Time to get this guy done! As I've said in other tutorials, I try not to get my dark areas totally dark right off the bat. You can't erase this stuff, so take it slow and build it up. Here is how I started the legs, knowing this would be too light:
And then made them darker:
And put some trees way back in the background:
But that Bison's just too pale, so I went back in and darkened parts of his body. This is really tough trying to get him dark enough but also keep enough contrast to keep it interesting!
Now of course he needs some foreground, because he's sort of floating around right now, and on stubby legs, can't have that... So I scrim in some pretty faint indications of a grassy field...