volume displacement

[Anonymous]

hi ... when i use polygon object with volumestandard shader the displacement inside the shader tab does not work ? .. so i have to use the normal displacement slot in the shadergroup for polys ? .. or is there a trick ?

thank you

[lee_griggs]

Here is an example shading network of a displaced object, rendered as a volume.

You must ensure you have enough Volume Padding to see the displacement.

You could alternatively try using the Displacement attribute on the Standard Volume shader.

[Anonymous]

can you export the displaced volume as geometry and render it in a separate program?

[lucasridley]

@LeeGriggs, I've seen Volume Padding mentioned several places but nowhere does it mention or show a screenshot of where it's actually located in Maya. I can't find it anywhere. I'm just trying to add some noise to a bifrost aero cache and I can't get it to give any result. I've punched the density way up and the noise just barely affects the volume. I really want to add noticable noise to this super smooth aero cache and I can't figure it out. In the example you gave here, what is the checker mapped into on the displacementShader1 node? Does this only work for a mesh and not bifrost aero cache? Any help would be much appreciated, thanks!

[lee_griggs]

Did you convert the bifrost to polys?

[omar_ahmed_vc]

he asked that when u plugin a displacement map to the displacement node inside AiStandardVolume, it has no effect, but instead u must connect it to Displacement volume.

so I'm also asking why it doesnt work this way

[lee_griggs]

Have you tried the example scene file here?

[omar_ahmed_vc]

sorry for late reply, the scene example works fine, but when I try to do the same technique manually it doesnt work, later on I found that the scene scale must be in cm not meters, and any scaling to the object must be freeze . so quite wierd , but it works in certain manner but not all the time.