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Lucas Tebib avatar image
Lucas Tebib asked ·

[Solved] MtoA 5.2.0 Cryptomatte issue

Hi,

I recently installed the latest version of MtoA (5.2.0) and of Cryptomatte for Nuke (1.2.2 on GitHub).

It renders the Cryptomatte perfectly and I can see them in Nuke. But in the Cryptomatte node, when I try to pick a color, it doesn't add it to the Matte list, even if I force the update.

I had a very old version of MtoA and Cryptomatte since I didn't work with it since a very long time, that's why I updated all of this.

I'm on Maya 2018 and Nuke 11 (Non-Commercial).

Thank you very much

mtoacryptomattenuke
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Lucas Tebib avatar image
Lucas Tebib answered ·

Ok I just found what I did wrong: for Cryptomattes to work, the exr files has to be separated, not merge during the render.


For the test of my current project, I did a full render in the Arnold RenderView then "Saved a Multi-Exr Image", so it didn't work.


A Batch Render solved it.

Thank you very much for your help @Slava Sych

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Just a comment about this - multi channel EXRs do work, but ones written from the Arnold Renderview do not, as they are missing necessary metadata.

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Slava Sych answered ·

Works fine for me in nuke 10.5
You turn on "Picker Add" button in Cryptomatee node before selection mattes?


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Lucas Tebib answered ·

Thank you for your answer!

Yes I do.

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Try to use older version of nuke, and can you make attach one of you exr file for test?

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