Not sure if you have a better solution in the works but would you guys consider adding a Lumen Screen Traces toggle (for GI traces specifically) to the Post Process Volume settings?
I saw in 5.1 that you added the ability for hidden meshes to affect indirect lighting, but this really doesn’t work unless you disable screen traces. It would be nice to be able to regionally disable screen traces through the post process volume so that you could disable them only in areas that are relying on light from hidden emissives.
I imagine hard booleans in the post process volume aren’t particularly desirable since they can’t smoothly transition, but I find the switch often isn’t that noticeable (or at least isn’t any worse than an LOD pop)