As for an ass, some demons may not have any, like some human. ^_^
I am currently working on a project, and later on I might need a few character concepts/art drawn… I will put you down on my list!
thnx for the comments guys…
Besides the comments about depth, which would mean darkening the lines in your foreground figures (your background is more defined than the foreground, which should be the opposite!) and paying more attention to the lighting (your demons and such would probably have lots more shaded areas in that sort of environment), I would worry about texture. As ebonyblackrabbit said, scales would be a nice touch, as well as more wrinkles in the skin. Everything is a bit too smooth, particularly the rocks, which actually don’t look much like rocks at all. They could use more craggy, jagged detail. If you worked on those things, the piece could possibily look a lot better.
I like the design though, and your poses are pretty nice!
I hope that helps somewhat.
and just so you guys know, I did that thing like 2 years ago… my skills have increased, changed, and evolved in many different ways since then. I can’t really go back and change the image anymore, because it was sold at an art show about a month after I made it. oh and also, it looks MUCH better in person.(I know the people that bought it, so I get to see it still) because of the lighting from the flash on the camera it made the darker, more defined lines have a bit of glare, so they appeared lighter than they actually are, while the lighter lines apear a bit darker in comparison, because there was no glare on them.
but thnx for the comments guys. much apreciated as always