I have an NVIDIA RTX 2800 and an ATI Radeon RX 6800 for my desktop and my game is currently building with UE 5.1.1. I’m not currently seeing any issues with NVIDIA, but the ATI card shows major artifacts with ray traced shadows enabled. I can make this immediately go away by disabling it (r.raytracing.shadows 0), so I’ve added a path in my startup Blueprints to check for ATI and run that as a console command while my loading UMG widgets are showing.
For in-editor, you can add an editory utility blueprint to run the console command as well (see Running Blueprints at Editor Startup | Unreal Engine 4.27 Documentation)
r.raytracing.shadows 1:
r.raytracing.shadows 0:
