I've been tinkering with a stone wall texturing process. Although I may redo the texture, I'm very happy with the process and end result.
I started with several boxes in 3ds Max, positioned so that they would tile horizontally and vertically:
I then sculpted these in Mudbox, then brought them back into 3ds Max and repeated them for the bake:
Using my Autobakerrr script and a little fiddling gave me this in about fifteen minutes:
Slapping a tiling rock texture behind it, and making a few fairly quick adjustments gave me a pretty nice result using diffuse, specular and normal. In engine, I will also be able to use the height map to tesselate/pixel offset if I desire.