volume rendering issue

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Hi mates

I've a volume rendering issue in Houdini,

I use particles convert to VDB as the source of volume light.

it pretends the heat and temperature for rendering volume shader.

but I don't know why it has the problem shows some grids on the result seens like flicker.

the video as below.



I hope someone can give me answers, I never have this problem before…. thanks so much!!
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hi
i this problem is related two things
1 - add noise to temperature or heat in your shader of pyro you can test it by multy method in your noise.
2 - your simulation and voxel size.

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IMG-20180518-WA0000.jpg (69.2 KB)

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Hi Sajadalavi

Thanks for your reply,
Actually, I didn't use pyro shader from Houdini,
I build my own custom volume shader, and also I create temperature and heat in VDB from particles,
Because I would like to control the color visually.
but it's not perfect result as I think.
this is my breakdown to show what I did.

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