editor
hiraethified
One half of the face above is a photograph, and the other half is a highly detailed computer generated rendering created using a program called KeyShot by Luxion.
Fascinating article about how advanced CGI has become here: http://www.wired.com/design/2013/03/luxion-keyshot/
I haven't looked to find out which is the real half, but I think it's the one on the right but it's very close.