NOTEBecause the Physique modifier is instanced on both the mesh and
head, it doesn't matter whether the head, the mesh, or both objects are
selected when you adjust the head envelopes. Any changes to envelopes will
take place on both objects regardless of the current selection. You select the
head at this time only because it will be easier to see how vertices are affected
when you change the envelopes.2 Access the Envelope sub-object level for the Physique modifier.
3 Click the head link to select it.
4 In the Active Blending group, turn off Deformable and turn on Rigid.
Vertices on the head turn green to indicate they are rigid.5 Adjust the outer envelope so it encompasses the head and a little of the
neck, but no more.
Adjusting Envelopes | 937