For a bit of fun, I spent some time trying to work out how SubDs work in Modo, and reproduced that in Unity by writing some Perl in Modo, and a custom DAE importer in C#.

The two most useful information sources were:

Subdivision Surfaces in Character Animation (siggraph 1998):

Rory Driscoll's blog:

Loading more stuff…

Hmm…it looks like things are taking a while to load. Try again?

Loading videos…