Win11 shipping game flickering landscape

Development Programming & Scripting
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1

Hi all,

I have an issue with the flickering landscape on my shipping game, specifically on Windows 11.


I use UE 4.27.2 in my project, and it works fine on Windows 10, however, Windows 11 has this flickering issue.

Not sure when to look for the clue and how to debug it?
I’m sure it is somewhere in the Landscape material, but I cannot figure out where it can be.

I will appreciate any assistance in this, thanks.

2

Are you sure it’s not z fighting of two objects? It looks like the GPU is flickering back and forth between showing object A and B like in this YT video.

External link not affiliated with epic games:

3

That looks like a tessellation conflict, specially if the problem only occurs between Windows versions. The problem comes from how the landscape material is compiled on Win11 drivers. It looks fine on Win10 because the driver tolerates it, but on Win11, it exposes precision/LOD problems.

I would test disabling tessellation on your landscape, as well as forcing LOD 0 on the affected elements. And just in case, update your drivers to the latest version in your affected system (if possible, go for a clean install, then use Developer drivers).