A 3D canyon I modelled in Blender. Modelling the canyon was obviously the hardest part. I started by modelling a base mesh, I then sub-surfed it 6 times, with a displace modifier. I added the displace modifier one axis at a time, so that I could make the ground softer than the canyon walls. The lighting is quite simple, but it took a while of re-rendering for me to be happy with it. Th background is a simple gradient plane with a point light and a yellow circle. To finish it off, I added a bit of mist and composited some contrast in. Done all in three days in my free time.
It should put the picture on this post, but here’s the DeviantArt link anyway: