I know you said "alternatives to Photoshop" but if you don't find any, this video shows that you can run Photoshop on Linux now. Try it and see if it works for you
I will! And I'm going to give a look at awk and sed, I didn't know you can do all that stuff with it. Thanks for sharing :D
Srry I'm a little ignorant. What roman idea are you talking about?