It's a cheat method to model specific faces, but FaceGen was great for making recognisable models of celebs or real people. Now it's looking very out of date and I was wondering if any newer versions of the same method were around. I've been trying to find out myself and come up with nothing, but it seems like building models from photographs could be done much better now.
Photographs are ambiguous information sources. You can't really perfect an algorithm to extract accurate information about shape from a single photo without building what amounts to a strong AI that understands what it is looking at.
If you have stereoscopic images the parallax should allow one to algorithmically extract a very good estimate of the shape tho. But I don't know the name of any such tool.