static extern int GPU_AddShaderMaterialFromFiles(IntPtr gpu, string vsprogram, string psprogram, OnNativeSCSD callback, MaterialType baseMat, int userData);
static extern int GPU_AddHighLevelShaderMaterialFromFiles(IntPtr gpu, string file, string ventrypoint, VertexShaderType vsCompileTarget, string psfile, string psEntryPoint, PixelShaderType psCompileTarget, OnNativeSCSD callback, MaterialType baseMat, int userData);
