Alpha in reflection render element ??

[nirsul]

Hi

Can I create a render element that shows the alpha map in reflections - for example - sky area reflected in windows glazings ?

Currently I can use multimatte for the glass material but want only the empty alpha areas inside the glazings.

thank for any idea

NIR

[RichardBlank]

I would like to have that to! But I dont think there's an element that supports it now.