Created a new noisy shader to create graphical effects for my ‘Procedural Rocks’. It is based on a shader mentioned on gamedev : Journal of Ysaneya
And I got a basis implementation for this effect from : A hybrid approach for procedural planets.
But I stripped the noise functions, deleted the UV mapping (because of procedural won’t have assigned UV mapping) and created these images:
 
This could be used for craters, cracks and many other possibilities.
Sources for this sample can be downloaded here