Locomotives emit puffs of smoke as they advance.

The tracks wind around in 3-space and pass over each other.

Trains are routed by the train track switches (shown in yellow). The routing ensures that the trains never cross paths.

A switching malfunction is simulated, routing both trains to the same point and causing a fiery collision.

Two shots showing the structure of the train tracks. Here the menu is turned on, and a help string is displayed under the menu telling the user how to manipulate the camera view.