Cryptomatte and Vray for Modo?

[simonbjork]

Is Cryptomatte on the roadmap to implement for Modo? I see it was added to Vray 3.6 for Max. It's a great addition.

[vlado]

Yes, it will be added at some point.

Best regards,
Vlado

[Robert]

Its only needed because Vray can't output an alpha mask in single black white channel. Thats a pain in the ass.

[simonbjork]

Any news on this?

[vladimir.nedev]

The cryptomatte render element should be in tomorrow's nightly build ( 2018.02.09 ).

Note that it has certain limitations at this point, which I am not sure will be fixed as part of the 3.6 core.

1. It works with the bucket sampler only (progressive, RT CPU or RT GPU don't work).
2. You must save the .exr file from the "Render with V-Ray..." commands, saving from the VFB Save button won't work, since in that case the necessary cryptomatte manifest is not included in the .exr file
3. There is no AA between material mattes on the same item
4. You cannot use DWAA/DWAB (i.e. lossy) compression on the .exr file

Here is a short clip showing the whole process with compositing in Nuke : https://youtu.be/TA0d9blSDP4

Greetings,
Vladimir Nedev