Here are some guidelines for adjusting a guided Bifröst simulation.
- If the simulation does not hold its shape, you can try turning off
Compute Guide from High Res Liquid in the
global guide properties.
- If the simulation seems "overactive", for example, if there are explosive bursts, then there may be an issue with air pockets developing between the liquid and guides. One way to try to address this is to reduce
Interface Distance. However, this value should always be greater than or equal to 1.5 times the
Master Voxel Size to avoid noise at the surface.
- Another way to try to eliminate air pockets is to increase
Guide Overlap and
Liquid Overlap. However, increasing these values too much can also cause problems.
- You may need to use additional influences to tone down an overly energetic simulation. For example, this may be the case especially when using a polygon mesh as a guide, if the mesh's "waves" move in a way that's very different from real waves. For example, if the guiding mesh changes shape too quickly then it may impart extreme accelerations, which in turn cause the simulation to overshoot — in this case, try damping the velocity with a
motion field.
- To improve wakes behind boats, try increasing
Min Simulation Depth in the global guide properties. Larger values allow waves with longer wavelengths to propagate.