Netflix’s AI-assisted green screen bathes actors in eye-searing magenta

The process of compositing, or placing actors in front of a background that’s not actually there, is as old as filmmaking itself — and it’s always been a pain. Netflix has a new technique that relies on machine learning to do some of the hard work, but it requires lighting actors in a garish magenta.
For decades the simplest method of compositing was chroma keying, in which actors stand against a brightly colored background (originally blue, later green) that can easily be identified and replaced with anything from a weather map to a battle with Thanos. The foreground is said to be

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