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  1. Minecraft: Java Edition
  2. MC-172980

Light does not propagate across chunk borders properly

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    Details

    • Type: Bug
    • Status: Reopened
    • Resolution: Unresolved
    • Affects Version/s: 20w08a, 20w12a, 20w15a, 20w17a, 20w19a, 1.16.2 Release Candidate 2, 1.16.2, 1.16.3
    • Fix Version/s: 20w22a
    • Labels:
      None
    • Confirmation Status:
      Confirmed
    • Category:
      Lighting
    • Mojang Priority:
      Important

      Description

      The bug

      When 64 or more light emitting blocks get placed in one chunk at the same time, the light level in the neighboring chunks is not updated correctly.

      To reproduce

      1. Create a new flatland world
      2. /time set midnight
      3. Run
        /fill ~ ~ ~ ~63 ~ ~63 sea_lantern

        while on the ground

      4. Enable chunk border overlay (F3+G)
        The light will not have updated properly in some places
      5. Replace the sea lanterns with air again
        /fill ~ ~ ~ ~63 ~ ~63 sea_lantern

        The light did not update properly again

      Video

      https://youtu.be/lbIkC16GHYQ

      Original description

      i was building a house and then all of a sudden i noticed that one half of the house was bright and lit while the other was mostly dark with light patches.

      in the photo you can see the split. in the video i switch between the light block and dark block and they have the same light level even though they visually are different.

      i had no lanterns before this and the same thing happened.

      i tried updating the blocks around and it worked but then returned when i updated other areas.

      you can see in the second video that it will just flicker when i try and update the blocks.

      the other 2 screenshots are just other odd things that the lighting caused.

      you should also know that i placed most of the roof with the /fill command if that helps

        Attachments

        1. 2020-02-23_15.27.00.png
          2020-02-23_15.27.00.png
          384 kB
        2. 2020-02-23_15.35.40.png
          2020-02-23_15.35.40.png
          330 kB
        3. 2020-02-23_15.42.02.png
          2020-02-23_15.42.02.png
          256 kB
        4. 20200523_194614[1].mp4
          8.45 MB
        5. 2020-08-10_16.29.27.png
          2020-08-10_16.29.27.png
          1.02 MB
        6. 730b43a6f1d3a3c949de2ecdce0d3b5e.mp4
          3.21 MB
        7. a491aaa8d82380e36d5d22b77a5ca4a9.mp4
          4.10 MB

          Issue Links

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              People

              Assignee:
              Unassigned Unassigned
              Reporter:
              galaxion4 solartron3000
              Votes:
              15 Vote for this issue
              Watchers:
              10 Start watching this issue

                Dates

                Created:
                Updated:
                CHK: