Quick Sci-Fi Landscape Sketch

Just finished this sci-fi concept painting (Photoshop + WACOM tablet). I can't really call it a speed painting because it took about 3 hours. I kind of went in there without a battle plan, starting with the rock formation on the right, then onto the grass, and added the city as an afterthought.

I was going to add a little village at the base of the river, but my computer was hanging up the entire time so I basically said "to hell with this" and wrapped it up.