Persistent Flickering Issue in UE5 (All Versions)

Development Programming & Scripting
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1

Hey everyone,

For a while now, I’ve been struggling with a persistent flickering issue that appears in every version of Unreal Engine 5.

The mesh itself is clean with no overlapping geometry. I’m seeing this flickering and other visual artefacts even in new, clean projects. It happens regardless of whether Nanite, Lumen, or Ray Tracing are enabled, and I’ve already tested all the available anti-aliasing methods to no avail. The issue only seems to happen on objects in the distance.

So far, the only workaround I’ve found is to enable the DLSS plugin, a solution I discovered after reading through these documents:

I feel like this might be something that a simple console command or a single project setting could resolve. I was hoping someone here (or maybe even one of the Epic devs) might have an idea about:

  1. What could be causing the issue?
  2. Are there any potential fixes that don’t rely on using plugins?

Any help would be massively appreciated.

Cheers!

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Is this a modular mesh duplicated many times, or one big mesh?

A few of your captures look like Lumen Final Gather / denoising. We could disable Lumen entirely to narrow in on the issue. If it was Lumen, that’s where I’d make sure you’re using modular meshes that have good distance fields. There are several View Modes that can help debug Lumen issues.

However, most of your captures look like AA problems. You do have a lot of sharp edges close together, which will emphasize TSR problems. You might be able to minimize it by increasing the resolution or screen percentage. Nanite, TSR, Lumen, and Virtual Shadow Maps all play nicely together, so you might try having all those on at the same time.