Relighting was achieved by the use of cinematic cameras, sequencer and the render queue in Unreal Engine 4.
Train asset from Clinton Crumpler.
https://www.artstation.com/ccrumpler
All post-process was done directly in Engine with additional camera controls.
Reference taken from The Evil Within.

Breakdown:
https://www.artstation.com/calvincropley/blog/y0Ky/relighting-breakdown-subway-train