yeah, actions or some script like Vtools and its many clones are awesome for this and make it so you shouldn't ever have to directly mess with the output texture. I'm not sure about scripts that support PNG though, it'd be pretty easy to make/alter one if you have a tech guy with the time
My limitation is that I can write Actions but don't know the syntax of Scripts, so adding logic to a save command is a bit beyond me. I agree though, it's easy enough to distinguish on paper. Another thing I noticed is that if you open a PNG with alpha, you can modify and resave it without error; the name only changes if…