Yes, that’s true! That goes ahead and even strengthens such an Idea! I was trying to think how maybe that wouldn’t work for the sake of playing devil’s advocate on my own Idea, but I found nothing. I thought maybe it could only be done between the Earth and Moon because the Lunarians are familiar with Earth and Likewise, but that’s just false, as the Lunarians scarcely descend to earth because they see it as impure, so they wouldn’t have enough information on earth to set up such a tunnel. That also shot down another theory that maybe a spirit from another Gensokyo reconned our Gensokyo to create the tunnel, as it’s clear that to form the tunnels information isn’t needed. Without being able to form a sensible contradiction, that means that the Idea of Fantasy tunnels can exist since they don’t need information to their destination. It could be explained that maybe the reason the Moon and Earth are connected is because they both have traces of magic/faith, and if that’s how tunnels form, then it makes sense that Fantasy tunnels subconsciously connect the fantasy barriers due to traces of magic/faith from each barrier. Either way, if that somehow is a contradiction or is disproven then it doesn’t really matter anyways. The tunnels simply are, and there’s not much more to say about it. (Also, my bad for getting so carried away with this Idea, it’s a fun concept to poke around with, lmaoo)