Matted hair is similar to traditional knots and tangles, except worse. While everyday knots can easily be detangled, mats can be difficult to remove with a brush or comb alone. Hill describes ...

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 ...