instanced volumes require too much memory and fail to render (> 128 gb)

[len_xie]

I don't understand, why karma can render this with very little memory but vray can't, I have 128 gb memory and it's still not enough, instanced volume are not instanced at all in vray?

[tsvetomira.girginova]

Dear len_xie, hello.

Please follow the general advices shared here:

1. Volume Light Cache must be OFF
2. Light Scattering Type must be set to Ray-Traced
3. Optimize Big Volumetric Grids must be OFF

I've just tested your scene with them and it rendered successfully - 63.91 GB RAM used.
Will now update the links in the initial post or replace them with direct screenshots.
Now they are missing due to some IT system changes, but I am sure that you will easily find the mentioned options in V-Ray PhxShaderSim (volumeGrid).

Please confirm after testing. Waiting for your feedback.

Best regards,
TS

[tsvetomira.girginova]

Dear len_xie, hello.

Please follow the general advices shared here:

1. Volume Light Cache must be OFF
2. Light Scattering Type must be set to Ray-Traced
3. Optimize Big Volumetric Grids must be OFF

I've just tested your scene with them and it rendered successfully - 63.91 GB RAM used.
Will now update the links in the initial post or replace them with direct screenshots.
Now they are missing due to some IT system changes, but I am sure that you will easily find the mentioned options in V-Ray PhxShaderSim (volumeGrid).

Please confirm after testing. Waiting for your feedback.

Best regards,
TS

[len_xie]

you saved me , it worked!!, thank you very much!!

[tsvetomira.girginova]

You are welcome!
We saved the universe. Happy rendering : )