At the center of every galaxy is a 10+ dimensional black hole and yes, we are a 4d projection shadow of it.
The ghost world is in the 5th-10th dimension.
Every alternate universe is arranged the same way.
Then we could theoretically create our own using math and computers, could we not?
It is easier than that. All you need to do is wrinkle time with a singularity. The wrinkled time itself automatically creates a copy of your current universe. Step into the copy and you can go forward or backward in the time of this copied universe. The second singularity keeps you from being crushed into the first singularity. Now I make this sound simple, but atomic energy is needed to run things. That is the reason for the civil defense detection equipment.