Hello,
When I read the thread about the "Umbilic Torus" track, it reminded me of the art by M. C. Escher:
https://www.google.com/search?q=Escher& ... s&tbm=isch
He did some very famous "impossible buildings" and such. I understand that his art cannot be made into tracks - and I am the last to show any talent in track editing - but maybe this artist and some of his works might trigger the talents here for further inspiration.
If you have other thoughts and sources for "impossible tracks", maybe this thread can serve as a spot to collect and discuss.