Facial Motion and Controls - Animating with Blender: How to Create Short Animations from Start to Finish - page 168

Figure 10.14 Setting a lower weight on the seam vertices

infl uences of all vertex groups add up to 1.0 on any particular vertex. Figures 10.15-10.16 show two overlapping
vertex groups, with the weighting each vertex would need to create a proper and smooth transition.

10.16

10.15
Figures 10.15-10.16 Smoothly blended vertex groups

This points out another strength of the technique mentioned in Chapter 5 of working with a relatively low
resolution master mesh to which subsurfacing is applied at render time. It is far easier to deal with problems like
this when there are only, say, 10 vertices to weight by hand, as opposed to working with a high resolution mesh,
which would involve hundreds or thousands of vertices.