Updated test render

Here's a snapshot of some updated work on the landscape with a bit of sky composited in. I've added a custom texture to the ground for some more variance and whatnot. Messed around with lighting and decided to go with approximate ambient occlusion to save on render times. The landscape at this point is pretty much complete aside from a few little odds and ends, the next big thing to tackle is getting decent render times with the dog and hawk in the scene.