Arona Layers Generator

A Fabric mod for Minecraft 1.20.1 that automatically generates terrain layer blocks during worldgen using ReTerraForged terrain data or vanilla heightmap analysis.

Features

• Worldgen Integration: Layers are placed during chunk generation — no commands, no post-processing
• ReTerraForged Support: Uses RTF's height cell data for realistic, gradient-based layer depth distribution
• Dual Backend Support: Works with Conquest Reforged or VanillaLayerPlus for the actual layer blocks
• Plant Handling: Vanilla plants above layers are handled automatically per backend
  • Conquest Reforged: converts plants to CR equivalents
  • VanillaLayerPlus: shifts plants one block up (VP handles visual offset)
• Underwater Support: Optional waterlogged layers on ocean and river floors
• Structure Awareness: Optionally skips layer placement inside structure bounding boxes
• Configurable: JSON-based configuration in config/aronalayersgen/

Requirements

• Minecraft 1.20.1
• Fabric Loader 0.15.11+
• Fabric API 0.92.2+
• One of the following layer mods:
  • Conquest Reforged
  • VanillaLayerPlus
• Strongly recommended: ReTerraForged for best results

Installation

1. Install Fabric Loader 0.15.11+ for Minecraft 1.20.1
2. Install Fabric API 0.92.2+
3. Install Conquest Reforged or VanillaLayerPlus
4. Optionally install ReTerraForged
5. Place this mod's JAR in your mods folder
6. Launch the game once to generate the config file at config/aronalayersgen/layer_config.json

Configuration

All settings live in config/aronalayersgen/layer_config.json.

Core Settings

Key	Default	Description
rtf_layer_injection	false	Enable RTF-based layer generation (requires ReTerraForged)
layer_injection	false	Enable vanilla heightmap-based layer generation
injection_mode	CARVERS	When to inject: CARVERS (before features) or POST_FEATURES (after structures)
skip_snowy_biomes	true	Skip layer placement in cold/snowy biomes
improve_snowy_biomes	false	Use vanilla snow layers in snowy biomes instead of skipping
underwater_layers	false	Place waterlogged layers on underwater surfaces

Plant & Decoration Settings

Key	Default	Description
plant_injection	false	Handle vanilla plants above layer blocks
replace_sea_grass	false	Include seagrass/tall seagrass in plant handling
tree_injection	false	Allow trees to grow through layer blocks
place_rocks	false	Place CR rock blocks above layers (CR only)
place_extra_foliage	false	Place CR foliage above layers (CR only)

Structure Settings

Key	Default	Description
structure_injection	false	Skip layers inside structure bounding boxes
structure_cleanup	false	Remove layers under opaque structure blocks post-generation
structure_no_layers	false	Remove layers where structures modified the heightmap
enclosed_space_check	false	Skip layers in enclosed spaces (caves, buildings)

Block Mapping Files

Located in config/aronalayersgen/ (created on first run) or bundled as defaults:

• vp_block_mappings.json: Vanilla block → VanillaLayerPlus layer block mappings (VLP only)
• cr_block_mappings.json: Vanilla block → Conquest Reforged layer block mappings (CR only)
• cr_plant_mappings.json: Vanilla plant → CR plant mappings (CR only)
• cr_rock_mappings.json: Surface block → CR rock block mappings (CR only)
• cr_extra_foliage_mappings.json: Surface block → CR extra foliage mappings (CR only)

The active block mapping file is chosen automatically based on which layer mod is installed.

Building from Source

./gradlew build

The compiled JAR will be in build/libs/.

License

MIT License

Author

Arona74