A few target shapes can create a very expressive look such as this one of craziness. Figure 14-45 A coy aspect. The examples are only meant as a rough guide. Each person will get different results depending on the shape of their original targets and the capabilities of their software. A muscle is composed of a bundle of fibers that work in a mutual consortium to perform common duties.
Muscles never act alone.
When one muscle or set of muscles contract, other opposing muscles become active to regulate or change the behavior of the contracting ones. It this combination of movements that results in the complicated harmony of the facial muscles. Figure 14-46 illustrates the directional pull of the various muscle groups to achieve specific expressions. The muscles combine to create aspects of anger, hysteria, fear, surprise and suspicion. This tutorial is an excerpt from Mastering 3D Animation Peter Ratner is the author of 3-D Human Modeling and Animation.