Ben Mauro has released a free 3D environment design tutorial using ZBrush, Keyshot and Photoshop.
Zbrush: Rigid Surface Speed Sculpt
Jeremy Baldwin shows how to sculpt rigid surfaces in ZBrush using various freeform techniques.
Cezar Brandao - Sculpting Livestream
Take a look at Cezar Brandao's sculpting-centric Livestream channel.
Behind The Scenes With ILM
See the role ZBrush played in ILM's pipeline for The Avengers film.