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Structure Expansion Mod Wiki & Guide

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Structure Expansion Mod is a Minecraft mod that increases the size limit of vanilla structure blocks. In earlier versions, it expanded the limit from 48x48x48 to 127x127x127, but in later versions, it extended it even further to 256x256x256.

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Contents (4)
  1. Guides
  2. Frequently asked questions
  3. Gallery
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Guides

Step-by-step, in-game.

Filling Huge Regions With the Expanded /fill CommandWhat Changed The mod raises the volume the /fill command will accept, so you are no longer blocked when the two…How to Save a Build Larger Than the Vanilla Structure Block LimitPreparing the Area Place a structure block and set it to Save mode. Open its interface and switch the corner/offset…Troubleshooting Structure Blocks That Won't Save or LoadThe Box Won't Grow If the size sliders stop early, you have hit an axis limit. Confirm the mod is actually loaded…Using /structure clean to Strip Air Blocks From a Saved StructureWhy Remove Air Saved structures store every block in the bounding box, including empty space. When you paste a large…

Frequently asked questions

How do I actually get the bigger structure block limit to work?
Just place a structure block and set its size as usual — the mod raises the cap automatically, so you can type dimensions far beyond the vanilla limit. If the size field still refuses your numbers, the mod isn't loaded or you're editing a block from a different mod.
What's the maximum size I can save now?
The mod raises the vanilla limit in stages, with later versions allowing structures up to 256x256x256. Older builds of the mod cap out lower, so check which limit your version enforces before planning a build.
Why won't my structure block save a build that's within the new limit?
The most common cause is that the structure block's bounding box extends outside loaded chunks or into unloaded terrain. Stand near the center of the region, make sure all chunks are loaded, and try saving again.
How do I use /structure clean?
Run /structure clean with the name of a structure file you've already saved. It strips air blocks out of that file, which shrinks the file and can make loading faster.

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