Unfortunately your video compression is so strong that I cannot tell what I’m meant to be seeing, but I can say a few things.
- Lumen GI and reflections cannot run concurrently with Ray Traced Ambient occlusion. If one is on then the other is off, which by the looks of it is RTAO.
- RT translucency is under a soft deprecation. It’s still in the engine, but it’s broken with enough features that it really should not be used. It could cause all sorts of transparency and performance problems.
- Megalights would be a better fit for managing noise bc the RT shadow denoiser really isn’t that good.
- Unbatched lights means you have non nanite geo sucking up a lot of processing power. You should make that nanite as much as possible.
Also, Fortnite’s solution to manage noise was just to cut foliage from lumen entirely, which really is probably your best bet. Remove it from consideration, it will still receive GI and shadowing through SSAO.