"Avatar: The Way of Water" utilized groundbreaking wet-for-wet performance capture, filming in a 900,000-gallon tank using specialized 3D cameras and free-diving actors to achieve realistic aquatic movement. To ensure accurate motion data, the production used thousands of floating balls to diffuse light and specialized equipment for real-time capture of actors, including Kate Winslet who set a 7-minute breath-hold record. Learn more about the production's techniques at Los Angeles Times .