I’m talking about things like [Merida’s eyes being all buggy when animating Brave](https://www.youtube.com/watch?v=4405qEhBmEM) or [everyone’s hair going in weird directions in The Incredibles](https://www.youtube.com/watch?v=Y_MQnH54XaA) or [Shrek’s arms suddenly getting really long](https://www.youtube.com/watch?v=UNngNiYXuVE). Why does the animation fail in (apparently) random and uncontrollable ways?
In: Technology
3D models aren’t animated completely by hand, and there’s usually a lot of what we call “rigging,” involved.
For example, instead of having to move each eyeball independently, you might “rig,” them to both follow a target, so when you move the target both eyeballs point at it. You might also rig an arm so that when the elbow bends the bicep flexes, and many other things.
Computers aren’t perfect though, so sometimes you accidentally set things up in a way where they conflict with each other and you get a whole bunch of really weird and often funny glitches. Other times it’s just the animators stretching Shrek’s arms just for fun and realizing it makes everyone in the office laugh 😂
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