Attached Link: http://www.geocities.com/paulthepuzzles/rocks.html

Method as above with a few scales/rotates etc on randomly selected objects thrown in. Standard opengl render with default lights ex wings. All started as cubes - I worked on 32 - if doing the job 'properly' I'd pick the 'best', discard the junk and carry on etc. This lot took about an hour or so - since time's been mentioned :) Oh, yes, also a couple of magnet moves on some verts to distort along a particular axis. pp