These are the BIG pain in the rear end , unless you want pumas rocks in space ( think the Sean Connery movie Asteroid)
3d programs are GREAT at FBM and Perlin noise -- pumas rocks!
there are plugins for that
but rocks with craters ????
still not great but a bit better without hand carving
mostly just a few commands and over all editing and NO hand carving
so far of the many different methodsi have used this looks to be a good choice . Using a custom version of "earthlike" ( same people as GaseousGiganticus ) and a rock made in blender
mixing the height maps and re-importing the simple cylindrical map into blender