Inspired by some zbrush technics of my good friend MelaleaYing.
Have a look
Most of all, inspired from the Prometheus movie and specifically from the work of this excellent russian artist.
He's the man behind the 3d rebuilding of the alien ship.
OK, common technics in zbrush but what about blender?
Here's some tests on the following technic. Post yours, let's start a thread on this kind of sculpting.