In their book The Illusion of Life (still the Bible of animation 35 years after it was written), Disney legends Ollie Johnston and Frank Thomas set out 12 principles of animation. The first and most important of these is called “Squash and Stretch”. Basically, it boils down to this: In animation, a form can change shape, but never volume. Observing this rule gives characters weight and solidity, and allows your brain to forget that you’re just watching a flat two dimensional image. As long as the character observes the same rules as an object in the physical universe, the brain perceives it as an object in the physical universe. In essence, it becomes real.
This rule was, for a long time, a hard barrier for computer animation. Early CGI could create solid three dimensional looking objects no problem, but they were always static. Rigid. To give the illusion of a living thing, an image has to not only be able to move but to change its shape while keeping its volume consistent and trying to do that with CGI in the early days would invariably cause any computer to throw up its hands in frustration and get back to plotting the enslavement of all mankind. All that changed in 1984. Well, not the plotting enslavement thing. They’re still doing that.
So in 1984, Lucasfilm had a subdivison called The Graphics Group, a group of computer scientists who had been recruited out of NYIT by George Lucas, who had decided that computer generated imagery might be useful in creating special effects.
The Graphics Group decided to create a short to demonstrate that CGI could compete with traditional animation. And when I say “short”, I mean “short“. This thing clocks in at a whopping 86 seconds.