The biggest challenge I got was to find the right visual langage for the strips. A perfect simulation mix of tension, smoothness and liquidity.
The shot with the stick that interract with the foundation was also challenging. In order to be efficient and able to add all the small details wanted by the client, I decided to do no simulation at all for that shot. Simulations can be tricky to art direct sometimes. This shot is a simple combinaison of mask and blendshapes that gawe me a better and simplier control.