Main issue: I was running the class 66 light engine with the correct lighting setup (whites front, reds rear). As the loco moved away from camera, the left hand tail light extinguished. As it got about another hundred yards away, the other tail light went out and the left hand headlamp (no markers) illuminated. Get close to the loco again and the lights are correctly illuminated. Also, the switch in the cab should put the tail lights up at the end the switch is located, not at the opposite end as per the game. The only GM locos set up like the game are the 59s and 66001 and 002 Additionally, when the key is removed, the marker lights should go out. In game, if you leave the cab and remove the key with the lights lit, they stay lit. Prototypically, if set to day or night the headlight stays lit but the markers go out. In yard lighting, all markers go out