Deep exr

[Gillou_19]

Dear,

I would like to export exr with multichannel and Deep exr at the same time. I saw that's possible with maya with a python script. How can i do that with 3dsMax ?
What i actually need is the cryptomatte without having to render everything twice.

Best,

Gilles

[hermit.crab]

Usually, you can do it with a Post-Render script, which will save the image through the VFB, while the deep file is saved through the "V-Ray raw image" output. Example script:

vfbcontrol #savemultiimage "path\\to\\file.exr"

However, I am unsure if this would be of any use since cryptomattes are not written in deep .exr files. There are ways to extract masks from deep files, though.