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  1. Minecraft: Java Edition
  2. MC-55172

Mobs do not spawn at the heights 16, 32, 48, 64, 80... (Multiples of 16)

    Details

    • Type: Bug
    • Status: Resolved
    • Resolution: Fixed
    • Affects Version/s: Minecraft 1.7.9, Minecraft 14w19a, Minecraft 14w21b, Minecraft 1.7.10, Minecraft 14w28a, Minecraft 14w29a, Minecraft 14w29b, Minecraft 14w30c, Minecraft 14w31a, Minecraft 14w32d, Minecraft 14w33c, Minecraft 14w34b
    • Fix Version/s: Minecraft 14w34d
    • Confirmation Status:
      Confirmed

      Description

      Hostile Mobs will not spawn at certain heights if the darkness they would spawn in is caused by the night. So if the skylight is 0 mobs WILL spawn at these heights.

      The heights are:
      16, 32, 48, 64, 80, 96, 112, 128, 144, 160, 176, 192, 208, 224, 240
      (basicly every 16*n)

      I guess this is due to the fact that Chunks are split up vertically in parts with the height of 16. So the problem occurs if a mob spawns inside one part, but the block it spawns on is inside the part below.

      How to reproduce:

      1. Singleplayer
      2. Create new World
      3. Gamemode: Creative
      4. More World Options...
      5. World Type: Superflat
      6. Customize
      7. Presets
      8. paste the following preset into the box at the top: 3;64*minecraft:stone;1;
      9. Use Preset
      10. Done
      11. Create new World
      12. set the time to night (/time set 18000)

      No mobs will spawn!
      You can use the preset 3;63*minecraft:stone;1; or 3;65*minecraft:stone;1; instead and they will spawn.

        Attachments

        1. 14w21b 74 Mobs in 3 seconds.png
          14w21b 74 Mobs in 3 seconds.png
          702 kB
        2. 2014-05-14_17.42.31.png
          2014-05-14_17.42.31.png
          134 kB
        3. 2014-05-14_23.11.44.png
          2014-05-14_23.11.44.png
          101 kB
        4. 2014-05-14_23.12.45.png
          2014-05-14_23.12.45.png
          182 kB
        5. Mob spawning.rar
          162 kB

          Issue Links

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              People

              • Assignee:
                dinnerbone [Mojang] Dinnerbone (Nathan Adams)
                Reporter:
                quijx Quijx
              • Votes:
                21 Vote for this issue
                Watchers:
                9 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved:
                  CHK: