I'm planning on modelling a head using Nurbs patches based on this article:

https://coldfusion.art.msstate.edu/ca...ead/NURBS.html

What I can't understand is the author's patch diagram of HIS Setup.

He has patches that only partially share edges yet the isoparms all line up, and how does he join these patches when they don't have the same uv span.
For example: the lower jaw patch (5 isos) and the patch below the eye(4 isos).

Also, I can't figure out how he gets the lower jaw patch isoparms to all meet at the mouth instead of spanning the surface.



It looks like a good technique for head modelling.