For #ToyStory 4, instead of manually creating cobwebs for their Antique Mall environment, @Pixar created AI spiders which would weave realistic cobwebs for them like a real spider.
You can see the red dots which are the AI spiders as they weave cobwebs in real-time. This allowed the team to quickly and easily add cobwebs to their environments in a realistic manner.
Any cobwebs that required interaction with characters were created manually to ensure that they behaved as the animators expected.
The AI spiders were created by Hosuk Chang, a Sets Extensions Technical Director at Pixar.