I have seen the disappearing tunnel a few times, what I want to know is how to build one, and if it can be done with (i'm assuming) the 0-27 track that i have?

Over the past few weeks I have been designing my o guage layout, a modest 8x 8.5 table. it will have a 0-72 main outer with a o-36 switch yard in the middle. I have been trying to think about how to make it stand out a little more, so I bought some 2" rigid styrofoam that I can put the switch...