What do the walls of am finite demi-plane look like?

[WayneLigon]

If it were not a demi-place contained within a solid, like the Elemental Plane of Earth or something similar, I'd just have it appear infinite. If they had some means of determining this, as they got closer to the 'boundry, their path would just ... 'move'... so they were headed back the other way.

 

[tonym]

What exists at the end of an infinite plane?

A wall of blackness encloses the plane, like a sphere. The wall is a dense, immaterial nothingness. Matter, energy and magic cannot effect the blackness, nor push beyond the surface, which is not a surfrace. Nothing can stick to the blackness, nothing can "harm" it. Reality ends here.

The blackness can be any color.

Tony M

 

[jdrakeh]

Assuming that the adventurers are in a demi-plane that is of a finite size. For the sake of convenience let's assume that it's a circle with a diameter of 5000km. If the adventurer's reached the outer-most point of it, what would they find? Would there be some kind of visible, physical wall? Would it bring them to the other side of the plane? How would you handle this?

Depends. Ravenloft utilizes moving borders (mists, zombie mobs, etc) that redirect travelers (or kill them). Dungeonworld utilized cavern walls and, to a larger degree, actual corridors that pretty much directed travel through that demi-plane, much as hallways do through an office building. Both approaches are valid. It's really a matter of what you want to do and/or like. Choose something that reflects the nature of the demi-plane itself.

 

[wingsandsword]

If the plane is particularly lawful, a series of signs leading up to it:

First you'll see: "Caution: Reality Ends Ahead"

Followed by: "Reality Ends 500 Feet"

And posted at the edge: "End of Reality"

 

[Torm]

The blackness can be any color.

I just wanted to see this repeated.

 

[The Curious D1]

One I've been particularly fond of is an ever-evolving demi-plane...One that grows or shrinks based on what it is defined by (tree...woods...falls...sound...?...etc.)...such as a demi-plane of turkey-gravy...(or, my stomache after this last Thanksgiving)...the further you get to the currently-defined edge of the demi-plane of turkey-gravy, the more turkey-gravy there is to see as far as the eye can see (or sense/determine by any means, including mayhaps the memory itself). Setting up a demi-plane in this way can cause the demi-plane to become unstable, especially if a large amount of denizens just start wandering in the direction of the boundaries all at once...I would imagine it would cause a donut effect, so that the center where everyone was not able to sense any more (including lingering memories) would slowly negate and disappear as creatures travelled further away from it. I would also imagine this would explain why some demi-planes grow or shrink based on how many creatures are on it (so that if suddenly one million troops landed in the demi-plane of pumpkin-pie, there would suddenly be a lot more pumpkin pie to go around). This is kind of reflective of the theory behind a lot of planes in Planescape, where if too much area of Limbo becomes overly lawful, it slips over and becomes a cog in Mechanus (after signing the appropriate paperwork, mind you). If one used this system for a particular demi-plane, I wonder what would happen to an item that were left behind and got negated? If the path were retraced, would it reappear? And if so, would it have aged?

 

[JustKim]

Unstable space. You're walking along the demiplane, the plants and animals get a little sparse, the air becomes thin, and without warning- pop!- you're shunted out into the astral plane, or whatever plane the demiplane is built on.

I like the misdirection of fog or mazes that turn people back where they came from, until high-level divinations enter the equation. I don't like physical barriers at all because these are normally things PCs overcome, and logically you should be able to see something that reaches forever into the sky from just about any distance. When you get into nonphysical barriers, it strains the suspension of disbelief. A PC touches the nothingness, what happens? It's not a wall, it has no substance, but you can't reach through it either, it has no space. It's not black, it has no observable qualities. It's not cold, it has no temperature. It just.. isn't.

So, unstable space.

 

[philreed]

When we wrote A DM's Directory of Demiplanes, one of the things we discussed was what the edges of a demiplane would look like. In the end we settled on different desctiptions for each demiplane (after all, a small chamber will have walls while a floating god will have an endless sea of nothingness).

I think each and every demiplane should have a different way in which its edges are defined/treated. While there will be some generalities, the details are what help to make a demiplane unique.

 

[Altamont Ravenard]

When you get to the edge, you see yourself in front of you, facing yourself, like a mirror, but it's the beginning of a different reality.

AR

 

[Tetsubo]

How about a Dyson Sphere...? A hollow shpere with the demi-plane in the inside...