Smooth Versus Rigid Binding

Each envelope can be either smoothly or rigidly bound to the selected bone. A smooth binding is the default. This causes all vertices within the envelope to move based on their distance from the joint, which creates a smooth, skin-like blending of skin at joints like the elbow (see Figure 7.26).

A rigid binding, on the other hand, moves all envelope vertices equally with the bone. You can specify that an envelope is rigid by enabling the Rigid option in the Modify panel. Rigid skin is good for certain joints, such as the neck and head or any armor or inflexible clothing that the character is wearing (see Figure 7.27).

Vetex Good Skin

Figure 7.26 Vertices with a smooth skin binding behave like real skin, with good flow at the joints.

Figure 7.26 Vertices with a smooth skin binding behave like real skin, with good flow at the joints.

Figure 7.27 Vertices with a rigid skin binding move together with the bone.
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