Frozen (2013 movie)
Frozen is also one of the most difficult animated movies to make. The animation team had to travel to a snowy area in Wyoming so that they could study the behavior of snow and simulate that with a computer. They also used a program that could generate a lot of strands for Elsa's hair. An average human has about 100,000 strands of hair, while Elsa's hair was made of 400,000 strands.