Good day,
I used this multipart tutorial to make portals with recursion: https://www.youtube.com/watch?v=YFzs56fXouA
While the recursion works great, it is very expensive, so I was wondering is it would be possible to do a recursion system similar in the game Ultrakill. My idea is to have the first 1-2 recursions are real ones and the ones afterward are "fake" recursions. I think it works by taking the first recursion and copy-pasting it down to as many recursions as wanted, allowing for the infinite look while being less expensive to render. I put a video example with this post to demonstrate how it works in Ultrakill, I hope it can help.
While looking for an example to work from, I did see it mentioned that this would not work if the portals are not parallel, but this won't be an issue with the portals I am making.
Thank you for your time, and to any responses!