The Pixar animation-system extension expanded for Toy Story 5 was Luna.
Luna is an extension of Pixar’s proprietary Presto animation system. It is a lighting tool designed to let artists adjust lighting across multiple shots together, rather than treating every shot as an isolated task.
Pixar first introduced Luna on Hoppers, using it cautiously for a small number of interior shots. For Toy Story 5, the team expanded it to exterior sequences involving complicated environments, vegetation, hair, characters and changing light. That broader use helped maintain visual consistency across connected shots.
Luna is easy to confuse with RenderMan XPU, Pixar’s rendering technology, or the new rigging system developed for Daffodil. They are separate production tools: Luna handles lighting workflows, while XPU handles rendering and the rigging system controls character movement.