I've recently come upon a problem with SP that my textures export out as blank. Allegorithmic forums tell me it has to do with the AMD drivers are not current. Updated them and it still happens. I post here in hopes that if it's happened to someone else, they may know something to help me out. Below are two export texture tests. The last three are the Unity 5(Metallic) configuration and the rest are the Documents Channels(no alpha) configuration, just to show what's happening.