VDB not rendering at the correct place

[michaelmarcondes_prozis]

If I load any VDB I exported from EmberGen to Houdini and try to render, it always render it out of place.

I tried with other vdbs and the behaviour is the same.

This is the vdb sequence from the example: https://mab.to/0AnN00vVa

[juanjgon]

How are you rendering it? I'm fixing several problems with the Houdini vdb primitives transformations, but all should work fine if you load the OpenVDB file directly in Octane using the OpenVBD options available in the Octane OBJ spare parameters.

Usually, you can also fix the problems with the Houdini "vdb" primitives if you convert them to "volume" primitives using the Convert SOP, and the scene extraction time is also usually faster.

Thanks,
-Juanjo

[rohandalvi]

Hi,

You need to delete one of the fields in the vdb. Just add a delete sop and delete one of the fields. A specific field causes this issue. I don't remember which one. Just delete till the volume stops shifting in the render.

regards
Rohan

[juanjgon]

Yes, one of the problems that we can have is a volume including grids with different voxel resolution, something not supported by or plugin. This can happen for example with the velocity grids. If you don't need these grids, you can remove them to resolve the problem.

In any case I want to make volume rendering more robust to avoid these kinds of workarounds.

Thanks,
-Juanjo

[michaelmarcondes_prozis]

Thank you guys.
Indeed Rohan deleting the @flames that comes from EmberGen fixes it.
By the way, thank you for your hard work on your tutorials which helped me many times.
Cheers