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Welcome to Substratum

Substratum is a Terra configuration pack that transforms Minecraft into a completely underground experience. Instead of traditional surface biomes, you’ll explore an expansive subterranean realm filled with diverse cave systems, each with unique terrain, resources, and challenges. Substratum underground world

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What is Substratum?

Substratum is built on the Terra world generation platform, creating a fully underground world that spans from bedrock to bedrock. The entire overworld becomes a massive cave system with interconnected biomes, each offering distinct visual styles, blocks, and exploration opportunities.

Full World Generation

Generate entire worlds as underground cave systems from Y=-64 to Y=319

Drop-In Compatibility

Add Substratum caves to existing Terra packs for enhanced underground diversity

14 Unique Biomes

Explore diverse cave environments from frozen caverns to molten passages

Custom Features

Discover unique structures, vegetation, and terrain formations in each biome

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Key Features

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Diverse Cave Biomes

Substratum includes 14 unique cave biomes, each with distinctive characteristics:
  • Honey Grotto - Honeycomb-filled caves with giant bee nests
  • Frozen Caverns - Icy caves with blue ice, powder snow, and icicles
  • Molten Passages - Lava-filled tunnels with magma blocks and basalt
  • Fungal Undergrowth - Mushroom-covered caves with giant fungi
  • Amethyst Hollow - Crystalline caves with amethyst clusters
  • Subterranean Mesa - Underground badlands with terracotta layers
  • Marble Mines - Calcite-rich caves with unique formations
  • Granite/Andesite/Diorite Mines - Stone variant cave systems
  • And more…
Coral Coves biome is disabled by default due to border blending issues. You can enable it by uncommenting the biome in add_substratum_cave_biomes.yml.

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Customizable Configuration

Substratum offers extensive customization through the substratum_meta.yml file:
  • Biome Distribution Scale - Control the size of cave biomes (default: 200)
  • Cave Scale - Adjust overall cave system size (default: 100)
  • Height Ranges - Configure min/max Y levels for cave generation
  • Strata Layers - Customize deepslate and bedrock layer positions

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Compatible with Existing Packs

Substratum can be used in two ways:
  1. World Installation - Generate complete underground worlds
  2. Drop-In Merge - Add Substratum caves to existing Terra packs like OverworldConfig

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Technical Details

  • Bukkit/Spigot/Paper - Full support with bukkit.yml configuration
  • Fabric - Requires level.dat editing for custom generation
Both platforms use Terra as the world generation engine.
  • Pack Version: 1.6.0
  • Author: RogueShade
  • Generator: NOISE_3D
  • Terra Addons: Uses biome-provider-pipeline-v2, chunk-generator-noise-3d, and many others
Substratum incorporates resources from:

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Known Issues

Be aware of these potential issues when using Substratum:
  • Spawn Location: Players may spawn at the top bedrock layer (Y=319) depending on world generation method
  • Spawn Suffocation: Initial spawn might occur in solid blocks - configure spawn points manually if needed
  • Coral Coves: This biome has messy borders and is disabled by default for stability

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Getting Started

Ready to explore the underground? Check out the installation guides:

Installation Overview

Learn about installation options and choose the right method for you

World Installation

Set up a complete Substratum world from scratch

Drop-In Merge

Add Substratum caves to your existing Terra pack

Cave Biomes

Explore detailed information about each cave biome

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