How can I fix UE5 Lumen Shadow quality?


unknown horizontal line and stains

A directional light coming through a window.

I use Directional light, ExponentialHeightFog, Volumetric Cloud, Sky Light, Sky Atmosphere and all movable

Directional Light Volumetric Scattering intensity 4.0
SkyLight Real Time Capture On
ExponentialHeightFog FogDensity 0.05 Volumetric Fog On

project settings Lumen

And Wall and Ceiling is same material but ceiling is so dark. (Base Color White and Roghness 1.0)

Try this