I'm waiting for an example to render at the moment but I can tell you right now that it looks absolute bobbins.  The idea will work effectively if the hair you're using has one flat texture layout.  Otherwise, you're going to have to play around masking bits out, changing parameters here and there.  Probably easier to make or adapt an existing texture map.

I'll post the pics in a while, just for the sake of reference.

Coppula eam se non posit acceptera jocularum.

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