User Guide > Rigging > Character Setup > Skinning > Smooth skinning > Understanding smooth skinning >
Smooth skin influence objects
With smooth skinning, you can use NURBS or polygonal objects as smooth skin influence objects to further shape and control the deformation of smooth skinned objects. Such influence objects provide deformation effects in a manner similar to the wrap deformer’s wrap influence objects. You can use the influence objects to restrict deformation (for example, undesirable shoulder deformations) as well as to create deformations (for example, bulging muscles).
For more information on using smooth skin influence objects, see Using smooth skin influence objects.