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Translate/Transform cached Bifrost Graph Simulation

9 REPLIES 9
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Message 1 of 10
luca_melchiori
823 Views, 9 Replies

Translate/Transform cached Bifrost Graph Simulation

Hello,

Is there a way to translate a cached aereo simulation within Maya or the Bifrost Graph Editor? I know it is quite easy with polyObjects (as described in this tutorial: https://www.youtube.com/watch?v=_3-bKGZwdbQ&t=671s) but it doesn’t seem to work with aereo simulations.

I am asking, since I cached a huge simulation already, and I would like to reuse it and therefore I have to be able to move and rotate it.

 

Thank you in advance!

 

 

  • Windows 10 Build 17763
  • Maya 2019.2
  • Bifrost Version 2.0.2.0
  • TR 1950X
  • 32 GB RAM
  • RTX 2080 - 430.86 Studio Driver
9 REPLIES 9
Message 2 of 10

If you store a VDB you can import it with your render engine and move rotate scale it.

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https://linktr.ee/cg_oglu
Message 3 of 10

It would be incredible if simulations could be deformed ... does anyone know about this topic?
Message 4 of 10

Thank you for your reply!

Ok I see. I tried to export a few frame now in VDB and reimporting it with Arnold>Volume. What i dont understand is which properties/channels I have to write/insert into the "Grids" field (AttributeEditor>aiVolumeShape>VolumeAttributes>Grids). Since whatever i choose Arnold keeps rendering the Voxels instead of the Volume_Density. Are there any special settings in the Bifrost Graph file_Cache node i have to consider when exporting with VDB, since until now I used BOB?

 

Thanks in advance!

Message 5 of 10

Have you assigned the aiStandardVolume Shader and use the Bifrost preset?

 

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https://linktr.ee/cg_oglu
Message 6 of 10

Thank you for the reply!

Yes I have applied the aiStandartVolume. I attached a screenshot, so it is easier to have an overview what I am talking about.

 

Thanks in advance!

Message 7 of 10

Have you turned on use default material in the viewport?

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https://linktr.ee/cg_oglu
Message 8 of 10

It was not turned on. But even if I turn it on it doesnt change anything. I added a screenshot again. 

 

Thanks in advance!

Message 9 of 10

You need to use the bifrost preset.

There is a preset button on top of the shader tab.

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https://linktr.ee/cg_oglu
Message 10 of 10

Ok I see! Yes this solved the issue.

 

Thank you very much!

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