I' m preparing to do a simple animation with cloud.
There should be a still cloud. Then a bird fly through it and collide a hole in the cloud.
However, I got a problem.. I can't make the cloud freeze while its collision function is OK.
For example, I may freeze Fluids by using keyframes between Dynamic Grids and Static
Grids or just using cache. It makes Fluid particles frozen indeed, but it can't be collided
with objects anymore. It happened to nParticles too. When I use some ways to make
nParticle stop, its collision doesn't work at the same time.
Does anyone know how to do it? Thx a lot!