This is a Curvy 4.0 portrait using all kinds of cutting and joining to make the models from simply sketched parts.
Workflow Tutorial - See this Sculpt in Progress
More angles of the heads here
Arso & Hack - Curvy 3D 4.0
Re: Arso & Hack - Curvy 3D 4.0
Impressive art...
Re: Arso & Hack - Curvy 3D 4.0
Dramatic pose and lighting.