Then we add more edges, always checking for triangular meshes
formed when cutting the polygon. As we refine the mesh, more
edges and vertices are added. If the base structure isn’t correct, it
will be much harder to fix after a number of vertices have been
moved and tweaked.
When cutting the marked area, keep everything as much quad as
possible. Notice that when the new edge is generated by the cut, a
triangle has appeared, but in this case it’s easily removed by weld-
ing the marked vertices.
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Chapter 6 – Human Project: Male Body
Figure 6-55
Figure 6-56