Hey, I'm not an amazing artist, but I've used Gimp for several years and am good at making backgrounds etc. I almost certainly can't do creatures.
Not a great one but I decided to make something as a preview real quick. I'll probably replace this one tomorrow with a better one.
I have about 750 gimp brushes for every occasion so ask away XD (I can try fractals if you want as well, no guarantee but sometimes they look pretty cool)
