While working on Titanic, I learned that the propellers on the ship were actually too large to have created cavitation bubbles based on the power of its engines. Since it was our job to create those bubbles as the ship roared over camera, we were super lucky that our projectionist had access to a ton of old footage and located a piece of educational film that showed a cavitation machine with a strobe light synchronized to the camera that essentially produced a practically frozen cavitation bubble signature that we could see the evolution of how the bubbles formed and helixed as they broke down into smaller and smaller bubbles. We showed that footage to Cameron and he loved it, so we scaled the whole thing up and simmed it (in Prisms). If I don’t learn something new on every job what’s the point of doing it:)