Uploaded image for project: 'Minecraft: Java Edition'
  1. Minecraft: Java Edition
  2. MC-142228

Skylight shines through blocks


    • Icon: Bug Bug
    • Resolution: Fixed
    • Minecraft 19w02a, Minecraft 19w05a, Minecraft 19w06a, Minecraft 19w07a, Minecraft 19w08a, Minecraft 19w08b, Minecraft 19w09a, Minecraft 19w11a, Minecraft 19w11b, Minecraft 19w12a, Minecraft 19w12b, Minecraft 19w13b, Minecraft 19w14a, Minecraft 19w14b
    • None
    • 64-bit Java, Windows 10
    • Community Consensus
    • Lighting

      Mod Notice

      If your world is still affected by this because you upgraded it from 1.14, please follow the following steps in order to fix your world:

      Singleplayer: Select world → Edit world → Optimize world → check "erase cache data" → Backup and load

      Multiplayer: Start the server.jar with the following command:

      java -jar server.jar --forceUpgrade --eraseCache

      This only needs to be done once, after this you can start your world or the server the usual way again.

      Minecraft Realms: Download the world from your realm, copy it into your Minecraft singleplayer worlds folder, follow the steps for singleplayer, and then upload the world back up to your realm.

      If the issue occurs again after you've done these steps, please leave a comment.

      I was making giant enclosure in the sky for mob spawning so they would path into water and fall enough to almost die. However, I couldn't get it to work as for whatever reason, some blocks saved the light level of the sky during day, re-emitting it. So even at night, mobs don't spawn except in maybe a corner. The issue seems to multiply every time I relog, as I've made effort to fix the issue by replacing blocks, and when I have finally managed to fix it in a section, a relog caused it to come back. This happened with regular blocks, slabs and double half slabs.

      As you can see in the screenshots, there was a corner where mobs could theoretically spawn for whatever reason. This was also during the night, so it's not just blocks letting the light through. Hopefully this will be fixed in a way so I don't have to replace so many blocks when a fix rolls around.

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            fry [Mojang] Georgii Gavrichev
            Schpau Schpau
            30 Vote for this issue
            20 Start watching this issue