FYI - I get the blue lines too (it pretty much just looks like a drawn lines grid, I see them intersecting quite often) - not sure if its the same thing. Running AMD 9700 XT. Note it was not occurring in 5.7 preview (5.6.1 was also fine) but in 5.7 release it has been doing it (only thing i did change from preview to release was turn on “generate ray tracing proxy meshes for nanite”. I pretty much get it straight away when turning on megalights, and it resolves when turning off. And you see it straight on landscape (non-nanite). Only tracing against certain meshes seems to do it (or its just more intermittent) (these meshes were ok 5.6 and 5.7 prev) - if i replace said below with a basic cone, or a different plant mesh example (haven’t tried a huge amount of different meshes) - it is all ok, enabling and disabling nanite doesn’t change anything.
No translucency, all standard default lit opaque materials.
Just standard expo height fog (enabled\disabled)
enabling and disabling high quality translucent reflections/refractions in project settings does nothing. Dark black one is (sky light and direction light with “affect world” off, the black is just the landscape below.) Green is just landscape texture for my personal debug.
For the moment i am not using Megalights in this level\setup (one pass pro is fine for the moment)
