Can they ever show the film where the left side of the screen is the actors in motion capture suits while the right side is the finished film? (collider.com)
[15] The actors act out the scene wearing specially designed motion capture suits. (en.wikipedia.org)
Dafoe was joined by fellow extraterrestrials Samantha Morton and Thomas Haden Church — all three wore motion capture suits and shot the live action film on - location in the desert. (backstage.com)