I've seen a system that was more rules based that did this based on a set of sampled head shapes and then you could fine tune the results by hand. One thing tha

I've seen a system that was more rules based that did this based on a set of sampled head shapes and then you could fine tune the results by hand. One thing that I noticed is that creating a mappable texture from a photo and mapping it onto any reasonable 3D head model was already cool. In any case, this particular attempt doesn't look better than previous techniques I have seen. Every single head in this demo had a pronounced sloping forehead which surely can't be the case for every input.