New Terragen 2 image after a long break.
More info here - http://blackheart6004.deviantart.com/art/Terragen-2-Shear-163303491
I have done some renders which are similar. I like the look this gives (Twist and Shear Shader that is). Very nice work. Some variation of the color of the rock may make this a bit better. That's the only crit I can think of.