This is what I want to do. I want to do a glass texture with an etched/painted on logo.
I know how to do a glass material, but do I have to duplicate area for the decal and transparency it onto the glass (thus upping my quads) or can I “Layer” my materials together?
Make a glass like material. Then use gimp or photoshop to make the logo texture you need and make it have an alpha channel(Remember to save it as .png). Use UV Unwrap to place it where you need. Also make sure you set the logo texture to influence alpha values.