Planes

Each Plane is its own shard of reality, Major and minor actions can create new planes with its own inhabitants and matter or nothing at all. There are many planes with their own qualities and ownerships. Planes also vary in size and scope, sometimes designed that way to suit the needs of its maker. Since each plane is its own reality.

Layout:

The Planes of the multiverse are not necessarily neat and organized making it quite dificult for aspiring planar travelers. To make it simple however imagine each material plane is a marble, and each marble has coating representing the echo planes. These marbles are are in a soup of the ethereal plane and that soup is spilled across a large bowl of the astral sea. There are gaps in the splatter where different planes can intrude. Outside the bowl is the void and this analogy is breaking down so I will redescribe it later.

Planes of the Multiverse

Prime Materials and its echos

These are the Planes that are part of the prime step for typical souls and the convergence of matter from the elemental planes and the influence of thought from the more outer ones.

Material Plane

Fey Wilds

DarkRealms

First World

Others..

Transitive Planes

These planes have special properties and often "border" other planes.

Ethereal Plane

Astral Plane

The Inner Elemental Planes

Air, Earth Fire, Water

The Outer Planes

16 Outer planes correspond to the eight non-neutral alignments and shades of philosophical differences between them.

Deity Planes

Others

Positive and Negative Planes