I want to cover my entire world in water and make it look like it’s flooded and the water has covered mountains and villages.
Can someone give me a command to use?


1 Answer 1


You can brute force this with the clone and fill commands, along with a few command blocks.

⚡️ Get Command Blocks

You can't craft command blocks, nor can you find them in the creative menu. Instead you'll need to use the give command to give yourself one:

give @s command_block

💡 The Concept

In order for this to work, you need to create a self replicating system. It's slow, but, it'll work. This answer will create a basic system that uses a stack of command blocks to wrap itself with stacks of command blocks. So we'll start with a single column, and the world will slowly fill with more and more columns by creating 3x3 grids:

Screenshot of gold and emerald blocks demonstrating the aforementioned grid.

In the screenshot above, the emerald block represents the initial column, and the gold blocks represent the columns it creates. Since each of the newly created columns are exact copies of the original column, this creates a recursive system that self replicates forever.

For the purposes of this post, I will NOT be demonstrating how to stop the system, but it can be stopped with the scoreboard and testfor commands and some changes to the layout, taking into account the rules surrounding water.

⌨️ Placement and Commands

For this to work, you'll need to create a 10 block high column of command blocks that feed into each other. I highly recommend building this in the sky as I did so that structures are unimpacted, but you can place it anywhere. The commands are as follows, assuming that the lowest command block is line 1 and the highest is line 10, respectively:

clone ~ ~ ~ ~ ~10 ~ ~1 ~ ~
clone ~ ~-1 ~ ~ ~9 ~ ~-1 ~-1 ~
clone ~ ~-2 ~ ~ ~8 ~ ~ ~-2 ~1
clone ~ ~-3 ~ ~ ~7 ~ ~ ~-3 ~-1
clone ~ ~-4 ~ ~ ~6 ~ ~1 ~-4 ~1
clone ~ ~-5 ~ ~ ~5 ~ ~-1 ~-5 ~1
clone ~ ~-6 ~ ~ ~4 ~ ~1 ~-6 ~-1
clone ~ ~-7 ~ ~ ~3 ~ ~-1 ~-7 ~-1
fill ~ ~-125 ~ ~ ~ ~ water 0 replace air
fill ~ ~-10 ~ ~ ~ ~ water

The way this works, is that each clone block is responsible for cloning the entire column to one of the surrounding coordinates. Then, the last two blocks are responsible for replacing air with water and removing the command blocks.

📝 Configurations

The configurations are relatively straightforward. The lowest command block (block 1) is the only one with a repeating configuration:

Always Active
100 Tick Delay

🚨 Note: Do NOT set the configuration for the lowest command block until all others have been set. If you trigger the system before you're done with all the other command blocks, they will begin overwriting each other, preventing you from finishing the system and forcing you to create a new world.

Command blocks 2 through 8, plus command block 10, should be given a chain configuration with the no delay:

Always Active
0 Tick Delay

Finally, the 9th command block should be given a delay of less than or equal to the delay in ticks used for the lowest block, to ensure the newly created columns don't overwrite it:

Always Active
50 Tick Delay

🥳 The Result

A world full of water!

Screenshot of some tree tops under water.

🎲 Be Careful

Since this is a recursive system, it may take a few attempts to get it right, so work with it in a new world until you understand what it's doing, and are confident that you won't botch the setup:

Screenshot giving an example of what can go wrong with the setup

Another screenshot giving an example of what can go wrong with the setup

  • 1
    I realize I can't award the bounty until a day later lol, whatever
    – c1uq92
    Commented Sep 16, 2021 at 1:01
  • @c1uq92 thanks! 🙏 don’t forget that you can upvote the answer too!
    – Taco
    Commented Sep 16, 2021 at 1:27

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