If I trigger a command block to summon a redstone block 5 chunks away, (which subsequently triggers several other command blocks) but the server render distance is set to 4 chunks, will the redstone block still be summoned and execute the other command blocks?

  • Rule of thumb: Nothing happens unless it's closer than the render distance or inside the spawn chunks. That's true in 99% of cases. Understanding the remaining one percent takes days of learning how the game works, but you usually don't need it. Mar 19, 2018 at 13:00

1 Answer 1


If the chunk in question is not loaded, then no. Commands like /fill and /setblock cannot affect unloaded chunks, and will fail with an error message.

Some options:

  • Ensure that the chunks will be loaded, either by putting the command blocks in the spawn chunks or by building a chunk loader of some kind.
  • Instead of using command blocks, use functions. I recommend this option, as functions have much better performance than command blocks and are easier to edit once you get started. Then, instead of placing a redstone block, you can just do /function my_namespace:my_function to run your commands.
  • I just looked into functions and it looks interesting, but primarily a lot of the command blocks I am using are for "vanilla-friendly" minigames. A lot require a previous action to be done first, and functions seem to do all instructions in one tick. As an example, I need to summon minecarts on a single point, spread them around that single point, then teleport them all to a specific y level (as spreadplayers teleports to top block). I'm not sure how this sequence would work using functions. Mar 19, 2018 at 13:23
  • @JakeBristow yes, I guess that is like the biggest issue with functions. To provide timing, command blocks are still needed. Maybe a scoreboard-based clock that triggers functions via commandblocks located at spawn might do the trick.
    – Manchineel
    Mar 19, 2018 at 15:31
  • I think I might just set up the "control room" of command blocks beneath the respective minigame, that way it's always guaranteed to be loaded. Thank you for your advice though! Mar 19, 2018 at 15:38
  • @JakeBristow The first point in this answer about placing the command blocks in the spawn chunk is a good option. The spawn chunks are always loaded if there is a player anywhere in the world. Here is the wiki on spawn chunk. I recommend your control room be in these chunks.
    – IronAnvil
    Mar 20, 2018 at 0:43

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