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Michael Powers asked ·

Cryptomatte AOVs not working in Arnold 6 with both GPU and CPU rendering?

It seems Cryptomatte AOVs are not working in Arnold 6 with both GPU and CPU rendering (MaxtoA 4.0.2.24). I see it is listed as not working with GPU renders, but there is no mention of it not working in CPU renders.

Is there a date when this feature will be re-enabled? This is a big part of our workflow.

Thnx

cryptomatte
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It works on my end with cpu. Latest updates and max version.

Probably the same issue as the other topic. Add the cryptomatte to the maps for aov shaders.

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crypto.jpg (176.4 KiB)
Michael Powers avatar image
Michael Powers answered ·

Thnx Michiel and Stephen. That was straight up user error :(

However, once I moved from 2020.0 to 2020.3 and the most recent MAXtoA, only the CPU renders build the correct cryptomatte EXRs.

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Yes I have the same experience, gpu doesn't work.


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Stephen Blair answered ·

Cryptomatte works with Arnold 6, I just tested it the other day. If there's a problem, it's either the scene set up or the specific plugin you're using.


Update: I just tried with 3ds Max 2020 and the latest MAXtoA, and cryptomatte worked.

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Michael Powers answered ·

I am using max 2020.0, because of backburner issues we were having with 2020.3. Which max are you using?

This my setup max:

And in AfterFX:


1583423803514.png (398.5 KiB)
1583424211352.png (342.5 KiB)
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I indeed use max version 2020.3

Did you add the cryptomatte shader as I did? That's not visible from your screenshots.

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I bet that is it. where did it go before MaxtoA 4.x.x


THANK YOU!

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It used to be underneath the aov section, you can see it in the documentation:

https://docs.arnoldrenderer.com/display/A5AF3DSUG/Cryptomatte

Now it has the same location, but the aov manager has a popup window.(the window in your screenshot)

So go to the render settings and the aov tab and there add the cryptomatte map to it like on my screenshot.

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