Yep, Eulerian fluid simulations are pretty hard to control. I’ve also tried implementing a fluid sim for my undergraduate thesis (mainly looking at the Bridson

Yep, Eulerian fluid simulations are pretty hard to control. I’ve also tried implementing a fluid sim for my undergraduate thesis (mainly looking at the Bridson book), but you have to play around with the parameters a lot to get a smooth result. Fiddling with timestep size, handling numerical instability, etc... I think that is why games use particle-based methods a lot more, because it is less finicky and works better in extreme conditions (well, the players seem to really love doing extreme things in the game...)