AI gives Thanos a soul in 'Avengers: Infinity War'

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Digital Domain also used a piece of custom machine learning software called Masquerade to make the motion capture performance seem more natural. The process starts by placing 100 to 150 tracking dots on Brolin’s face, which is captured by two vertically oriented HD cameras. It’s not meant to be a high-resolution scan; instead, it’s a fairly low-quality rendering. That’s fed into a machine learning algorithm that’s using a library of high-res face scans, across a wide variety of expressions.