I am building a massive fortress in creative and would like to be spared the monotomy of putting the floor in. I have access to commands and command blocks.

The modded server I am using is for running Minecraft version 1.7.2, and I can't update it because I'm not the server owner. Unfortunately this version does not have the /fill command at disposal, so I can't use that.

  • 1
    Possible duplicate of Is there a utility to replace one block type with another within a region?
    – pppery
    Commented Mar 1, 2022 at 4:41
  • In principle there could be a distinct question here, but in practice this question has attracted answers only that ignore the version restriction and suggestions to use plugins/mods, both of which are much better covered by the duplicate question.
    – pppery
    Commented Mar 1, 2022 at 4:42
  • 3
    @pppery We shouldn't judge a question by its answers, however. Those answers can be flagged.
    – Joachim
    Commented Mar 1, 2022 at 6:44
  • There's no flag for incorrect answers, and in any case the answers aren't really incorrect, just lower-quality duplicates of the answers to the other question.
    – pppery
    Commented Mar 1, 2022 at 17:00
  • 1
    @Joachim My judgement leads me to believe that MCEdit and other editors, as of now, are far inferior to /fill, so it should always be suggested first. Therefore, editing the other question to generalize it will justify this question's closure.
    – One 2 Many
    Commented Mar 3, 2022 at 5:38

5 Answers 5


There's not an automatic way to do this in 1.7.2. If you're willing to be patient for 1.8 to come out, you can use the /fill command.

  1. Go to one corner of your castle and press F3. Write down the coordinates.
  2. Go to the opposite diagonal corner in your castle and write down those coordinates too.
  3. Open the console, and type /fill x1 y1 z1 x2 y2 z2 gold_block with the above coordinates. This fills your entire castle floor with gold blocks.

or, if you're impatient, you can use the snapshots for a quick access then return to the current version (unless you're doing this on a server)


LavaTaco, another way to solve this is to use bukkit on the server. Install world edit, do //wand, select the floor, and set it to whatever you want


I am running on 1.7.10 with a lot of mods (with Forge) so I couldn't get a temporary 1.8 with this.

I ended up with this mod, [WorldEdit], which provides a lot of commands for easy world building. To fill a cubic area, I did the following:

  • Get a "wand" with //wand command (yes, some WE commands begin with two slashes, not one)
  • Left-click and right-click two blocks in the to corners. This creates a selection of the cubic area marked by those two blocks
    • If either of them is air, use /setblock to turn it into a solid block first (it's a MC builtin command)
  • //set obsidian and the area is filled with Obsidian, replacing everything.

A full reference of WE commands can be found here.

Disclaimer: I am not affiliated with that mod.


You do /fill ~1 ~100 ~1 ~25 ~25 ~25 minecraft:stone to make a giant floating block.


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