The art for Train Trouble was done primarily by the Nixxes team who had partnered with Firewalk Studios. My role in the map was primarily during closing. I was tasked initially with helping find ways to increase performance and and optimize the map. That transitioned into some bug work and occlusion work.
Nixxes and an awesome job finishing this map. The design certainly made it tricky at times, but they landed it wonderfully. All credit to them!