Unfortunately, no. You can use a trigger to spawn or trigger a win zone or dynamic entity, but you can't trigger a trigger. However, you can spawn a trigger via an entity. For example, I have a map that the player picks up and spawns a trigger. In the properties for the map, under AI Automated IF Used field, I put in the name of the trigger. Then in the properties of the trigger under AI scripts Start, I use the appearifactivate.fpi script. So the way it works is when the player enters the room, they pass the trigger which has not been activated. When they pick up the map, it then spawns the trigger and when they go back out of the room, the trigger runs.
So in your example, the player could enter the room and pickup an object, which could spawn your trigger at the door.
- BlackFox