Non-Euclidian Level Design
Non-Euclidean Level Design (Portal 2 Version)
I massively approve of stuff like this. Relativity is one of my favorite art pieces.
I played with something similar in Newmaps. Episode 2, level 4. The same exact concept used here, I used in E2M4. (Though, obviously, more crude.)
Beware if you don’t have a firm grasp of multidimensional space.