You can guide a Bifrost liquid simulation using either a polygon mesh or a cached, lower-resolution simulation. This allows you to perform a detailed, high-resolution simulation that is restricted to the top surface layer to reduce memory and computation time. These techniques are appropriate for oceans and similar situations.
- Using a planar mesh with an animated deformation provides artistic control over the basic motion, while the simulation adds high-resolution details like splashes and breaking waves.
- Using a cached, low-resolution simulation provides correct hydrodynamic motion throughout the body of liquid, while high-resolution details are computed only for the top layer.