hi,
I posted this in composition forum first. I was instructed to post here?
I have set up a somewhat large domain (default cube scaled 3-6 times).
Also My camera is half submerged in water(like in those nature shows about fish, and crocodiles).
But on baking, the surface of my fluid bobs up and down for no reason like its breathing.
It gets smaller at higher resolutions and lower compressibility but since my camera is on the surface it is quite noticeable. Can some one tell me how I can avoid this?
P.S. My fluid is the same domain copied (Shift+D) but with half the height. since I want the fluid to be still in the beginning I cannot have the fluid object smaller than the domain (cause it will fall down).
P.S. I posted this first in the composition, effects forum.
I have noticed the same thing. If you incress the viscosity this can help. Also the relative “scale” ie. How big things are compared to how big they really are. Unfortunatly Fluids are hard to do and this is common in most fluid solvers i have used. One way to “work around” is have quite a lot of natural movement. ie some waves and things…
Otherwise i await others answers. nt lurks here sometimes too.
probably a bit late but still - arj: you’re right, the “breathing” comes from the fact that the algorithm is not solving for a fully incompressible fluid, but a slightly compressible one - that makes the whole thing much faster… But, as you noticed, that’s what the compressibility option is for. You can try setting it to lower values (which will result in a longer simulation time), or making the fluid height itself as small as possible. But there’s no easy way to completely get rid of it. And, like delt0r said, waves might also help to hide it.