Help with Non euclidean impossible space trick

I made an impossible space effect with stencil shaders.

There is no teleporting because everything is so close together.
It works great with only one person and now I don’t know how to hide other players and items.

Is there a way to make other players avatars disappear when entering a trigger?

Can I change the players layer to a custom layer?

You can’t change a player’s layer, however you can stack rooms vertically on top of each other and do relative teleportation to hide them

there are ontrigger enter and leave events you can abuse for that