This excludes passenger wagons with automation systems that opens the door on the carriage with the press of a button. Hi, the idea behind this feature is quite simple. At the moment in first person mode you walk up to a door and click on it which them opens. The new way would mean you'd click and hold the door and open it yourself and progress it yourself until it's fully opened. To give an example take class 09's isolation box door. You have to click and hold and drag it (the slider) to open all the way or partial. Of course you'd still see the door mechanisms work like before. This feature would mean tampering with the game to achieve this feature may introduce partial glitches or bugs for the first few times but It will be patched up.