Please reader, BE SAFE. Sometimes immersive experience leads to accidents. One of my volunteer testers was near to fall down the stairs in my dorm when he was walking towards one of the final versions of the AR cave.
Plane detection finally worked in an precise way, allowing these three portals been accessible even in the relative narrow corridors of my dorm. In this stage, I tested the use of gifs as I did with videos; worked pretty okay as well.