Smoke Sim with Fire spreads in a Grid-Like manner.. HELP

Support Particles and Physics Simulations
1

Hi everyone. Im a Junior VFX artist in a Japanese Game studio Based in Tokyo
Ive been using mantaflow to simulate realistic smokes for realtime game FX.

Right now Im using a smoke simulation to create a Puff of smoke to use as a Frame anim for particle system.

once I bake the simulation, I noticed that they expanded in a Grid. Very ugly and not usable.
First I thought oh this is just a Resolution Problem. so I went ahead and increase the Res from 64 to 256.

the result was better, but I can still see the smoke expanding in a grid, just, thinner grid this time.

スクリーンショット 2021-07-20 140128
スクリーンショット 2021-07-20 140128585×578 362 KB

64 Resolution

Whats the reason behind this and how can I fix this?

2

スクリーンショット 2021-07-20 140214
here is the result in 256 res, its better, but you can still see the grid shapes

3

Have you tried enabling the “noise” option in the domain with good upsampling?

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4

Hi
thank you for the suggestion, i figured the only way to make this better is either using the noise as you suggested, or increase the resolution itself.

i wish there was a more optimal way to create more iterations in shorter times, but i guess this is the only way for now.

Thanks again!

5

Using both options together will give you more intricate results however that will also increase the computational complexity.

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6

yes sir, by the way if you could share with me your standard pipeline for creating a smoke simulation effect, to use in a game production, or whatever you know. I would be forever thankful :slight_smile:

7

If you have any vorticity try turning that off. Or if you have a turbulent noise remove that. They are pretty broken at the moment.

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