Sparse Structures Mod (1.21.11, 1.20.6) – Better Structure Generation

Sparse Structures is a worldgen utility mod that lets players control how frequently structures spawn across their Minecraft worlds, making buildings rarer or more common through a simple configuration file. Available for Fabric, Forge, and NeoForge, it works with vanilla structures, modded structures, and even datapack-added structures alike.

Anyone who has played a heavily modded Minecraft world knows the problem: install five or six structure mods and suddenly every biome is packed wall-to-wall with castles, dungeons, villages, and towers. Exploration loses its thrill when there is no empty wilderness left between points of interest. Sparse Structures solves this by letting you increase the spacing between structure spawns — or decrease it if you want a denser world. With over 5 million downloads on Modrinth, it has become one of the most trusted worldgen tuning tools in the community, and modpack creators regularly include it as a balancing layer on top of their structure mod selections.

Key Features of Sparse Structures

• Per-Structure Configuration — You can adjust the rarity of every individual structure in the game, including those added by other mods and datapacks. This means you do not have to choose between "all structures rare" or "all structures common" — you can make villages frequent while pushing mansions much further apart, giving you granular control over your world's feel.
• Improved Structure Spread Algorithm — The mod uses a custom salt based on each structure's ID to prevent clustering. In vanilla and many modded setups, structures with default or identical salt values tend to pile up in the same chunks. Sparse Structures eliminates this problem, distributing structures more evenly across your world for a natural, hand-crafted feel.
• No Separation Limit — Vanilla Minecraft caps structure separation at 4,096 chunks (roughly 65,000 blocks). Sparse Structures removes this ceiling entirely. If you want strongholds to spawn only once every 100,000 blocks for an ultra-hardcore survival experience, this mod makes that possible.
• Structure Disabling — Setting any structure's spread factor to 0 completely disables its generation. This is a clean way to remove specific structures you dislike without needing to edit datapacks or delete mod files, and it works for both vanilla and modded structures.
• MC-177381 Bug Fix — The mod fixes a long-standing vanilla bug where the /locate command returns incorrect distances between the player and the nearest structure. This quality-of-life improvement means your locate results are actually reliable, which matters for both casual play and technical builds.
• Dump Structure Sets Command — The /dumpstructuresets command exports all registered structure sets to a file formatted for direct use in the config. Instead of manually hunting through mod source code to find structure IDs, you get a ready-to-edit list with one command, saving significant setup time in large modpacks.

Screenshots

How to Install Sparse Structures

1. Install your preferred mod loader: Fabric (with Fabric API), Minecraft Forge, or NeoForge for your Minecraft version.
2. Download the correct Sparse Structures file for your Minecraft version and loader from the download section below.
3. Place the downloaded .jar file into your .minecraft/mods folder (or your modpack instance's mods folder).
4. Launch Minecraft once to generate the default config file at config/sparsestructures.json5.
5. Edit the config file to adjust spread factors for individual structures — higher values make structures rarer, lower values make them more common, and 0 disables them entirely.

Requirements & Compatibility

What's New

• Updated to Minecraft 1.21.11 with full compatibility across Fabric, Forge, and NeoForge.
• Continued support for the latest NeoForge builds alongside legacy Forge versions.
• The mod has been actively maintained since its September 2023 release, with the most recent update in December 2025.

Pros and Cons

Alternatives to Sparse Structures

• Chunky — A chunk pre-generation mod that pairs well with Sparse Structures by letting you pre-generate terrain after configuring your structure spacing, so you can preview results before committing to a world.
• Towns and Towers — Adds new villages, pillager outposts, and structure variants to the game. Using it alongside Sparse Structures lets you enjoy the extra content without overcrowding your world.
• YUNG's Better Structures — A collection of structure overhaul mods that redesign vanilla buildings. Combine with Sparse Structures to get higher-quality structures at a controlled spawn rate.

Download Sparse Structures

Always download mods from official sources to stay safe.

Frequently Asked Questions

Does Sparse Structures work with modded structures?

Yes — Sparse Structures automatically detects and applies to all structures registered in the game, including those from other mods and datapacks. You do not need to manually register modded structures; they appear in the config file after running the /dumpstructuresets command and can be individually adjusted.

Can I use Sparse Structures to make structures more common instead of rarer?

Yes, you can decrease structure spacing to make them spawn more frequently. While the mod's primary use case is spreading structures further apart, the configuration works in both directions, letting you create denser worlds if that suits your playstyle.

Will Sparse Structures affect already-generated chunks in my world?

No — changes only apply to newly generated chunks. Structures that have already spawned in explored areas will remain in place. If you want to see the full effect of your configuration changes, you will need to explore new territory or start a fresh world.

Is Sparse Structures compatible with Fabric, Forge, and NeoForge at the same time?

Yes — the mod provides separate builds for Fabric, Forge, and NeoForge. You need to download the correct version for your specific loader. All three versions offer the same features and use the same configuration format, so switching loaders does not require relearning anything.

Does this mod cause performance issues in large modpacks?

The mod appears to be lightweight based on its design — it modifies structure placement rules during world generation rather than running continuous processes. Since it reduces the total number of structures being generated (when configured to increase rarity), it may actually improve chunk generation performance in heavily modded worlds with many structure mods installed.

You May Also Like

Lazyboys No Global Sounds Mod (1.21.11, 1.20.1) – Stop Global Sounds

2 weeks ago

Apprentice's Codex Mod (1.21.1, 1.20.1) – Early Magic Expansion

1 week ago

Flashback Mod (1.21.11) – Replay And Redefine Your Minecraft Moments

5 days ago

Zeta Mod (1.21.1, 1.20.1) – Library for Quark and More

1 month ago

Reinforced Chests Mod (1.21.11, 1.20.1) – Levels Up Your Minecraft

1 week ago

Saturn Mod (1.21.1, 1.20.1) – Optimise Performance

2 weeks ago