Hmm, for the texel size entry, I would probably just have 2 drop-downs or text entry fields ... one with standard texture sizes ( 128, 256, 512, 1024, 2048, 4096 ) and the other with per-unit ratios ( 1, 2, 4, 8 ) then users can pick whichever combination they want. Or manually type-in something instead. What I did for…