I have been trying my hand at painting on both the 707 and 727.  I note that paint kits don't have alpha channels included in the textures.  Do I need to add one for a good quality paint? My understanding is that an alpha layer will control glossiness or reflections and that the separate specular texture only affects only the nature of the specular reflections.  Is that right? There are some bits of my textures that should be matt and some bare metal parts that I want to be more reflective than the painted parts.