I was just checking. I've seen people using TGA as masters before now... (please dont take offense).Dani, any person in their rightful mind wouldn't work with PNG alone.
As I explain in the other thread - all commercial software is crap at that format (PNG8bit+A).It displays fine in GZDoom, so (unfortunately) I'm gonna have to agree on Graf with this one (despite me being a Photoshop fanboy) - PS is crap at that area!