Masking Corona Scatter

[kdt]

Hello everyone!
I would like to know how can I create a Mask for a  Corona Scatter object.
I tried to mask via material ID, Object ID (corona scatter and proxys) and via manual selection.
But nothing works.
Anybody know how to do it?

[romullus]

You have to set your masks at instanced objects level, not at CScatter object itself. For example, if you're scattering some teapot instances, select original teapot, change its object id to some value and setup your mask accordingly.

[kdt]

It works! Thank you very much Romullus!