UE5 Lumen lines/streaks artifact

I’m getting some weird artifacting on some of my models. It appears as these vertical streaks that run in sync with the 4 cardinal directions. They only ever appear if my model is in shadow. I tried so many model import settings at this point.

If I rotate the model, the streaks do not change position:

The moment I disable Lumen, the problem goes away:

This problem popped up as soon as UE5 went out of EA.

1 Like

They honestly just look like reflections to me. What happens if you set the material to max roughness?

Probably the same as this issue. I don’t think there’s a solution as of right now.

Yes, looks to be the same problem. It’s only really a problem with round objects.

For what it is worth, Daniel Wright responded with a workaround in that thread last night:

Worth seeing if that fixes it for you