how to blur a velocity field with volume vop

[Screenglow VFX]

Hello,

I need to blur out a velocity field (coming from pyro) in a volume vop.I want to advect the particles later on and if it is not blured,it looks bad.I have atached the scene and 2 pics showing what needs to be achieved.Any ideas? tks

scene.hiplc

[Atom]

Try plugging a GasBlur into the Velocity Update and type the letters vel for the field to blur.

[Screenglow VFX]

tks for the hint.the issue is that I want to affect only parts which are getting closer to the bounds (vel slowly decreasing in intensity).I want to do it in sops (volume vop) so I can use to advect particles.

[Atom]

You can use a GasMatchField to create a mask, on-the-fly from the density field. Then use a gasfieldwrangle to invert it.

@mask = 1-@density;

The GasBlur accepts a mask field, then you are only blurring that vel that resides outside of density.

ap_scene.hiplc

Edited January 15, 2019 by Atom

[Screenglow VFX]

thank you ! great , will test to see if I can advect more efficient the particles.