Custom Terrain

Custom Terrain is a, pure worldgen, server-side datapack for Minecraft 26.2. It combines refined surface terrain modifications with deep cave biome expansion into one seamless world generation pack with all custom gameplay systems removed to maintain full compatibility with vanilla Minecraft.

Supported Versions

Version	Pack Format	Type	Status
26.2	107.1	Server-side datapack	Full support

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What's Included

This pack delivers:

• Expanded Surface Biomes: Extensive biome variations with custom structures and terrain modifications
• Specialized Cave Biomes: 8 underground biomes with depth-layered feature generation (lime caves, mushroom grottos, amethyst chambers, frozen caverns, molten chambers, sulfide caves, deeprock caverns, and deep dark expansion)
• Merged Dimension Data: Unified biome source combining all surface and underground biomes into one cohesive worldgen file
• Pure Worldgen: No enchantments, no custom items, no bosses only terrain and structures
• Clean Installation: Drop-in datapack with no resource pack or mod dependencies required

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Key Features

Feature	Description
100+ Surface Biomes	Completely regenerated biomes with unique structures and terrain variations
8 Cave Biomes	Specialized underground biomes generating at different depths
Combined Biome Source	Single overworld.json merges all surface and cave biomes
Feature Rich	Custom ores, vegetation, and cave features at appropriate depths
Structures Included	Villages, temples, railways, trial chambers, and hidden caverns
Zero Gameplay Changes	Pure terrain modification no custom items, enchantments, or bosses
Server-Ready	Works on dedicated servers, no client install required
Cross-Reference Validated	All registry references resolve to either vanilla or pack-defined content

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How to Use

1. Create a new world and place custom_terrain.zip in the datapacks/ directory
2. Or install directly on a server and reload with /reload
3. Generate new chunks to experience the merged terrain
4. Explore surface variations and the expanded underground

Tip: For best results, create a new world. Existing worlds will regenerate terrain only in newly explored areas.

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Installation

Drop the custom_terrain.zip file into your world's datapacks folder, then reload the world with /reload or restart.

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Pack Details

Property	Value
Zones	1710 base biomes + 24 cave biomes
Height	Standard -64 to 320 range
World Type	Overworld

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A unified world where the surface meets the depths crafted for explorers who prefer pure terrain without gameplay bloat.