@@ -145,27 +138,17 @@ namespace Max2Babylon
                 {
                     gltfBuffer.uri = null;
                 }
-                // Switch images to binary if not already done
-                // TODO - make it optional
-                if (!exportGltfImagesAsBinary)
+                // Switch images to binary
+                var imageBufferViews = SwitchImagesFromUriToBinary(gltf);
+                imageBufferViews.ForEach(imageBufferView =>
                 {
-                    var imageBufferViews = SwitchImagesFromUriToBinary(gltf);
-                    imageBufferViews.ForEach(imageBufferView =>
-                    {
-                        imageBufferView.Buffer.bytesList.AddRange(imageBufferView.bytesList);
-                    });
-                }
+                    imageBufferView.Buffer.bytesList.AddRange(imageBufferView.bytesList);
+                });
                 gltf.Prepare();
                 // Serialize gltf data to JSON string then convert it to bytes
                 byte[] chunkDataJson = Encoding.ASCII.GetBytes(gltfToJson(gltf));
                 // JSON chunk must be padded with trailing Space chars (0x20) to satisfy alignment requirements 
-                var nbSpaceToAdd = chunkDataJson.Length % 4 == 0 ? 0 : (4 - chunkDataJson.Length % 4);
-                var chunkDataJsonList = new List<byte>(chunkDataJson);
-                for (int i = 0; i < nbSpaceToAdd; i++)
-                {
-                    chunkDataJsonList.Add(0x20);
-                }
-                chunkDataJson = chunkDataJsonList.ToArray();
+                chunkDataJson = padChunk(chunkDataJson, 4, 0x20);
                 UInt32 chunkLengthJson = (UInt32)chunkDataJson.Length;
                 length += chunkLengthJson + 8; // 8 = JSON chunk header length
                 
@@ -352,14 +335,8 @@ namespace Max2Babylon
                         image.Save(m, imageFormat);
                         byte[] imageBytes = m.ToArray();
 
-                        // JSON chunk must be padded with trailing Space chars (0x20) to satisfy alignment requirements 
-                        var nbSpaceToAdd = imageBytes.Length % 4 == 0 ? 0 : (4 - imageBytes.Length % 4);
-                        var imageBytesList = new List<byte>(imageBytes);
-                        for (int i = 0; i < nbSpaceToAdd; i++)
-                        {
-                            imageBytesList.Add(0x00);
-                        }
-                        imageBytes = imageBytesList.ToArray();
+                        // Chunk must be padded with trailing zeros (0x00) to satisfy alignment requirements
+                        imageBytes = padChunk(imageBytes, 4, 0x00);
 
                         // BufferView - Image
                         var buffer = gltf.buffer;
@@ -387,5 +364,17 @@ namespace Max2Babylon
             }
             return imageBufferViews;
         }
+
+        private byte[] padChunk(byte[] chunk, int padding, byte trailingChar)
+        {
+            var chunkModuloPadding = chunk.Length % padding;
+            var nbCharacterToAdd = chunkModuloPadding == 0 ? 0 : (padding - chunkModuloPadding);
+            var chunkList = new List<byte>(chunk);
+            for (int i = 0; i < nbCharacterToAdd; i++)
+            {
+                chunkList.Add(trailingChar);
+            }
+            return chunkList.ToArray();
+        }
     }
 }

Exporters/3ds Max/Max2Babylon/Exporter/BabylonExporter.Material.cs

@@ -214,9 +214,20 @@ namespace Max2Babylon
 
                 // --- Global ---
 
-                babylonMaterial.alpha = 1.0f - materialNode.MaxMaterial.GetXParency(0, false);
+                // Alpha
+                // ---
+                // TODO - Unclear if alpha must be stored within 'alpha' property of BABYLON.Material
+                // or within alpha channel of 'baseColor' of BABYLON.PBRMetallicRoughnessMaterial
+                // ---
+                // TODO - XParency seems computed from several parameters
+                // 'Transparency' property is one of them
+                // Which value to use?
+                var alphaFromXParency = 1.0f - materialNode.MaxMaterial.GetXParency(0, false);
+                var alphaFromPropertyContainer = 1.0f - propertyContainer.GetFloatProperty(17);
+                RaiseMessage("alphaFromXParency=" + alphaFromXParency, 2);
+                RaiseMessage("alphaFromPropertyContainer=" + alphaFromPropertyContainer, 2);
+                babylonMaterial.alpha = alphaFromXParency;
 
