BlendMode
fun BlendMode( colorSourceBlend: BlendFactor = BlendFactor.ONE, alphaSourceBlend: BlendFactor = BlendFactor.ONE, colorDestinationBlend: BlendFactor = BlendFactor.ZERO, alphaDestinationBlend: BlendFactor = BlendFactor.ZERO, alphaBlendFunction: BlendEquationMode = BlendEquationMode.FUNC_ADD, colorBlendFunction: BlendEquationMode = BlendEquationMode.FUNC_ADD)