I feel like most people have seen that video where some dude proposed the question of what would happen if you passed a portal through itself
so what would happen if you got one end of the portal and just perfectly aligned it with the other side? like, so it makes “1” portal or it looks like it does
I’d say it’d just make both portals inaccessible from being on each other, delete both, or cause a violent explosion due to the universe’s physics engine pissing it’s pants and causing the portals to be in every possible location at once, ripping everything apart
basically, if you’re using aperture portals, it’s literally impossible to stack them on-top of each other, because if you try, the portal just spawns to the side of the portal you’re trying to stack it onto
you’d probably just fall right through it as if it were air, or rather just hit a wall if you’re using a portal gun since those always apply onto portals
if they’re facing away from each other, it’d just be like traveling normally
if they’re facing towards each other, your body would squish against itself until you’re crushed
if the portals are both facing the same direction, then, assuming the portals are double sided, it’d just be like traveling normally
if the portals are both facing the same direction, then, assuming the portals are single sided, it’d be like walking into a wall or whatever happens when you walk into the back of a portal