the developer should also include internal 3d and interior view which you can see the inside of the train carriages and the engine itself when you view the train from the outside of it. you should also include moving npcs that walk around the platform at each station also make a sequence where you can walk around the inside of your train or on the platform in 3d either in first person, or when your in third person camera angle. also add a conductor to each passenger train that boards your train at the first station you approach and enters the carriages.add sound effects with the conductor like him yelling all aboard when outside the train or going around to each carriage saying tickets please. Also include train engineers for the steam locomotive with animations seen moving the coal and for the passenger trains add a driver to the cab.