Dimensional Walls and Hubs

First one… What is a dimensional hub?

Okay… For a start, the easiest way to explain such a phenomenon is when there is a point where multiple dimensions touch a single point allowing for easy access to any neighboring universes with minimal difficulty.

A real-world example would be something like four corners in the USA. Anything planted on that point can go to any of those states with ease.

Although… Bubbles clustered together so they share walls also works.

In any case, you technically don’t need to cross a hub to enter another dimension, but… You can only access what is perpendicular to your own and is more complicated to pull off.

Another way to look at it as if someone in A wants get to C… However, they can’t just directly go to C without ending up as a giant cucumber or destroying their home universe in the process and going from A to B to C is expensive and time consuming.

Now if we look at a hub as something like a terminal… They can take a small detour through there and get from A and end up at C with minimal difficulty.

Believe it or not… That method is pretty common. Although the process is pretty much invisible to creator and user in most cases.

In any case, having control of a hub means that you have easy access to all adjacent universes. That and you don’t have to worry about ending up as a talking cucumber without any hands with a banana as a firearm or causing the end of both worlds as they know it.

_

On the subject of portals and boundaries

For a start… Picture each dimension having a sort of membrane protecting it from spilling into its neighbors. Now… I am having a bit of difficulty explaining it, but… I can say that trying to cross over without the aid of a hub is quite dangerous.

Now… If we’re talking portals between universes… There are two basic types… We’ll call them open or closed for now.

Both types operate by exposing that “membrane” in some manner. However, they have two very different benefits and trade-offs.

“Open” portals primarily function by forming an incision through this membrane and placing a structure over the opening to prevent it from healing. While it does allow for easy access… There is usually a form of a “draft” of energy seeming in from the other universe causing gradual corruption and instability if kept up for too long.

Like… The collision between two universes with dramatically different rules of physics.

“Closed” portals leave the membrane intact and simply allow access. While these are more stable and lack the problem of leakage… They tend to transform the traveler upon entry according to the universe’s rules.

So yeah… If that world has talking horses instead of humans… Say goodbye to your hands and feet until you can get back.