Originally Posted by Misnik
I do have to wonder how Daed mob portal works so close to spawn. Such a short distance.
I did what we aren't allowed to do, but as I consider myself well educated in the science of portals I thought it would be safe (and it is). I built the portal in the nether manually
It's really quite easy to make a good connection.
1) Build your portal in the normal world
2) Write down x and z coordinate
3) Divide x and z coordinate by 8 (make sure to keep signs)
4) If your portal doesn't connect in the nether as you want it to (for example it connects to the 0, 0 portal or to my tower portal), build a new portal at the x and z values you calculated (remember signs!).
This should never break an existing connection, except some normal world connections that will link to this portal instead of the original nether portal, but they can fix the problem by building their own nether portal (using this method).
This works because the game always try to put you at the portal closest to the intended position, but it has A LOT of leeway (1024 blocks). Therefore usually you will end up in the 0,0 portal. But if you create another portal that is CLOSER than the 0,0 portal you will end up there instead (even though the 0,0 portal is still within range). It's important though that this new portal is on the exactly right spot or it will create a new portal somewhere in the normal world if you use it from the nether. It must be within 16 blocks from the calculated value, or it won't link back to the original portal. This is when peoples rosegardens get messed up.