This command declares the beginning of a new clump. All subsequent vertices and polygons are added to this clump until a matching ClumpEnd is reached.

A clump is a collection of vertices, polygons, and materials. Clumps are the basic building blocks of all objects. All .rwx files should have at least one ClumpBegin/ClumpEnd pair.

Clumps can be nested (i.e. one ClumpBegin/ClumpEnd pair can be declared inside another). When clumps are nested the object becomes hierarchical, and the inner clump is called a child clump. Since hierarchical objects can take significantly longer to render than non-hierarchical (or "flat") objects, for best performance nested clumps should only be used in RWX files intended for avatars that are to be animated.

See Also