Volume / VDB odd behaviour

[MrCTonks]

Hey,

Having lots of fun with Octane great work to the team developing. I've had one recurring problem however - getting strange position / scale changes in volumes when i go to render? first time i thought it was a blip but i've had it a few times now in different scenearios - embergen sims re-positioned, straight sims from houdini with no transforms etc..

Have attached image, viewport cam view vs render cam view

Some things i've tried:
- Make sure theres no funky top level transforms or render flags
- converting to / from houdinis standard volumes

and the details:

plugin version: 2020.1.3.0 (Jun 22 2020)
Octane API version: 2020.1.3
Houdini HDK version: 18.0.416

[juanjgon]

Can you please share this scene? I'm investigating several issues with the "vdb" primitive transformations, but usually, the "volume" primitives were working fine.

As a workaround, you could try to export the volumes to OpenVDB files to let Octane load them directly from file at the render time. Usually, this is the best workflow to work with volumes in Octane.

Thanks,
-Juanjo

[MrCTonks]

Ah sorry i didnt get a notofication on the reply - will try and get a simpler test scene for you

[MrCTonks]

Here we go - so same sim, one has standard export, the other has convert to vdbs ticked on

let me know if this link doesnt work

https://drive.google.com/file/d/16SDVIx ... sp=sharing