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Huang Yaofeng avatar image
Huang Yaofeng asked ·

Wierd Squares left in rendered smoke for Ai Volume Shape (Arnold 3.0.1.1)

Hi, I'm working on a test for smoke exported from Houdini as VDB to Maya, I use Ai Volume Shape for smoke, Shader --> Ai Standard Volume

If Shader's Displacement are set to 0, smoke's forme works well. Once I change the displacement, it left me some squares here, is it a bug? Otherwise, how can I add some effect like noise without Displacement?

shadersshaderdisplacementshadingnoise
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Lee Griggs avatar image
Lee Griggs answered ·

Does changing the Volume Padding have any effect?

I have had this issue using texture maps. You could also try adding a Range shader in-between the noise and the Volume shader and adjust the values to see if that helps. I also noticed it depends on the camera/light position, so maybe changing that could also help?

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Huang Yaofeng avatar image
Huang Yaofeng answered ·

I've tested your suggestions:

01.I adjust its value, this could work but it would limite noise, so I don't use it.

02.Changes the in change camera/light position doesn't work, maybe it's more of a reason for modelinig's textures, not for smoke

03.Volume Padding works very well, thanks @Lee Griggs ^_^


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