shading noise reduction - works on alphas?


I’ve been using the shading noise reduction button for area lights.
I’ve also been using the render export buffer function.

I recently noticed the alpha wasn’t working
when using the “render buffer export” feature in image processesing.

i set it to source - shadow
destination - rendered alpha.

seems to work on shading mode. cleary not for shadow.
anyone know why?

anyone know if there is a work around?
or if this is just some screwy bug.

the goal was simply to grab the shadow for a front projection.


I think ya still have to use a plane dont ya?
You probrably are anyway or I might be wrong.


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