Interior Rooms and Doors
Doors are a lot more fluid in the third version but there is currently one best practice to ensure that your door is generated properly. When a door is placed, it needs to have two walls to attach itself to. These walls will then have cutouts added and the door is fully created on both sides.
To ensure that a door is created correctly, it is ideal if the two walls share common anchor points. This will mean that the walls are connected and straight, allowing the door to be generated. This might require that the rooms on each side are adjusted so that both ends of the wall touch each other – like in the picture below.