"IMO it's not hair animation, nor hair model, that convinces. It's the fact that the ambient light in the room, plus the light on her skin, plus the light on the hair, ALL AGREE." Ah, the beauty of HDRI. Note that he only used HDRI in that short test clip though, not in the final production, which lasts about 10 min I think. For the production work, he used something like 40 spotlights in a dome to simulate outdoors lighting, and a large direct light for the sun. I do like the way the hair moves just a little when she tilts her head though, that was nice work. Very natural. The eye movement, however, is out of this world. Spot-on as far as I can tell.

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Tools :  3dsmax 2015, Daz Studio 4.6, PoserPro 2012, Blender v2.74

System: Pentium QuadCore i7, under Win 8, GeForce GTX 780 / 2GB GPU.