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World boundary

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The world border, by default, marks the area exactly 1 chunk before the 30,000,000 mark.

The world boundary is the area at the edge of the Minecraft world.

Definition[edit | edit source]

The boundary of the world has several "layers".

The first layer is the world border, which lies at X/Z ±29,999,984 by default, and establishes an arbitrary blockade to prevent the player from advancing. There are several methods of bypassing this border.

The second layer lies exactly one chunk further, at X/Z ±30,000,000. At this point, there is an invisible wall preventing the player from advancing, even in spectator mode. Using commands such as /tp will not work, since the game will not accept any value beyond ±30,000,000. However, by using a minecart (in a superflat preset in which the top layer is rails), the player can reach even further, up to ±X/Z 30,000,192; at that point, the player is frozen in place until the minecart is killed, and then the player will be teleported back to the ±30,000,000 mark.

The third and final layer lies at X/Z ±30,000,192, which can be considered the absolute edge of the Minecraft world, as chunks will no longer generate beyond this point. It is impossible to advance past this point without the use of external modifications.

The maximum possible height is 1.797×10308, the limit where mathematics break down in the game's code[verify]. If the player attempts to teleport beyond this limit, the game will disconnect the player with an Invalid move packet received client error. This occurs even on singleplayer. The only way to fix this is by moving the player back with an external tool.

Effects[edit | edit source]

Generally, long server response times caused by massive distances will produce unintended results, but most blocks and entities will behave normally, with a few exceptions:

  • Gravity-affected blocks (such as
    sand
    and
    gravel
    ), while falling, will jitter in bizarre patterns for several seconds, but will ultimately land on the ground as normal.

  • Water
    and
    lava
    will fall normally, albeit at a much slower pace due to long response times.
  • Extended
    piston
    s
    may sometimes not render until they receive another block update.
  • Flame and smoke
    particles from certain blocks, like
    monster spawner
    s
    and
    end portal
    s
    , only appear on the side facing away from the edge.
    • Flame particles will still appear around the entire mob spawner block as a mob is spawning.
  • Beyond the X/Z 30,000,000 mark:

    • Mobs will not spawn at all.

    • Lighting does not update (with exception to sunlight and moonlight).

    • Items may jitter slightly.

Beyond this, most of the unintended behavior of blocks and entities is caused by the world border (as detailed here), rather than the massive distances of the boundary itself.

History[edit | edit source]

Beta
1.8 The Far Lands phenomena was removed, as an unintended side effect of the large changes in the terrain generator.
The playable area now abruptly ends at 30,000,000 meters, or 1,875,000 chunks in a single direction, and "fake chunks" (where chunks of bare terrain render, but physics do not function properly) start generating.
Official release
1.0.0 Many lighting glitches and strange air pockets form on multiplayer, although untested in singleplayer.
1.3.1 12w18a Fake chunks will start generating chunks as of the regular world; at this point players could go over the 32 block limit.
12w25a The game now only lets players travel past 30,000,032 until it throws an "Illegal Position" error at X/Z ± 32,000,000.
1.7.2 13w36b Minecraft crashes after X/Z: ±29,999,840 on Default, Large Biomes, and AMPLIFIED worlds.
13w37a There is an invisible wall at X/Z: ±30,000,000 that goes up to Y: 2,147,483,647. Walking on this wall far enough will cause the game to crash.
All blocks (including air) within the invisible wall act as solid blocks. Because of this, if the player is moved outside the boundary via commands or external tools, they will be unable to move.
Beyond the invisible wall, if items are thrown, the falling animation will be very jittery. The thrown item will disappear upon contact with any block other than air.
Beyond X/Z: ±32,000,000, the player will be kicked out with an "Illegal Position" message.
Some mobs (e.g. slimes) try to go past the world border.
1.8 The invisible wall was replaced with a proper world border, removing a large portion of the effects of the world boundary.
Fake chunks beyond the world border will no longer render, instead giving way to the Void.
At X/Z: ±30,000,001, the game will freeze. Any players who attempt to go any further will be kicked by the server, with the message "Illegal Position". The only way to fix this is to move the player back through the use of external programs.
1.8.2 1.8.2-pre4 The game no longer kicks the player for attempting to teleport beyond the world border, nor does the game freeze. However, the generated world does appear to become increasingly barren towards X/Z: ±30,000,000, and dropped items begin to 'clump' together in certain places.
1.9 Teleporting past X/Z 30,000,000 is no longer possible; the player will always remain before 30,000,000, even when using external programs.
Chunks beyond X/Z 30,000,000 are now rendered again, until X/Z 30,000,192. Many of the issues surrounding block and item rendering have also disappeared; with this, the world boundary is now generally more stable. Also, the chunks beyond X/Z 30,000,000 are now solid and now can perfectly generate structures like villages, mineshafts and trees.

Issues[edit | edit source]

Issues relating to “World boundary” are maintained on the issue tracker. Report issues there.

Trivia[edit | edit source]

  • Traveling from one edge of the world to the opposite edge by powered rail would take 35 days and 10 hours. Building the rails for such a trip would require enough iron and/or gold to fill over 723 double chests even when packed into blocks, as well as sticks made from enough wood to fill over 135 double chests (as log blocks, not as wood planks, and excluding the redstone torches). ( 53 stacks of logs would be required just to make enough chests to hold all the building materials for this rail track.) If already crafted, the rails required would fill 17,361 double chests. If you had to gather the materials to make all those rails, you'd wear out 14,404 diamond pickaxes and 300 diamond axes (on average, about 3,601 diamond pickaxes and 75 diamond axes, both enchanted with Unbreaking 3).
    • There's also the obvious fact that even if one were to amass all these materials, actually laying said track would require the player to travel the entire distance through other means anyway. As such, while this may be the fastest method, it is impossible unless you have already been there at least once.
    • Then there's the obvious fact that you need redstone torches. A torch can optimally light 17 blocks, so 3,529,412 torches are required. That requires 55,148 sticks/redstone dusts, which requires 2042 large chests, which requires 128 stacks of log blocks to make the chests (which requires 3 large chests!).

Gallery[edit | edit source]

Effects prior to 1.8[edit | edit source]