Disney has been a driving force for innovation in animation for over a century. While the Disney principles of animation remain timeless, the studio has always sought new processes. Its more recent 3D movies like Zootopia 2 have used advances in physically-based simulation software and tools for hyper-detailed grooming, but a lot of people are still just as impressed by an effect that's almost 90 years old.
Recently resurfacing on social media, an episode of Disneyland TV's Tricks of Our Trade series from 1957 (below) shows Walt Disney himself talking through an advance that added a revolutionary level of realism to hand-drawn 2D frame animation. While there was no computer processing involved, some people are calling it the 'OG CGI' over on Reddit.
