Hi, I have two issues with the C masking pass:
-I save my renders as an EXR with different render elements included.
At the moment it is not possible (or I do something wrong) to make proper use of C_masking (with the option Masking by MATERIAL ID) as a render element.
When I want to make use of the "ID matte" effect on the C_masking pass in After Effects, the different Material ID's are not recognised.
-Secondly (but this is not only EXR related) just like Zdepth,within the C_Masking pass opacity maps are ignored. They will be shown completely black.
cheers
Johan