3D Layers
Layers allow for a non-linear workflow. Artists are able to work with a model at many different stages of development simultaneously. Artists can add details such as a reptile's skin scales then turn those details off and refine the major forms underlying them. If a director is calling for more damage on a piece of armor simply dial up the intensity of that layer. If you want to see that same mesh with out any damage at all just turn that layer off.