A Layered or Multi-Layered Universe/Dimension/Reality, etc.

[Extreme123dz]

So, i heard this from other topics/threads, so I ask this:
- What exactly is a Layered or Multi-Layered Universe / Dimension / Reality / Phases / Steps. etc?
- How does this work?
- How should it be taken?
- In which works is it perfectly valid to use this as an epxlication or does this exist in such works?
- Heach Layer can be a Dimension (Higher/Lower Dimension?)?
- Can each Layer contain an infinite/transfinite/AD Infinitum Numbers of other layers, Higher and Lowers Dimensions, Universes/Multiverses, posibilities and imposibilities/non-existence of posibilities, interactions, threaths, Time-Lines, Toughts, etc?
- How in this wiki should works this concept?


The only example i see this is form I/O.

 

[PairusDragonoid]

Bump!

 

[TartaChocholate]

Yeah, I am curious about it as well. In theory is not so hard to grasp, but it's tricky to get when you can say "oh yeah, this is a higher dimension, this guy is 4-D, 5-D", etc. Unless they openly say state so like Mister Mxyzptlk.