I am lame at this, so I watched several tutorials..but!!
I already had my Nether portal in the Overworld, so I took its coordinates, divide them by 8..then took notes.
I went in, of course, I also already have a Nether portal in the Nether...but its coordinate were off it seems. So, I built another portal in the Nether, according to the divided coordinates I had. Well, if I take this new one...it creates a new portal in the Overworld. I do not end up in my original portal. But, if I take my original portal in the Overworld, it does takes me to the new one in the nether. I am confused...and getting a tad annoyed.
Coords of my original Overworld portal : x/z -193,-192/-100
Coords of the new Nether portal : x/z -24.-23/-13
Creates a new Overworld portal at : x/z -205/87,88
How did you get to negative Y coordinates in the Nether and the Overworld?
Anyhow, if that is really where your portal is (at negative Y) I'd bet the game is only searching from 0 to 256 in the Overworld for a matching portal.
Thus, a portal at -Y in the Overworld (or at Y >= 256) will never be found to be accessed from the Nether.
Likewise a portal with Y < 0 in the Nether won't be found by the game when entering a portal from the Overworld.
I ended up rebuilding the old portal in the nether...and then it works. Strange indeed, because these coords are not at all what should be working.
Coords of the nether portal(old) are this : 34/-6.-5 where 34 is X and -6,-5 are both Z. So..I kind of gave up, since at least, I end up where i should, both ways!
Problems happen when portals are very close together and especially when one portal is higher than the other. I studied portal behavior in creative and was able to make a "ring" of four portals. Overworld portal A went to nether portal B. Nether portal B went to overworld portal C, and overworld portal C went to nether portal D. Finally, nether portal D took you back to overworld portal A. It was all done by adjusting their relative heights so that the portal I wanted was the first one found when it searches the world for active portals.
The way I build my nether hub and rail system is the first portal I make, I pillar up to almost the bedrock ceiling (I go to Y=118) and build everything up there so I can avoid lava pools and ghasts. I build a new portal at the correct X,Z and then, and MOST importantly, I destroy the original nether portal. All my nether portals are on the same Y=118, and they always link up correctly.
In all my attempts, the portal in the overworld that was created was either higher, or lower, than my original overworld one. If i would enter the new nether portal by one side..then it would create a new overworld portal above water(sea)..you walk off, you drink.
if i would enter that same nether portal by the other side..then it created a new overworld portal in a cave, way lower than my original one. (i would destroy the new overworld portal at every attempt, of course..otherwise, it would simply use it)
My main concern was that I wanted to keep my original overworld portal as it is, a way back and forth to both dimmensions. I have no desire for a new one.
Must be a problem with the Y coordinate then, although according to the Wiki the game will search the entire Y space of the overworld (within 128 X,Z blocks of desired location) when coming from the Nether.
No clue. Y is 67 for the overworld portal, and 68 for the nether one. Nothing weird there. All the other portals i created for other stuff works as intended...that one was the only stubborn one!
I am lame at this, so I watched several tutorials..but!!
I already had my Nether portal in the Overworld, so I took its coordinates, divide them by 8..then took notes.
I went in, of course, I also already have a Nether portal in the Nether...but its coordinate were off it seems. So, I built another portal in the Nether, according to the divided coordinates I had. Well, if I take this new one...it creates a new portal in the Overworld. I do not end up in my original portal. But, if I take my original portal in the Overworld, it does takes me to the new one in the nether. I am confused...and getting a tad annoyed.
Coords of my original Overworld portal : x/z -193,-192/-100
Coords of the new Nether portal : x/z -24.-23/-13
Creates a new Overworld portal at : x/z -205/87,88
How did you get to negative Y coordinates in the Nether and the Overworld?
Anyhow, if that is really where your portal is (at negative Y) I'd bet the game is only searching from 0 to 256 in the Overworld for a matching portal.
Thus, a portal at -Y in the Overworld (or at Y >= 256) will never be found to be accessed from the Nether.
Likewise a portal with Y < 0 in the Nether won't be found by the game when entering a portal from the Overworld.
My Overworld portal was built just next to my spawn chunk...
So of course, dividing a negative by 8, also gave me a negative for the nether coords.
Oh..sorry, I get it. You took my second coordinate as the Y!..but no. the ones separated by comma are just both portal blocks on where you stand.
This is why i wrote x/z and then my coords. As you know, a 2 by 3 portal is..well, 2 wide.
So you can forget about negative Y as it is not the case.
The big building you see is the whole spawn chunk. You actually spawn on the roof when you are new and joining the server.
I ended up rebuilding the old portal in the nether...and then it works. Strange indeed, because these coords are not at all what should be working.
Coords of the nether portal(old) are this : 34/-6.-5 where 34 is X and -6,-5 are both Z. So..I kind of gave up, since at least, I end up where i should, both ways!
Problems happen when portals are very close together and especially when one portal is higher than the other. I studied portal behavior in creative and was able to make a "ring" of four portals. Overworld portal A went to nether portal B. Nether portal B went to overworld portal C, and overworld portal C went to nether portal D. Finally, nether portal D took you back to overworld portal A. It was all done by adjusting their relative heights so that the portal I wanted was the first one found when it searches the world for active portals.
The way I build my nether hub and rail system is the first portal I make, I pillar up to almost the bedrock ceiling (I go to Y=118) and build everything up there so I can avoid lava pools and ghasts. I build a new portal at the correct X,Z and then, and MOST importantly, I destroy the original nether portal. All my nether portals are on the same Y=118, and they always link up correctly.
In all my attempts, the portal in the overworld that was created was either higher, or lower, than my original overworld one. If i would enter the new nether portal by one side..then it would create a new overworld portal above water(sea)..you walk off, you drink.
if i would enter that same nether portal by the other side..then it created a new overworld portal in a cave, way lower than my original one. (i would destroy the new overworld portal at every attempt, of course..otherwise, it would simply use it)
My main concern was that I wanted to keep my original overworld portal as it is, a way back and forth to both dimmensions. I have no desire for a new one.
Must be a problem with the Y coordinate then, although according to the Wiki the game will search the entire Y space of the overworld (within 128 X,Z blocks of desired location) when coming from the Nether.
Either that's not so or your game glitched.
Or the facts provided are off.
No clue. Y is 67 for the overworld portal, and 68 for the nether one. Nothing weird there. All the other portals i created for other stuff works as intended...that one was the only stubborn one!
Your results would be explained if you had a brain fart and built your new Nether portal at X,Z = -24, 13 instead of X,Z = -24, -13.
Yeah. I actually found no real explanation as to why for that particular one, it refuses to work.