[quote=@Balance]
<Snipped quote by Stabby>

What is non-dimensional space?
[/quote]

If you want an old but explanation, you can check out the old post and subsequent ones.
https://www.roleplayerguild.com/posts/4890583

But in short, it is a void like plane where things can can only exist as mental summaries of their existence (ie. as thoughts and concepts) due to the lack of even a single dimension in which matter can exist. Because of this there is also no concept of "direction" in that void and one will just randomly start appearing in subsequent nearby locations when they move. If a non-sentient object is not observed, accounted for, or otherwise expected to exist by a sentient entity that also enters non-dimensional space at around the same time, it will cease to exist. Likewise, should a sentient entity fall unconscious or leave without taking the object with them, the object will also cease to exist.