unreal engine 5.1.1 Weird artifacts with ray traced shadows enabled with AMD CARD rx 6900xt

[IITHEBOOMERII]

Hello, I recently upgraded my graphics card from a Rtx 2060 Super to an rx 6900xt, and I have been facing problems with the engine.

• All materials or static mesh thumbnails are in white.
• If I used rectangular or directional lights, fireflies would appear everywhere until I turned off the light ray-traced traced shadow
• If I open materials or static mesh, the preview appears in red and green colors with too
  much fireflies

i have the latest drivers installed.
I am using Windows 10 , and DirectX 12

The same happens if i open an old project or create a new one.
Note that I didn’t face any of these issues when I had the old card.

[Quetzalcodename]

Hey @IITHEBOOMERII!

This looks to be an ongoing issue with AMD cards and Lumen. Are you using Virtual Shadow Maps? Have you tried disabling those?

[IITHEBOOMERII]

when iam using directx 11 instead it works , i think the main issue is related to SM6 because SM5 with directx 11 works fine

[IITHEBOOMERII]

after updating to version UE 5.2 all artifacts gone and it works perfectly