So far, on Once Upon a Time, the show seems to mainly be using Elsa, Anna, Kristoff, Hans, and Sven to see exactly how many Frozen inside jokes and references they can fit into a 40 minute episode.

Now that computers can render intricately detailed outfits, the little-known behind-the-scenes job has become crucial in animated movies like “Frozen 2.” By Robert Ito This article is part of our ...