Forums Technical Discussion HELP Pyro Advection produces stepping velocity artifacts

HELP Pyro Advection produces stepping velocity artifacts

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nickmedukha
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Joined: Sept. 2020
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Hey guys,

All weekend spent on this so I thought I need help from more experienced users

Simple setup.
SOP Pyro with some negative velocity makes a shockwave-style smoke volume.
Grid of points.
Feed grid to popnet, add advect by volumes.
Now as the pyro expands - there are these weird square looking borders EXACTLY where at the moment velocity volume ends.

Maybe there is a way to feather the velocity volume, or blur it, so it is not that abrupt?

Pics attached.

Thanks a lot,
Nick
Edited by nickmedukha - Jan. 24, 2022 00:06:09

Attachments:
Screenshot 2022-01-24 065435.png (1.6 MB)
Screenshot 2022-01-24 065601.png (1.3 MB)
Particle Wave Blend.hiplc (1.6 MB)

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vicvvsh
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Joined: April 2016
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Hi, you can use Volume Velocity SOP to filter velocity volume, and as mask density volume. It seams velocity is not 0 near the borders.

Attachments:
Particle Wave Blend_01.hipnc (1.6 MB)

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nickmedukha
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Joined: Sept. 2020
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Thank you SO MUCH!!
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