...erm, except that... none of any of this stuff handles things like folded-over meshes at all well.  Like the hem of a garment.  On the inside of the mesh, the normals of those vertices point the wrong direction (towards the figure), and/or the ones on the bottom of the crease might point straight up in the air.

All of this code currently only really works well with single-layer meshes, with all vertex normals pointing outwards.

EDIT: that is, unless you do something like your other mapping methods, where you diddle with the normals prior to calling the correlate routine.

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