Thanks, guys.
@Goldfarb: Rays of debris would mean making a mask, which is easy enough, at least for the near distance. But procedurally, it would mean some mathematics creating star-like (fading) rays around each crater, which could be blended by a fractal to slightly distort/fractalize. That kind of function work is out of my league, I'm afraid.
The shadows on our moon are really black I've noticed, so I killed the fill light. Although the shadows aren't as nicely lit up anymore. On the other hand, the shadows on photo's(!) are intensely black, but if you would walk around, your eyes may pick up some reflected light. So what would be more real?
@Martin: that's why we don't hear from you a lot... I indeed also found that clouds work nicely without atmo. I always like a bit of blur and vagueness here and there, so I created some 'moondust' near the horizon which is not very real I read in some scientific sites. Real moondust doesn't fly around, but statically clings to everything, especially in cold everdark areas.
