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Denni Mareta avatar image
Denni Mareta asked ·

Volume AOV not rendering

Hey guys, having an issue with atmosphere shader not rendering to AOV. I mentioned this issue in previous Arnold core, but it's still the same in new Arnold. I'm trying to create a volume path with atmosphere shader, it's visible in driver_c4d_display, but it's totally black and empty in EXR or Tif. Any ideas?

aovvolumetrics
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Peter Horvath avatar image
Peter Horvath answered ·

Right, it was changed in Arnold 5 when the closures and light path expressions came in. Actually as I see the atmosphere is in the emission AOV but can not be (easily) separated from surface emission at the moment. We'll take a look if the workflow can be improved in a future release.

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Peter Horvath avatar image
Peter Horvath answered ·

It's still a limitation. The atmosphere shader and the volume are different implementations and the atmosphere shader does not contribute to the volume AOVs. The workaround is to use a scaled Arnold Volume in box mode instead of the atmosphere shader.

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Denni Mareta avatar image
Denni Mareta answered ·

Maybe there is a way to mange the issue using the Leght Expressions?

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It's not possible to separate the atmosphere in a light path expression either currently, as far as I know.

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Peter Horvath avatar image
Peter Horvath answered ·

I still don't have an ETA, sorry.

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lamar lowder avatar image
lamar lowder answered ·

Bump. Is this being fixed anytime soon?

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Bruno Rantin avatar image
Bruno Rantin answered ·

Yes, having the Atmosphere and Surface emission in the same AOV is terrible for post-production and broke our workflow.

Please fix this!

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Denni Mareta avatar image
Denni Mareta answered ·

Yes, it's such a vital need! Looking forward for an update.

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Denni Mareta answered ·

Yes, it's such a vital need! Looking forward for an update.

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Denni Mareta avatar image
Denni Mareta answered ·

Peter, do you think is there any chance to output atmosphere to aov?

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Denni Mareta avatar image
Denni Mareta answered ·

Atmosphere was visible in volume aov in previous Arnold core. Now it's not. I'm trying to follow your advice, but the result looks completely different with box volume

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