About exporting masks

[ishi]

I'm having trouble with the difference in tone levels between the rendered result and the mask after saving.

I know it's just a basic setting, but which settings should I review to make it display correctly?

[Aram Avetisyan]

Hi,

This is another limitation/way of things 3ds Max does stuff, in regards to OCIO workflow - it applies view transform to masks too.
Try saving out the mask without any transformation (no automatic conversion) - does it give expected results?

[ishi]

Thank you.
If I save it with no conversion, the mask will work!
The color of the base image will change, so should I save it separately?

[Aram Avetisyan]

Yes, saving separately is the safe way to go.

Of course you can change to Gamma workflow and this will not be a problem.

[ishi]

I see. I understand. Thank you!
I think I'll switch back to the gamma workflow once this project is finished.

[maru]

This was already reported. Unfortunately, we cannot fix this unless we implement our own file saving, which would be a big thing.

The workaround is to use the "data image" or "raw" option when saving the mask or saving in the exr format. See: https://forum.corona-renderer.com/index.php?topic=44480.msg232556#msg232556