Hoenest on Instagram: "🎬 Fact: In Piper (2016), Pixar built an entirely new simulation system called “Sandcastle” because existing tools couldn’t animate realistic wet sand. Every grain had to react to water, pressure, and movement, which meant some shots contained millions of individually simulated sand particles. The team said the film’s famous wave sequence was one of the most complex effects they had ever created for a short film."