-                // TODO - Add alpha
                 babylonMaterial.baseColor = materialNode.MaxMaterial.GetDiffuse(0, false).ToArray();
 
                 babylonMaterial.metallic = propertyContainer.GetFloatProperty(6);
@@ -233,22 +244,17 @@ namespace Max2Babylon
                                                 ? materialNode.MaxMaterial.GetSelfIllumColor(0, false).ToArray()
                                                 : materialNode.MaxMaterial.GetDiffuse(0, false).Scale(materialNode.MaxMaterial.GetSelfIllum(0, false));
 
-                // TODO - occlusionStrength - use default? ignored?
-
-                // TODO - alphaCutOff - use default?
-
-                // TODO - transparencyMode - private or public ?
-
-                // TODO - doubleSided - use default?
-
                 // --- Textures ---
+                
+                babylonMaterial.baseTexture = ExportBaseColorAlphaTexture(materialNode, babylonScene, name);
 
-                // TODO - Add alpha
-                babylonMaterial.baseTexture = ExportPBRTexture(materialNode, 1, babylonScene);
+                if (babylonMaterial.alpha != 1.0f || (babylonMaterial.baseTexture != null && babylonMaterial.baseTexture.hasAlpha))
+                {
+                    babylonMaterial.transparencyMode = (int)BabylonPBRMetallicRoughnessMaterial.TransparencyMode.ALPHABLEND;
+                }
 
                 babylonMaterial.metallicRoughnessTexture = ExportMetallicRoughnessTexture(materialNode, babylonMaterial.metallic, babylonMaterial.roughness, babylonScene, name);
-
-                // TODO - environmentTexture - as simple as that?
+                
                 babylonMaterial.environmentTexture = ExportPBRTexture(materialNode, 3, babylonScene);
 
                 var normalMapAmount = propertyContainer.GetFloatProperty(91);
@@ -256,8 +262,16 @@ namespace Max2Babylon
                 
                 babylonMaterial.emissiveTexture = ExportPBRTexture(materialNode, 17, babylonScene);
                 
-                // TODO - occlusionTexture - ignored?
+                // Constraints
+                if (babylonMaterial.baseTexture != null)
+                {
+                    babylonMaterial.baseColor = new[] { 1.0f, 1.0f, 1.0f };
+                }
 
+                if (babylonMaterial.emissiveTexture != null)
+                {
+                    babylonMaterial.emissiveColor = new float[] { 0, 0, 0 };
+                }
 
                 babylonScene.MaterialsList.Add(babylonMaterial);
             }

Exporters/3ds Max/Max2Babylon/Exporter/BabylonExporter.Texture.cs

@@ -47,29 +47,118 @@ namespace Max2Babylon
             return null;
         }
 
-        private BabylonTexture ExportMetallicRoughnessTexture(IIGameMaterial materialNode, float metallic, float roughness, BabylonScene babylonScene, string materialName)
+        private BabylonTexture ExportBaseColorAlphaTexture(IIGameMaterial materialNode, BabylonScene babylonScene, string materialName)
         {
-            ITexmap metallicTexMap = _getTexMap(materialNode, 5);
-            ITexmap roughnessTexMap = _getTexMap(materialNode, 4);
+            ITexmap baseColorTexMap = _getTexMap(materialNode, 1);
+            ITexmap alphaTexMap = _getTexMap(materialNode, 9); // Transparency weight map
+
+            // --- Babylon texture ---
 
