Unreal Engine 5, Shader Model 6 and AMD GPU cards

Development Getting Started & Setup
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Hi there,

I started my first project in UE5 using my old GPU card (a 2060 Super) which was giving no particular issues despite the low FPS when the project became very heavy in terms of high poly counts and the high number of artificial lights.

I recently bought a 7900XTX card so I could have work better and testing the engine properly.

Unfortunately I discovered that, at the moment, AMD GPUs are having troubles with the Shader Model 6, creating nasty artifacts using Lumen and making it impossible to work.

Going back to SM5 is patching the problem. This way though it is not possible to use nanite and (I think, not sure) it causes heavy light bleedings (even after working on the classic solutions for wall thickness etc.) due to the impossibility rely on virtual shadow maps on project settings.

Is this going to be fixed in the next versions, like the 5.3 one, or should I consider to switch to an NVIDIA gpu card?

Thank you for your time in advance

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Pretty sure this is an AMD driver issue more than a problem with UE5. It was reported before the last driver release and still not fixed by AMD.

For what it’s worth, we sold off our AMD hardware and I swore off ever buying AMD again. Their driver support is practically nonexistent in comparison to NVIDIA.

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i have the same issue, and it is something related to AMD drivers. Try downgrading to 5.0.3 it will temporarily fix the issue until AMD fixes its drivers to be compatible with 5.1 and above versions.