Lumen GI and Reflections feedback thread

Hi everyone. I did some tests with Preview 1 and with many neat improvements I’ve run into a problem with my metal materials package. How did they look on UE4:



And how they looks in UE5 Preview 1:



Anything that was not fully matte now appears so blurry…

Switching back to Screen Space Reflections in UE5 Preview 1 works brings sharpness back but at some roughness values material becomes black for some reason:


So I have tons of black artifacts from my roughness maps in random places.