I have a scenario where the actual v002 Blurs exhibit a side effect that sounds really similar to the “black” output that you describe with the Screen Capture in certain instances.
If I’m bringing image out of a certain patch (we can talk about this aspect via PM if needed), I actually have to run the image through a core image kernel before it will render to Billboard in a way that isn’t “black”.
So, though I don’t really want to go into specifics about the setup, I want to throw out there that if anyone has a scenario where they’re getting black output, and it seems like there should be output, it might be worth it just to throw in a CI kernel in front of the v002 blur(s) to see if it makes a difference.