I have started to build a mob far in Minecraft Pocket Edition. It is a basic farm built at exactly the height limit. You can see the outside in the picture below.

The top of the mob farm

The problem is inside the spawn platform, the light level stays the same as outside. For example, it looks as if sunlight is shining inside, but it is not.

enter image description here

The roof is made entirely out of full spruce wood plank block, and not slabs or stairs. Is this a glitch, or is it supposed to be like that? The ceiling is at exactly the height limit, which is 128 blocks in the current version. I am in Minecraft Pocket Edition version 0.13.1, the latest as of the start of 2016.

Is it because of the small distance from the height limit, or the tube? There is a Jack-o-lantern at the bottom of it, but a 55 block way down. The farm is directly above the world spawn, so there is a lowered part in the ceiling. I'm not sure if light can pass through the blocks at a diagonal edge, aslthough there are some cases where this can happen.

  • Not so sure about PE, but on the PC version, there's a bug where this happens in artificially closed-in spaces.
    – rivermont
    Jan 8, 2016 at 14:14
  • This question is pretty similar.
    – rivermont
    Jan 8, 2016 at 14:27

1 Answer 1


This does seem to be a bug: blocks at the top of the world don't block sunlight. I would suggest reporting the issue at the MCPE issue tracker; in the meantime as a workaround you can drop the ceiling down a block and that should fix it.

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