Code from this repository is rethinked and written in a better way in the new repository optozorax/portal. And better demo with mobius portals now has this link: https://optozorax.github.io/portal/?scene=mobius
Also, I recommend you to look at Mobius Monoportal: https://optozorax.github.io/portal/?scene=mobius_monoportal
Online demo: https://optozorax.github.io/mobius_portal/
If you have a low FPS, you can reduce window size of your browser.
