Perdia exists for the characters in one limited plane at a time each one feels and looks like it extends forever but if you try to walk away from the point of interest (center if you will) you find you make no progress. Each plane can be anything form a stunning desert world covered in rainbows reflected off of floating cubes of water to a plane where the floor is like water sending ripples as you walk across. Something is always at the center of each plane sometimes its a sign, a random usable item like a row boat, a single standing obelisk, or ect. All characters have no need to eat or drink and in turn have no need to use the restroom, all they can remember is wandering this world, and if they ever meet one another they start sharing planes. Each plane seems to be constantly pushing for someone to reach a revelation of some kind (Example: in the desert world with floating cubes of water after touching the obelisk in the center the cubes fall and a character realizes that the cubes will never come back and paint the world in rainbows), after a revelation is reached or a specific task is completed and the character(s) sleep the world switches planes. This universe strives to bring about deep thinking and stunning interaction between characters. I'd love to hear opinions and thoughts on this!
I know that the themes are different, but the rules of the universe remind me a bit of Aquavania from the Riverman series. I think it would be interesting to use this world as a thought experiment - do you have any sort of plot? I'm curious as to what the plot would be.
I had the general idea that it would focus on a group of characters meeting up and suddenly experiencing the difficulties and benefits of working together. Essentially its characters who have had little to no interaction with others and have each developed their own extremely unique way of looking at their world and dealing with challenges. It would start off innocent enough with them enjoying company and discussing each others experiences but then slowly they're differences would begin to build into conflict which interferes with how their journey is playing out. The end goal is that the group is for the most part broken up and each of them taking away a life lesson or presumed life lesson. Sorry for the late response!
Just some food for thought: You could also turn this around into a 'split personality' type story. The main character suffered major trauma and to cope break his/herself into different persons how experience different things. In order to become 'whole' each personality has to work together to find the 'main epicenter' plane - the one where the innocent person is hiding away from all the pain. There have been documented cases of individuals whose personalities could handle certain trauma - for instance, a little girl would get beat if she made any noise so her 'other self' had no mouth and therefore could not make any noise.
I really like this idea and it seems like you have a unique way of approaching it. You could also have members of the group be from different cultures to further diversify your groups experiences and how they would relate to each other.