Unity 3.0 is available now! Start learning the new features on design3.com
"Occlusion Culling"
Design3.com
Occlusion culling is an optimization method by which objects not in view are not rendered. We show you how to use the integrated Umbra occlusion system to optimize your levels within Unity. You'll create occlusion areas like view volumes to inform the game of possible camera locations and limitations and target volumes to inform the game of dynamic objects like enemies.