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  1. Minecraft: Java Edition
  2. MC-130858

Pistons are no longer transparent

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    • Icon: Bug Bug
    • Resolution: Fixed
    • Minecraft 1.13-pre2
    • Minecraft 1.13-pre1
    • None
    • Confirmed

      The bug

      Pistons are no longer transparent when not extended. When triggering just a few pistons in a simple redstone circuit the light updates cause extreme client and server lag.

      How to reproduce

      1. Make a box / room from opaque, solid blocks so that no light can enter
      2. Replace one block from the ceiling with a piston, pointing up or down
      3. Toggle the piston state with a lever / button, for example

       

       The client and the server will experience severe lag, beacuse of the excessive light updates

       When multiple pistons with slime blocks are working in a redstone circuit, the performance is decreased drastically

       

      Related to MC-130722

      Analysis by adam279: Affects 17w49b, not the version before that.

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        5. 2018-06-05_15.42.41.png
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        6. 18w44a.png
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        7. 18w43c.png
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            searge [Mojang] Searge (Michael Stoyke)
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              Created:
              Updated:
              Resolved:
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