In my early days with Trainz and GMax, I made some rather crude, model- railway like representations of the Classic Paris Metro rolling stock, something I had wanted to do for many years for a conventional model railway. Now that I'm dabbling in "virtual" model railways, they still please me if I consider a Metro layout to have been made in the fifties (1950s that is!) when printed paper sides of coaches were common. If you'd like to see them, look for Sprague. I also made a range of stations, tunnels etc. using names beginning Metro. The track seems to have been fairly popular.
Ray