I found one I loved. The dragon's running through a red and yellow dusty plain. You said Mars. I liked how it wasn't just an outline. It's almost as though you drew the whole thing and then faded out the majority of the dragon detail, except the edges, so it would complement the background. It almost looks as though your dragon is over a firey pit. There's a lot of emotion in that pic. What system did you use to give it color? I'd like to give it a try.