[robertsdionne]

Related, but still 3D, these are non-euclidean 3d geometries: https://3-dimensional.space/

I like the S3 geometry, which is essentially floating around on the 3d-surface of a 4d ball, also described here: https://www.mathinees-lacaniennes.net/images/stories/article...

[0xndavd]

Thank you. I'll check them out.