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

V-Ray V-Ray for Houdini Issues
1

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?
instanced_volume_memory_high.rar (2.42 MB)

2

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

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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
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3

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

4

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