Exceptional!! Nevertheless two critics (matter of taste!):
-you used a "through camera"-mapping for the lighter rock texture, didn't you? Maybe you could try creating additional (projecting-) cameras and textures for each the side and the front with the appropriate orientation to make it less obvious. Just an idea.
- the fog could be a little more "smokey". I know that sometimes fog looks exactly like yours, but I'd love to see more noise.