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
When it comes to computers, everything is math. All of 3D animation is just a really complex combination of pixel positions and interactions based on this math. If even a single digit is off, or something miscalculated, it will show up in the animation as a glitch. If it is something like positional information, you could end up with weird arms or clothes inside the body or anything else.
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