Nils Hansen’s (“PietraSerena” on the ZBC) background as a classically trained sculptor is easily spotted in this sketchbook thread. In fact, he even shows several real-world examples of his work. You will also find a spectacular example of hard-surface sculpting, completed almost entirely within ZBrush and highly reminiscent of a certain steed from Disney’s “The Sorcerer’s Apprentice”. And if you can leave squeamishness aside, be sure to watch Ecliptic – a short film about a cockroach that is chock full of ZBrush elements.
See PietraSerena’s thread at ZBrushCentral