

It seems strange, because I use GIMP for every gfx I make for CS2D and always works.
Player skin after editing with GIMP:

I've created many graphics using The GIMP and Adobe Photoshop and both are really useful tools whenever you're creating graphics, so yes there's no real indifference there obviously. Just wanted to make that clear to some of you who are not experienced with such tools, start learning how to use them and you'll become skilled one day at it.