Hello there,
I’ve got a problem with a container that I can’t figure out how to solve. I have adjusted all my settings just the way I want my fluid to behave and look, but I did that at a low base resolution of 50. I was hoping to be able to increase it later when doing the final renders but when I change it to 200, 400 the behavior gets completely different from what I want.

I don’t know if there’s a right way of working with fluids or if there’s quick “fix” for this.
I’d really appreciate any help!

Thank you

I’m not verry skilled in fluids and I’m not shure if this works, but since you like the way it was simulated in low res, why don’t you try chacing the sim at the low resulution and then increase it? I’m not shure if this will have the effect I supose you have in mind(having high detail and yet the same movement of the fluid)

As far as I can tell, the fluid container settings are incredibly sensitive to changes in voxel resolution and don’t scale up particularly well, especially if you want to maintain a specific ‘look’ whilst ‘up res-ing’ your grid. This is especially the case if you go straight from a relatively modest ‘preview’ res (50-100) to something pretty heavy (300+) and expect it to add extra detail. I guess this is pretty much a consequence of the way the Navier-Stokes solver works.

The best way i’ve found is to iteratively start will a small grid (50-100) to get the gist of the motion and general look, and gradually up the res in smaller steps and tweak the settings as you go to keep things looking roughly the same.

Hope this helps.. :-)

Cheers,

Andy Mc..

Andy McNamara
Senior 3D Animator / CG Supervisor / TD
Prime Focus London