UE5 DLSS enable instant crash

Gaming and Visualization Technologies DLSS
,
1

Hi!

I set up Unreal Engine 5 and tried to enable DLSS with the following BP commands (all are executed right after BeginPlay):

r.NGX.Enable 1
r.NGX.DLSS.Enable 1
r.NGX.DLSS.Quality -1
r.NGX.DLSS.Quality.Auto false
r.NGX.DLAA.Enable 0

(this is in a freshly created VR game template)

When I now run the VRPreview, it runs from around seconds to a minute (doesn’t look like DLSS is on) and then the whole editor crashes with following crash message:

Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000128

UnrealEditor_D3D12RHI
UnrealEditor_D3D12RHI
UnrealEditor_RHI
UnrealEditor_RenderCore
UnrealEditor_RenderCore
UnrealEditor_RenderCore
UnrealEditor_Renderer
UnrealEditor_Renderer
UnrealEditor_Renderer
UnrealEditor_Renderer
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_RenderCore
UnrealEditor_RenderCore
UnrealEditor_Core
UnrealEditor_Core
kernel32
ntdll

Despite the crash, it also looks as if DLSS is not enabled in VR, in the viewport it works though.

I really appreciate the help :)

2

DLSS Plug-in for unreal 5.1.1 is broken for VR for almost 6 months. No ETA or official workaround from NVIDIA.
There is a community workaround but didn’t work for me.
At this point I’m looking at alternatives.