How do you make a portal?

I was wondering if it is possible to make a portal???

By far a too general question. Beside the fact that all possible questions has already been asked & answerd here, a “portal” in video games can refer to a few things:

I guess you talk about portals like in Valves Portal, but as already said, this has been asked already and your question isn’t really detailed and specific like it should be according to the FAQs (which i guess you didn’t read).

I’m not sure.

If you’re asking how to create a surface that can see somewhere else and get you there if you walk through, it’s a combination of render texture and triggers.

If you’re asking how to make a portal game, there is a special button in Unity to create all the game instantly, but it’s hidden hehe !