No more sharpness?

[victorwol]

There is no more sharpness control on the liquids tab? It would be cool if these parameters that get replaced or eliminated were documented somewhere so the beta testers can know how to keep using this software with the changes... how can we get the FLIP solver to not look like is boling liquid all the time. Iremember that the sharpness or a smooth command or something like that used to make it more stable. It still looks pretty complicated to control.

Thanks

[Ivaylo Katev]

the the surface tension control, the sharpness parameter was related to the grid based core controlling the condensation speed, that has not physical meaning in the flip core. in the early versions the control was connected to some internal parameters, but actually they are related to the surface tension and now they are connected to the proper parameter.

[victorwol]

So higher tension values will lead to less boiling look?

[Ivaylo Katev]

as i said in the another thread, the best way to remove boiling is to increase the spf. but the higher tension leads to less droplets and smoother surface.

[flipbook]

I have been doing a lot of tests in the last few days regarding FLIP boiling on small scenes and yes higher SPF and various levels of surface tension works very well to eliminate the boiling. Just about finding the balance on a per scene basis.

[flipbook]

Just done a quick glass fill up from scratch (took the glass from the example file) using the FLIP solver... still got a few mesh issues on the lower part of the glass but can probably get that fixed.

https://www.dropbox.com/s/we5c2gdlcz...drink.mov?dl=0

Low res but SPF around 6 and surface tension was about 0.5 or so. Nice smooth result.

[Ivaylo Katev]

right now we are working to improve the liquid-geometry surface, that apparently is not perfect and this is visible in your video. but the liquid looks too jelly here, not know why, you have no viscosity enabled right?
i think there are still some points to polish on the dynamics, the main is less free flying particles even with zero surface tension.

[flipbook]

Correct there is no viscosity. Shall try re-balance to get a little more movement in the fluid.

[Fragster]

Hey guys,

speaking of the surface, I have a similar issue which, I think, fits best in here.
Simulation is pretty simple. Syrup, which is poured over ice cream scoops (or whatever).
Liquid behavior is fine but I'm still dealing with a grainy surface. The size ratio is correct and the grid resolution as well as SPF should be high enough (see attached screenshot).
So I tested different values in the Mesh smooth option. Unfortunately, this means a trade between smoother surface and detail loss.
Question is, is there a way to create the liquid smooth from the outset?


I work with Version 2.25.01 Nightly / Build ID: 1606106816.
Phoenix settings slog: https://www.dropbox.com/s/afhgmq3j0m...6-17.slog?dl=0

[georgi.zhekov]

Hello,

You can try and check "Use Liquid particles" - it's just under the smoothing - this is particle based smoothing of the mesh.

Using the particle size you can make the liquid thicker or thinner. Works only with particle based smoothing. Technically this is the distance from the mesh to the particle centers.

[Fragster]

Hey thanks, that helped.
However I now receive a warning: "You are using Liquid Particles for Mesh Smoothing, but there are no Liquid particles exported to the cache file. This may cause flickering during animation. You can export Liquid particles from the Output panel."
Since almost all options are checked in the Output group, I am not sure how to export the Liquid Particles.

[georgi.zhekov]

From what I see you have them exported, you just need to tick the boxes and you have already done that. Do you have the particles exported for all of the frames you're trying to render?

[Fragster]

Yes, the boxes where checked from the beginning. So it should all be included for the whole sequence.
That's why I'm wondering why I get the warning. I will render it overnight and check for flickering tomorrow...

[Ivaylo Katev]

you can disable the mesh preview, then we will see the particles in the viewport, but from the general info i see that the particles are present, this may be a false warning

[Fragster]

Works like a charm. No flickering on the liquid. So it seems to be false alarm.
Will post the result when the render is done.