Enabling volumetric fog in Unreal Engine can add depth and atmospheric effects to your scenes, enhancing the overall visual quality and immersion. By following a few simple steps, you can enable this feature and even enhance it further with additional fog materials and textures.
https://dev.epicgames.com/community/learning/tutorials/qjEK/fortnite-fab-how-to-enable-volumetric-fog-in-unreal-engine-uefn