Fix another format issue

src/Engines/thinEngine.ts

@@ -3196,7 +3196,7 @@ export class ThinEngine {
 
         var textureType = this._getWebGLTextureType(texture.type);
         var format = this._getInternalFormat(texture.format);
-        var internalFormat = babylonInternalFormat === undefined ? this._getRGBABufferInternalSizedFormat(texture.type, format) : this._getInternalFormat(babylonInternalFormat);
+        var internalFormat = babylonInternalFormat === undefined ? this._getRGBABufferInternalSizedFormat(texture.type, texture.format) : this._getInternalFormat(babylonInternalFormat);
 
         this._unpackFlipY(texture.invertY);