Thread:SemiaCloud/@comment-22439-20141113173505/@comment-1073312-20141114010953

Yes and no, there are alien dimension-like things in the Sci-fiverse.

The fiction universe has a hyperspace, a sort of hyper-dimensional space (possibly artificial) which permits one to "hop-skotch" vast distances in realspace. The universe was further extended in Realities Altered and Legacy with multiple timelines connected to each other, while not really dimensions I suppose they are alike in context. We also had a Universe 66501 (which has been destroyed), and I created a set of stories based in universes of different physical laws.

There are also metaphysical Planes of Existence, which are probably closer to how people might imagine a dimension non-mathematically.

Do you want to create a dimension for it? I would suggest that is probably not a good idea for the sci-fiverse and its not an easy starter fiction.