-            if (metallicTexMap == null && roughnessTexMap == null)
+            var baseColorTexture = _getBitmapTex(baseColorTexMap);
+            var alphaTexture = _getBitmapTex(alphaTexMap);
+
+            // Use one as a reference for UVs parameters
+            var texture = baseColorTexture != null ? baseColorTexture : alphaTexture;
+            if (texture == null)
             {
                 return null;
             }
 
-            // Use one as a reference for UVs parameters
-            var referenceTexMap = metallicTexMap != null ? metallicTexMap : roughnessTexMap;
+            var hasAlpha = alphaTexMap != null || (baseColorTexture != null && baseColorTexture.AlphaSource == 0); // Alpha source is 'Image Alpha'
+            
+            var babylonTexture = new BabylonTexture
+            {
+                name = materialName + "_baseColor" + (hasAlpha ? ".png" : ".jpg") // TODO - unsafe name, may conflict with another texture name
+            };
 
+            // Level
+            babylonTexture.level = 1.0f;
 
-            // --- Babylon texture ---
+            // Alpha
+            babylonTexture.hasAlpha = hasAlpha;
+            babylonTexture.getAlphaFromRGB = false;
 
-            if (referenceTexMap.GetParamBlock(0) == null || referenceTexMap.GetParamBlock(0).Owner == null)
+            // UVs
+            var uvGen = _exportUV(texture, babylonTexture);
+
+            // Is cube
+            _exportIsCube(texture, babylonTexture, false);
+
+
+            // --- Merge baseColor and alpha maps ---
+
+            // Load bitmaps
+            var baseColorBitmap = _loadTexture(baseColorTexMap);
+            var alphaBitmap = _loadTexture(alphaTexMap);
+
+            // Retreive dimensions
+            int width = 0;
+            int height = 0;
+            var haveSameDimensions = _getMinimalBitmapDimensions(out width, out height, baseColorBitmap, alphaBitmap);
+            if (!haveSameDimensions)
             {
-                return null;
+                RaiseWarning("Base color and transparency color maps should have same dimensions", 2);
             }
 
-            var texture = referenceTexMap.GetParamBlock(0).Owner as IBitmapTex;
+            var getAlphaFromRGB = false;
+            if (alphaTexture != null)
+            {
+                getAlphaFromRGB = (alphaTexture.AlphaSource == 2) || (alphaTexture.AlphaSource == 3); // 'RGB intensity' or 'None (Opaque)'
+            }
 
+            // Create baseColor+alpha map
+            Bitmap baseColorAlphaBitmap = new Bitmap(width, height);
+            for (int x = 0; x < width; x++)
+            {
+                for (int y = 0; y < height; y++)
+                {
+                    var baseColor = baseColorBitmap != null ? baseColorBitmap.GetPixel(x, y) : Color.FromArgb(255, 255, 255);
+
+                    Color baseColorAlpha;
+                    if (babylonTexture.hasAlpha)
+                    {
+                        if (alphaBitmap != null)
+                        {
+                            // Retreive alpha from alpha texture
+                            var alphaColor = alphaBitmap.GetPixel(x, y);
+                            var alpha = getAlphaFromRGB ? alphaColor.R : alphaColor.A;
+                            baseColorAlpha = Color.FromArgb(alpha, baseColor);
+                        }
+                        else
+                        {
+                            // Use all channels from base color
+                            baseColorAlpha = baseColor;
+                        }
+                    }
+                    else
+                    {
+                        // Only use RGB channels from base color
+                        baseColorAlpha = Color.FromArgb(baseColor.R, baseColor.G, baseColor.B);
+                    }
+                    baseColorAlphaBitmap.SetPixel(x, y, baseColorAlpha);
+                }
+            }
+
+            // Write bitmap
+            var absolutePath = Path.Combine(babylonScene.OutputPath, babylonTexture.name);
+            RaiseMessage($"Texture | write image '{babylonTexture.name}'", 2);
+            baseColorAlphaBitmap.Save(absolutePath);
+
+            return babylonTexture;
+        }
+
+        private BabylonTexture ExportMetallicRoughnessTexture(IIGameMaterial materialNode, float metallic, float roughness, BabylonScene babylonScene, string materialName)
+        {
+            ITexmap metallicTexMap = _getTexMap(materialNode, 5);
+            ITexmap roughnessTexMap = _getTexMap(materialNode, 4);
+
+            // --- Babylon texture ---
+            
+            var metallicTexture = _getBitmapTex(metallicTexMap);
+            var roughnessTexture = _getBitmapTex(roughnessTexMap);
+
+            // Use one as a reference for UVs parameters
+            var texture = metallicTexture != null ? metallicTexture : roughnessTexture;
             if (texture == null)
             {
                 return null;
@@ -170,12 +259,12 @@ namespace Max2Babylon
             if (forceAlpha)
             {
                 babylonTexture.hasAlpha = true;
-                babylonTexture.getAlphaFromRGB = (texture.AlphaSource == 2) || (texture.AlphaSource == 3);
+                babylonTexture.getAlphaFromRGB = (texture.AlphaSource == 2) || (texture.AlphaSource == 3); // 'RGB intensity' or 'None (Opaque)'
             }
             else
             {
-                babylonTexture.hasAlpha = (texture.AlphaSource != 3);
-                babylonTexture.getAlphaFromRGB = (texture.AlphaSource == 2);
+                babylonTexture.hasAlpha = (texture.AlphaSource != 3); // Not 'None (Opaque)'
+                babylonTexture.getAlphaFromRGB = (texture.AlphaSource == 2); // 'RGB intensity'
             }
 
