going through realms

iAmGlobal

ok, so this may sound confusing but, i was going through mathx's museum, (like the one with all the glitches and stuff) and i entered one of the realms made by Cubic Castles account, but when i left, i went back to eden. i think that there should maybe be a door that only appears when someone enters through another realm (with a little symbol or sum to tell the difference) so that way you can go back to the original realm without needing to eat another warp or sum