3/31/2024 0 Comments Woody buzz incinerator toy story 3![]() When it came time to fine-tune the simulation, Houdini provided Pixar’s artists with the ability to achieve rapid iterations thanks to a heavily trimmed simulation cache and procedural placement. This approach also gave them the opportunity to cull out a large percentage of unnecessary rigid bodies freeing up valuable resources. Applying a special geometry solver to the volume representation made it easy to determine which rigid body objects remained on the bottom layer of the pouring trash throughout the entire simulation. Using the volume representation, they could procedurally scatter plastic bags on top of the surface. ![]() The toys are terrified but must accept their fate. Although Woody and Buzz save Lotso from being held down by debris, he refuses to return the favor, leaving them to burn in the incinerator. However, they are caught by Lotso and end up in the dump. Unkrich knows that whole incinerator example all too well, as there was an emotional moment in Toy Story 3 where the toys held hands as they approached the possibility of a fiery death. ![]() With a simple network of geometry nodes, they turned it into an approximate volume representation. In Toy Story 3s final act, Andys toys plot and execute a daring escape from the daycare center. With Houdini, they could simulate the floating plastic bags without having to modify the already approved look of the shot by importing a cache of rigid bodies from the simulation using propriety tools. This sequence was simulated using Pixar’s proprietary tools and the bags needed to be easily integrated into the shot without re-running the simulation from scratch, which would have been too costly in terms of time and resources. This additional detail was being added to an already approved sequence of shots where a dump truck empties its haul of trash. In another scene, Pixar’s artists were assigned the task of animating plastic shopping bags that flutter through a wasteland of discarded trash.
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