             // UVs
@@ -408,6 +497,16 @@ namespace Max2Babylon
         // --------- Utils ---------
         // -------------------------
 
+        private IBitmapTex _getBitmapTex(ITexmap texMap)
+        {
+            if (texMap == null || texMap.GetParamBlock(0) == null || texMap.GetParamBlock(0).Owner == null)
+            {
+                return null;
+            }
+
+            return texMap.GetParamBlock(0).Owner as IBitmapTex;
+        }
+
         private ITexmap _getTexMap(IIGameMaterial materialNode, int index)
         {
             ITexmap texMap = null;

Exporters/3ds Max/Max2Babylon/Exporter/BabylonExporter.cs

@@ -77,7 +77,7 @@ namespace Max2Babylon
             }
         }
 
-        public async Task ExportAsync(string outputFile, bool generateManifest, bool onlySelected, bool generateBinary, bool exportGltf, bool exportGltfImagesAsBinary, Form callerForm)
+        public async Task ExportAsync(string outputFile, bool generateManifest, bool onlySelected, bool generateBinary, bool exportGltf, Form callerForm)
         {
             var gameConversionManger = Loader.Global.ConversionManager;
             gameConversionManger.CoordSystem = Autodesk.Max.IGameConversionManager.CoordSystem.D3d;
@@ -298,7 +298,7 @@ namespace Max2Babylon
             // Export glTF
             if (exportGltf)
             {
-                ExportGltf(babylonScene, outputFile, generateBinary, exportGltfImagesAsBinary);
+                ExportGltf(babylonScene, outputFile, generateBinary);
             }
 
             watch.Stop();

