Goal was to create a post apocalyptic scene which felt inviting and would show the "natural" occurrence if humans were not around. Scene uses dynamic lighting. Distance Field Ambient Occlusion enabled and default engine LUT daytime on post processing. Fog settings were subtle but needed to add the decent looking sun-shafts from the directional light. I also used planar reflections for the puddles. I included some details of the settings I used. Scene assets from Evermotion, Gumroad and UE4 Marketplace.
Volumetric Fog Lighting Test - 4k - Unreal Engine 4.16
Timelapse - Overgrown Ruins