Hyperbolic Non-Euclidean World (2007) (web1.kcn.jp)

I think the picture is still not complete without the imaginary axis. Would that axis be curved too?

What software was used to draw the pictures? Was it in visual basic 6? Looks pretty nice.

For everyone who wants to experience hyperbolic geometry, I recommend HyperRogue (https://roguetemple.com/z/hyper/).