Exporters/3ds Max/Max2Babylon/Forms/ExporterForm.Designer.cs

@@ -48,7 +48,6 @@
             this.butExportAndRun = new System.Windows.Forms.Button();
             this.butClose = new System.Windows.Forms.Button();
             this.chkGltf = new System.Windows.Forms.CheckBox();
-            this.chkGltfImagesAsBinary = new System.Windows.Forms.CheckBox();
             ((System.ComponentModel.ISupportInitialize)(this.pictureBox2)).BeginInit();
             this.groupBox1.SuspendLayout();
             this.SuspendLayout();
@@ -181,7 +180,6 @@
             // 
             this.groupBox1.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left) 
             | System.Windows.Forms.AnchorStyles.Right)));
-            this.groupBox1.Controls.Add(this.chkGltfImagesAsBinary);
             this.groupBox1.Controls.Add(this.chkBinary);
             this.groupBox1.Controls.Add(this.chkOnlySelected);
             this.groupBox1.Controls.Add(this.chkAutoSave);
@@ -279,18 +277,6 @@
             this.chkGltf.UseVisualStyleBackColor = true;
             this.chkGltf.CheckedChanged += new System.EventHandler(this.chkGltf_CheckedChanged);
             // 
-            // chkGltfImageAsBinary
-            // 
-            this.chkGltfImagesAsBinary.AutoSize = true;
-            this.chkGltfImagesAsBinary.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
-            this.chkGltfImagesAsBinary.Location = new System.Drawing.Point(166, 127);
-            this.chkGltfImagesAsBinary.Name = "chkGltfImagesAsBinary";
-            this.chkGltfImagesAsBinary.Size = new System.Drawing.Size(158, 17);
-            this.chkGltfImagesAsBinary.TabIndex = 18;
-            this.chkGltfImagesAsBinary.Text = "Export glTF images as binary";
-            this.chkGltfImagesAsBinary.UseVisualStyleBackColor = true;
-            this.chkGltfImagesAsBinary.CheckedChanged += new System.EventHandler(this.checkGltfImagesAsBinary_CheckedChanged);
-            // 
             // ExporterForm
             // 
             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
@@ -344,6 +330,5 @@
         private System.Windows.Forms.Button butClose;
         private System.Windows.Forms.CheckBox chkBinary;
         private System.Windows.Forms.CheckBox chkGltf;
-        private System.Windows.Forms.CheckBox chkGltfImagesAsBinary;
     }
 }

Exporters/3ds Max/Max2Babylon/Forms/ExporterForm.cs

@@ -33,7 +33,6 @@ namespace Max2Babylon
             Tools.PrepareCheckBox(chkOnlySelected, Loader.Core.RootNode, "babylonjs_onlySelected");
             Tools.PrepareCheckBox(chkBinary, Loader.Core.RootNode, "babylonjs_binary");
             Tools.PrepareCheckBox(chkGltf, Loader.Core.RootNode, "babylonjs_exportGltf");
-            Tools.PrepareCheckBox(chkGltfImagesAsBinary, Loader.Core.RootNode, "babylonjs_exportGltfImagesAsBinary");
         }
 
         private void butBrowse_Click(object sender, EventArgs e)
@@ -58,7 +57,6 @@ namespace Max2Babylon
             Tools.UpdateCheckBox(chkOnlySelected, Loader.Core.RootNode, "babylonjs_onlySelected");
             Tools.UpdateCheckBox(chkBinary, Loader.Core.RootNode, "babylonjs_binary");
             Tools.UpdateCheckBox(chkGltf, Loader.Core.RootNode, "babylonjs_exportGltf");
-            Tools.UpdateCheckBox(chkGltfImagesAsBinary, Loader.Core.RootNode, "babylonjs_exportGltfImagesAsBinary");
 
             Loader.Core.RootNode.SetLocalData(txtFilename.Text);
 
@@ -125,7 +123,7 @@ namespace Max2Babylon
                 exporter.AutoSave3dsMaxFile = chkAutoSave.Checked;
                 exporter.ExportHiddenObjects = chkHidden.Checked;
                 exporter.CopyTexturesToOutput = chkCopyTextures.Checked;
-                await exporter.ExportAsync(txtFilename.Text, chkManifest.Checked, chkOnlySelected.Checked, chkBinary.Checked, chkGltf.Checked, chkGltfImagesAsBinary.Checked, this);
+                await exporter.ExportAsync(txtFilename.Text, chkManifest.Checked, chkOnlySelected.Checked, chkBinary.Checked, chkGltf.Checked, this);
             }
             catch (OperationCanceledException)
             {
@@ -234,10 +232,5 @@ namespace Max2Babylon
         {
 
         }
-
-        private void checkGltfImagesAsBinary_CheckedChanged(object sender, EventArgs e)
-        {
-
-        }
     }
 }