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  1. Minecraft: Java Edition
  2. MC-188079

Spiders can spawn in one block high spaces if the top block is transparent

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    Details

    • Type: Bug
    • Status: Open
    • Resolution: Unresolved
    • Affects Version/s: 1.15.2, 20w49a
    • Fix Version/s: None
    • Labels:
      None
    • Confirmation Status:
      Community Consensus
    • Category:
      Mob spawning

      Description

      Description

      Spiders can currently spawn in one block high spaces if the top block in transparent. In more detail, the current spawn code requires there to be a space of 3x3x1.5, however, the extra half block required gets ignored if the top block is transparent (glass for example).

      Original report

      I was trying to create a spawning platform limited to spiders, and placed a platform of opaque blocks, and two blocks above that I placed glass blocks. I expected this to still allow spiders to spawn, but they did not. I then changed the glass blocks to another transparent block, bottom slabs, and spiders subsequently spawned.

       

      Steps to reproduce:

      Open a new world.

      Create a platform with opaque blocks.

      Leave a one block high air gap.

      Create a platform with glass blocks above the air gap.

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            Assignee:
            Unassigned Unassigned
            Reporter:
            Acurs Joar Gunnarsson
            Votes:
            1 Vote for this issue
            Watchers:
            2 Start watching this issue

              Dates

              Created:
              Updated:
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