I'm having an issue where I'm getting reflections from my pyro volume on a matte object. I've tried using a Render Geometry Properties and a Background Plate to matte it, but both have the same effect.

Maybe it's showing through the matte. I'm not sure what it's doing honestly, but it shouldn't be there

I just need a clean black hole for compositing.

That doesn't seem right...
I'm unable to repro with my test cases. Can you please file a bug with your scene? Thanks.

dlee
That doesn't seem right...
I'm unable to repro with my test cases. Can you please file a bug with your scene? Thanks.

Thank for taking the time to look, but I figured it out.

There was a very slight, almost 1-2 voxel protrusion of my pyro sim outside of the matte surface. It was super thin and only showed up when it was over black, so it was hard to see without the matte.