ZBrush for Digital 3-D Printing - ZBrush Creature Design: Creating Dynamic Concept Imagery for Film and Games - page 700

Methods of Rapid Prototyping
Often you will hear the term rapid prototyping used as a catchall to refer to the process of creating physical
objects, or prototypes, from 3-D digital data. The two most common kinds of technology used at this time
to generate physical objects from a 3-D model are 3-D printing (stereolithography) and 3-D milling (CNC