2010-11-01, 03:17 PM
I saw an excellent image that explains this, but the site crashed.
Imagine that the gate you make in the Real World has coordinates. The game tries to make a the second gate in the Nether using those coordinates. But the game defines it as unfit. "Unfit" could be anything from being over a sea of lava to being inside of a wall. The game then moves it to a 'fit' place. When you re-enter that portal, it creates a portal with the same coordinates in the Real World.
End result: Two portals in the Real world that both lead to the same portal in the Nether.
Now I have to wonder... if you hacked your Nether file to be solid block, where would your Nether portal spawn?
Imagine that the gate you make in the Real World has coordinates. The game tries to make a the second gate in the Nether using those coordinates. But the game defines it as unfit. "Unfit" could be anything from being over a sea of lava to being inside of a wall. The game then moves it to a 'fit' place. When you re-enter that portal, it creates a portal with the same coordinates in the Real World.
End result: Two portals in the Real world that both lead to the same portal in the Nether.
Now I have to wonder... if you hacked your Nether file to be solid block, where would your Nether portal spawn?