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  1. Minecraft: Java Edition
  2. MC-175133

Water and lava surface is sometimes rendered from below even if there are blocks above

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    • Icon: Bug Bug
    • Resolution: Unresolved
    • None
    • 1.15.2, 1.16.1, 20w28a, 1.16.2 Release Candidate 2, 1.16.2, 1.16.3, 1.16.4 Pre-release 2, 1.16.4, 20w51a, 21w03a, 1.16.5, 21w06a, 21w14a, 1.17, 1.17.1, 21w37a, 21w40a, 1.18 Pre-release 5, 1.18.1, 22w03a, 1.18.2 Pre-release 3, 1.18.2, 22w16b, 1.19, 1.19.2, 1.19.3, 1.19.4, 23w17a, 1.20, 1.20.1, 23w32a, 1.20.2, 1.20.3 Release Candidate 1, 1.20.4, 23w51b, 1.21
    • Confirmed
    • Rendering
    • Normal
    • Platform

      The bug

      Flooded/underwater rooms get a ceiling of water as if reaching an air surface, even directly below a solid block.

      If the solid block is replaced with a waterlogged block the "water surface" effect is removed. But a solid block produces the water surface effect. This is intermittent, it does not effect all blocks in this way, however I have been unable to determine why, or find a work around this purely visual, but incredibly annoying bug for anyone building under water.

      I think it has something to do with proximity to glass, extending 1 block away.

      To reproduce

      1. Build this structure and fill it with water
      2. Go inside
        → On the edges of the room's ceiling, you'll see the water surface
      3. Break the middle block and replace it with glass
        → Now the water surface is visible everywhere

      It would be expected that the water ceiling only renders from above, but not from below.

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        6. farmland.png
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        7. mc_175133.nbt
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        8. Waterbug.png
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        9. waterbugNoPack.png
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            Unassigned Unassigned
            Galbadine Martin
            Votes:
            31 Vote for this issue
            Watchers:
            15 Start watching this issue

              Created:
              Updated:
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