It sounds to me like the MAT is pointing to the wrong path for the texture. I sugest you open the MAT file in a text editor and check the texture reference. Then edit the texture reference to point to the true location of the texture. If the texture is in the ".RuntimeTextures" folder or one of its sub-folders, then you only need the file name in the reference, not the full path. Fore example, using the reference: textureMap ":MyTexture.jpg" This would find MyTexture.jpg anywhere in or under the Textures folder.