modeler

Noun

 * 1) a person who makes models, especially from a plastic medium such as clay
 * 2) a person who models the behaviour of a physical system, especially by using a computer model
 * 3)  a computer program that simulates a physical system
 * 4)  a computer program that generates a three-dimensional representation of an object or system

Verb

 * 1)  to model, to mould (physically change the shape of)
 * 2)  to shape (e.g. a character)