What problem causes black HDRI backdrop? GBuffer Issue?

Hello,

today i tried some twaeks at my scene. I follow the Webinar for Automotive and Raytracing, recentrly published by Epic Games.
I wanted to add the “SkyAtmosphereLightDiscLuminance”. After Compiling, the whole HDRI went black.
Resetting this new function didn’t work.

After searching for hours, I recognized, that turning the GBuffer Format back to “Default” solves the issue for the moment. But then the image quality is worse.
Yesterday, everthing worked, also with “High Precision Normals” GBuffer Format.

I also migrated the Level into a new Project, but with the same result. Replacing the HDRI Backdrop with a new one, doesn’t solve this either.

It is also black with "r.RayTracing.ForceAllRayTracingEffects “0” or “1”

Is that a bug? Restarting the PC or UE doensn’t change anything.

Thank you.

I am having the exact same issue and no one I talk to seem to have any answers :frowning:

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