Structure Block Unlimiter

Structure Block Unlimiter

A lightweight utility mod that uncaps the Structure Block's size and render distance, transforming it into a powerful tool for large-scale building.

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606 Downloads
neoforgegame-mechanicsutility
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Screenshots

Structure Block Unlimiter Screenshot 1
Structure Block Unlimiter Screenshot 2
Structure Block Unlimiter Screenshot 3

About this Mod

A simple, quality-of-life mod that removes the vanilla restrictions on Minecraft's Structure Block, unlocking its true potential for builders, server admins, and creative minds. Save, load, and manage massive structures with ease and precision!


Features

Have you ever tried to save your megastructure, sprawling city, or complex redstone contraption, only to be stopped by the frustrating 48x48x48 block limit? This mod fixes that and adds powerful new tools for on-the-fly manipulation.

  • Fully Configurable Size Limit: The maximum size of a structure is increased from a tiny 48x48x48 to a massive 512x512x512 blocks by default. You can change this limit in the config file to whatever your machine can handle!

  • Extended Render Distance: The structure's bounding box is now visible from much further away, increased from 96 to 256 blocks by default (also configurable). No more running back and forth to see if your alignment is correct.

  • "Re-open Last" Keybind: A configurable keybind (default: G) allows you to instantly re-open the GUI of the last Structure Block you interacted with, no matter where you are in the world. A huge time-saver!

  • Dynamic Grid Resizing (New!): Intuitively resize the structure area without opening the GUI! Simply look at a face of the bounding box and use the new keybinds (default: Up/Down Arrows) to push it away or pull it closer. It works from both inside and outside the box.

  • Dynamic Grid Shifting (New!): Nudge the entire structure area one block at a time. A new keybind (default: V) moves the bounding box in the direction you are looking, allowing for precise, quick positioning.

  • Client + Server: This mod is required on both the client and the server to enable all features.

  • Lightweight & Vanilla-Friendly: No new blocks, no new items. Just powerful tweaks to a vanilla feature that make it infinitely more useful.


How It Looks

Increased Bounding Box Render Distance

See your entire project outline from afar.

Screenshot of increased render distance

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New "Re-open Last" Keybind

Instantly access the Structure Block GUI from anywhere.

Screenshot of keybind usage 1
Screenshot of keybind usage 2


Configuration

This mod is fully configurable. After running the game once, a config file will be generated in config/structure_block_unlimiter-common.toml.


#The maximum size (per axis) that a Structure Block can save or load.
#Vanilla default is 48.
# Default: 512
# Range: &gt; 1
max_structure_size = 512

#The distance in blocks from which the structure's bounding box is visible.
#Vanilla default is 96.
# Default: 256
# Range: &gt; 16
render_distance = 256

The keybind can be changed in the standard Minecraft controls menu, under the category "Structure Block Unlimiter".


Available Versions

Structure Block Unlimiter 1.1.0release
MC 1.21neoforge
August 19, 2025
Structure Block Unlimiter 1.1.0release
MC 1.21.8neoforge
August 19, 2025
Structure Block Unlimiter 1.1.0release
MC 1.21.7neoforge
August 19, 2025
Structure Block Unlimiter 1.1.0release
MC 1.21.6neoforge
August 19, 2025
Structure Block Unlimiter 1.1.0release
MC 1.21.5neoforge
August 19, 2025

How to Install Structure Block Unlimiter on Your Server

1

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

2

Set neoforge Loader

In the panel under "Egg", select the neoforge loader and matching Minecraft version (1.21.8).

3

Install Mod

Open the mod browser in the dashboard and search for "Structure Block Unlimiter". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

neoforge

Minecraft Versions

1.21.8, 1.21.7, 1.21.6 (+6 more)

Server-side

Unsupported

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Structure Block Unlimiter server crashes on startup – what to do?

Most common cause: wrong neoforge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.8). You can switch loaders with one click in the panel.

Is Structure Block Unlimiter compatible with neoforge?

Structure Block Unlimiter officially supports neoforge for Minecraft 1.21.8, 1.21.7, 1.21.6. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Structure Block Unlimiter – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Structure Block Unlimiter consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.

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Install Structure Block Unlimiter with just one click on your server.

Recommended RAM
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Details

License
MIT License
Server-side
Unsupported

Supported Versions

1.21.81.21.71.21.61.21.51.21.41.21.31.21.21.21.11.21