Sanctuary

you begin on a lone monolith above an endless void

Quick challenge

How far can you run before the mobs catch you?

Sanctuary

1.21.11 is a Fabric world preset for Minecraft 1.21.11 that transforms the Overworld into a floating-island world centered around a handcrafted survival spawn zone.

Start in a curated central sanctuary, then travel outward into a vast procedural skyworld of islands, ruins, caves, and distant horizons.

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Features

- Floating-island Overworld preset - Handcrafted central survival zone near spawn - Custom island generation with multiple landform presets - Curated biome area around origin - Procedural floating islands farther from spawn - World creation customization screen - Friendly with many biome-expansion mods - Vanilla survival focused

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World Design

Sanctuary blends three generation layers:

1. Custom Central Island Generator Builds the main spawn landmass.

2. Sanctuary Biome Zone A controlled region near spawn for a stronger early-game experience.

3. Fallback Overworld Biome Source Expands naturally into broader procedural floating islands in the distance.

Safe start, dangerous horizon.

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Customization

When creating a world, Sanctuary includes configurable settings such as:

Shared Settings

- Main Island Preset - Starting Biome - Deepslate Core - Vertical Profile - Sanctuary Zone Scale - Main Island Scale - Archipelago Size - Archipelago Spacing - Sanctuary Gap

Main Island Presets

Monolith

A single massive central island.

Fractured Archipelago

Multiple broken islands clustered together.

Hollow Crown

A ring-shaped formation with a hollow center.

Spire Garden

A smaller hub surrounded by tall stone spires.

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Biome Mod Compatibility

Sanctuary is designed to work better with biome mods than with total worldgen overhauls.

Usually Compatible

- Mods that add Overworld biomes - Datapacks extending vanilla biome distribution - Surface biome packs

These biomes may appear:

- outside the Sanctuary zone - in the Starting Biome selector (if safe for spawn)

Less Ideal

- Mods replacing the full Overworld generator - Separate custom world preset mods - Heavy terrain overhaul mods

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Requirements

- Minecraft `1.21.11` - Fabric Loader `0.19.1+` - Fabric API - Java `21+`

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Installation

Install like a normal Fabric mod.

Place the `.jar` file into your `mods` folder.

Multiplayer

Install the mod:

- on the server - on all clients

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Notes

- Outer island transition is still being tuned - Worldgen changes only affect newly generated chunks - Ore distribution settings are planned for future updates

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