It amazes me again and again to see just how many parts and steps go into such visual effects work. The head isn't "simply" created by scanning or tracking Brad Pitt's face. They brought sculptors in, they had to retarget their tracking info onto the digital models, create photoreal lighting setups, and had special assignments for creating the teeth, the tongue, the skin and the eyes.
Or as Ed Ulbrich sums it up: 150 people working for a full two years.
Mr. Ulbrich and his team sure earned their Oscar trophy. And in this talk you can get an even more detailed look on why.
Download in 480p quality: