Room loading in mph

So in between rooms are what I call transition hallways. This is where the next room will load.

Now, when the next room loads, the values corresponding to your position completely change.

My theory is that when a room loads, the previous room unloads, and the new room is placed where the old one was. The transition hall either moves, or a new one is made, and you get moved by a predetermined offset creating the illusion that the new room is next to the previous room and the illusion that you haven't moved.

This would likely be done due to hardware limitations.