Black line in distance

Development Rendering
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1

Hello,

I am experiencing an issue in UE5 where a black line will appear in the distance of large, flat open areas.

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I can reproduce the issue in a new project with default settings, by creating a new level with the “Open World” template.

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I have searched the forums and online, and while I have seen other posts about similar issues, it always seems to relate to Lumen and/or the lighting or post process settings. I tried all the solutions I could find, and even tried disabling the lighting in my scene (see the gif above), but the line is still there.

Does anyone know what could be causing this issue?

Thanks!

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2

Try disabling distance fields and deleting every lighting-related actor in the scene, but that likely will not solve the issue. I would actually like to see a solution for this too. Perhaps the World Partioning system is hiding the section in the distance, or it could just be an issue with the default landscape mesh.

3

Thanks for the reply. I tried your suggestion but didn’t see any difference. I also tried deleting the default landscape and making a new one, and this was the result.

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It looks like there’s a circular boundary that appears at a far distance, beyond which the flat part of the landscape is just rendering as black. When I turn off the lighting it disappears, but there are still some weird line artifacts that appear when the camera moves.

I’m still learning Unreal and don’t know how the world partitioning system works yet. Is there a way to test if that’s the source of the issue?

4

Well, I would create a fresh project, add a Basic map, and delete the existing floor and fog actors. Now, create a new landscape and sculpt it randomly in the distance. If you still see artifacts, then you should submit an official bug report to Epic Games here.

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Thanks, I followed those steps and unfortunately I’m still seeing artifacts. I’ll submit a bug report.

6

Hey AtomicIsland,

I recently ran into this issue as well. Initially I was using a massive nanite mesh for the distant landscape and only ran into the black flickering geo/lighting when I switched over to world partition. I also previously used one large landscape actor as well with no black.
Turning off lumen and virtual shadow maps didn’t fix the issue either.

I’ll submit a bug report as well but thought I’d share this with you in case you’re able to update your submitted bug too.

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