Invisible portal idea

I have been playing around with a few different layouts that have track running from one location across the layout under the table to a staging yard or another area of the layout. Is it possible or has there been an exploration into making a “magic portal” where trains that go through the portal show up on the track at another portal point? This would be helpful for incoming traffic or transporting trains from one location to another without the infrastructure of building track all under the layout as mentioned before.