This is a sci fi interior modular environment kit that can be used to create infinite interior variations.
Smoke in scene is from default Start Content.
This product supports Lumen for Unreal Engine 5.0+
Link for Lumen documentation:
https://docs.unrealengine.com/5.0/en-US/lumen-global-illumination-and-reflections-in-unreal-engine/
Environment kit example video:
Video Link: https://youtu.be/MvLO1V2wBn4