Following is a transcript of the video. Narrator: If you peel back the layers of Rapunzel's hair in "Tangled," you'll see just how complicated animating 3D hair can be. But back then, Disney had ...

The island environments of "Moana" (2016) drove Disney to find new ways to simulate water, lava, sand, mud, and foam, improvements that laid the groundwork for more ocean simulation in "Frozen II ...