Wouldn't MAT_UW and MAT_UV refer to different things (such as order of colors)? Why not try applying MAT_UW to both wings? I also wonder why you would have to apply 2 mats to one pair of wings. I really don't like MATs, and usually don't bother to install them, but simply load in the required texture in the Render > materials window. If I was using a MAT to apply wing color, I'd expect one MAT to operate across both wings. So why don't you try that? If all else fails... you can load the texture via the material window. carolly