Hi,
Relighting The Old west Learning project to study light and mood with Unreal Engine 5.4 , Lumen and HDR sky light to create a dark blueish mood. I tested the Niagara System to add some local fog effected by lights and lumen GI. also I added Directional Light with a very low angle and used Sky atmosphere to edit the directional light effect. Post processing volume is used to adjust the Exposure , Lens effects and color mood.
Old West Learning Realtime Relighting with Lumen