I made the mountain with World Machine and I applied a very high resolution bump map to add the fine detail. In my lighting setup, I used a simple round plane with a white-grey material applied to it as a sun reflector. I did this in order to soften the contrast between the directly lit surfaces and the other surfaces. I stole this trick from photography. :-)
To make the interaction in my 3ds Max viewport faster I converted the mountain into a Vray Proxy object.