When Saubon dies he falls and stops and hell rises up to meet him all indicating to me a direction and movement in that direction. Same with how hell is described within the arc how there is torsion which again implies direction and twisting in some dimension.
This is a good example of what i was trying to say with dimensions.
https://www.youtube.com/watch?v=N0WjV6MmCyM
I understand what you mean, but our minds would see dimensions even if there is none (even in reality), since they are wired that way, or, more specifically, since this framework of understanding is taught in school, which is why it's useful for explaining concepts to readers. But it's not the only way, and a limited one at that. The Outside is a place of souls, which aren't a physical concept. It's more to do with philosophy and the notion of thought than with the concept of physical space.
Well it's the product of Bakker's mind , the video i posted actually shows we wouldn't see the higher dimensions with our minds, unless in specific circumstances.
Kellhus explains the soul using dimensions as well to Akka, imagine you could get the depth of an ocean "inside" you. Also the 5th dimension would be like looking at time from a singularity. You'd see the heat death of the universe from start to finish. The whole pattern would be laid out.
"Kellhus nodded, his expression at once cryptic and bemused. "Imagine," he said, "that you could take the Great Ocean, in all its immensity, and fold it into the form and proportion of a man. There are depths, Akka, that go in rather than down — in without limit. What you call the Outside lies within us, and it's everywhere. This is why, no matter where we stand, it's always here. No matter where we dare tread, we always stand in the same place."