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https://student.societyforscience.org/article/science-hollywood?mode=topic&context=104

Science in Hollywood

There's so much snow in the movie Frozen that the cold white stuff might as well be the star of the animated film. It falls, flies, piles and melts. Snow sprays through the air as Anna and Kristoff cling to a reindeer-pulled sleigh, barely escaping a pack of snarling wolves. Snow dances in the air as Elsa uses her special powers to build an icy fortress on a lonely mountain. The movie even includes Olaf, a wisecracking snowman.

Knowing that snow would play such an important role, the filmmakers at Walt Disney Animation Studios wanted to be sure they got it right. So they turned to Joseph Teran. He is a mathematician at the University of California, Los Angeles. Teran uses computers to model natural phenomena. Teran has worked on many animated films for Disney, but Frozen posed a new challenge.

No animated movie before had needed snow to do so many things, he says. Snow can flow like a liquid — or stick together like a solid. For months, he and his team used mathematical equations and computer software to create some of the most realistic animated snow ever to fall on the Big Screen.

In the world of Hollywood blockbusters, the science that went into making Frozen is becoming the new normal. More and more, makers of films, television shows and even video games are enlisting the help of scientists to bring more dazzle — and accuracy — to theater, television and computer screens across the planet.