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Probably sky is finite in Minecraft but I can't seem to reach the end of it. I can't go higher than 256 blocks (or whatever is defined in the server.properties file) with WorldEdit, but when flying I can actually go higher.

So, if sky is finite (which it probably is), then where is the end?

2

Yes and no.

You can fly as high as your want in Creative or Spectator mode. However, you cannot place any blocks above y256. This is why you can't fly above y256 in MCEdit.

  • What I meant with 'the end' is not 'The End', but literally the end of the sky. – William Edwards Oct 2 '14 at 18:34
  • Also I'm talking about just the sky in the overworld. – William Edwards Oct 2 '14 at 18:34
  • Hold on, I'll edit it in a moment – Oxion Oct 2 '14 at 18:36
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    @WilliamDavidEdwards Then as you say in the question and as this answer says, You can place blocks up to 256, but the game has no issue with you flying up forever. Presumably the same code that 'ends' the world in X and Z directions will also end it in the Y direction – James Oct 2 '14 at 18:36
  • @SPCOxion Thanks for the edit :) Now the answer is simple and it actually answers the question. I'll accept it in a minute. – William Edwards Oct 2 '14 at 18:42
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Yes. It is limited to Y:4,503,599,627,370,494.179. Any player above this level will be automatically kicked out of the server for the reason "Illegal stance".
See this video for more information.

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    For anyone interested, that's 2^52. Presumably they are using a 64-bit integer to store Y coordinates, so the remaining values are used for negative Y coords (and 0). – Alex Oct 22 '14 at 13:01
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    @Alex: It's a 64-bit floating point number (AKA double-precision), which is why the limit is 2^52, not 2^64 - double-precision floating point only has 53 bits of precision, so at that value, the "gaps" between adjacent numbers become too big. – Michael Madsen Oct 22 '14 at 14:49
  • @MichaelMadsen I admit I made a superquick assumption based purely on the number. Thanks for the info. – Alex Oct 22 '14 at 15:01

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