For this project, I was inspired by the CitySubwayTrain environment that you can download custom on the Unreal Engine Marketplace. Not only that, I also chose to integrate it into this project.
For this project, I started out by drawing my level in Photoshop before integrating the CitySubwayTrain environment into Unreal Engine and blocking out the remainder of the level.
This is currently a work in progress; more screenshots will be coming soon. Please stay tuned!