The source is about 700k of C, so there are all kinds of algorithms for folding and space optimizing, but out of the box it would not work too well. 3D artists

The source is about 700k of C, so there are all kinds of algorithms for folding and space optimizing, but out of the box it would not work too well. 3D artists have some very particular ideas of what makes for good unwrapping. In general they dont want stretching, but there are a bunch of special cases where "the right kind" of stretching is a good thing. My algorithm tries to implement all these special cases. (that are over 20 different passes that each tries to solve a specific type of geometry). For CNC its actually much simpler, since the rules of what is and isn't permissible are much simpler.