Thanks, gonna look into those.
But generally speaking I'm wondering if it's even possible to get a good/clean mask (which includes dof effect/blurry edges) for PP. Let's say I want to color correct a single object in an image, and that image has dof effect rendered/baked in. I found when I select that item with dof'ed masks and then color correct it some weird stuff happens with the edges. I read that cryptomatte is much better at handling dof/motion blur when it comes to mask, but Corona doesn't support it yet. And so I started thinking maybe I'm trying to achieve something that is not even possible without cryptomattes, but then another question arises- how did people do this before cryptomatte exist. Or how do people get nice clean masks in Corona which doesn't support cryptomatte?