Because of demands for rapid feedback and the limitations of present-day technology, human figures are often represented with stick figures, curves, or simple geometric primitives. This approach sacrifices realism of representation for display efficiency. Recently, a layered approach to the representation of human figures has been adopted     in which skeletons support one or more layers, typically muscle, fatty tissue, skin, and clothing layers. The additional layers serve to flesh-out the skeleton and to enhance the realism of the representation.
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