UE 5.2 Lighting/reflections break at certain angles/distances

[GediminasK]

Flicker

Has anyone encountered this issue?

Running on UE 5.2
Base was the VR template
GPU - RTX3080 (newest drivers)
Lumen - ON
VSM - ON
Hardware Raytrace - ON
Nanite - ON
AA - TSR

Tried disabling Raytracing all together - didn’t help
Tried changing Lumen settings in PPV (also in project settings directly)
Tried disabling AA - nope
Tried moving geometry above Z=0 - nope
Tried changing Virtual Shadow Maps to Shadow Maps - nope

Any insight would be very much appreciated.

[Astrotronic]

Hi Gediminas,

Thanks for the Video. I haven’t seen anything quite like this.

I know that the VR Template has several unique graphics settings. (Diff the Config/DefaultEngine.ini with a blank template to see a complete list)

So I think one easy troubleshooting step would be to create a new blank project, right-click on your existing map in the content browser, and migrate it to the new blank project.

This would at least show if one of the template settings might be to blame.

[GediminasK]

Thanks for the troubleshooting idea, very much appreciated! By using it I managed to pinpoint the culprit.

Long story short:

1. Created a new blank project.
2. Migrated corrupted level into new blank project.
3. Level works fine in new project. Means it’s either template settings (or my settings that I changed)
4. Start changing all settings that I usually use. (Virtual Textures, Lower Lumen Relfection Resolution and so on…)
5. Breaks on PROJECT SETTINGS → RENDERING → VR → INSTANCED STEREO
6. Untick
7. ???
8. Profit!