Gaïa's Breath
ModrinthA Fabric mod that makes the natural world evolve on its own — grass spreads, flowers bloom, trees regenerate, paths form under footsteps, and burned wood can leave behind charcoal. Minecraft’s ecology becomes alive, gradual, and fully configurable.
🌿 Gaia’s Breath
A Fabric mod that makes the natural world evolve on its own.
Grass spreads, flowers sprout, trees regenerate, metal weathers, wood ages — Minecraft’s ecology becomes alive, gradual, and configurable.
🧭 Overview
The world breathes, grows, and heals over time.
Without player input, nature reclaims barren land and balances overgrowth,
creating a living landscape that changes as you explore.
Main Features
- Vegetation propagation: short grass spreads, may become tall grass, and wild flowers can appear.
- Tree renewal: saplings can pop near trees, letting forests naturally expand.
- Natural path formation: player footsteps gradually wear down grass into coarse dirt and dirt paths, which can slowly recover over time.
- Charcoal from burned wood: when wood blocks are burned by fire, they can drop charcoal instead of disappearing completely.
- Fully configurable via an in-game screen (tick budgets, growth chances, moss spread, path erosion, and more).
- Server-friendly: all updates are tick-limited and distributed across chunks to prevent lag spikes.
🌱 Natural Growth
Vegetation Propagation
- Grass blocks may receive short grass over time.
- Short grass can convert to tall grass based on probability.
- Flowers occasionally generate in suitable spots (low density, natural feel).
⚙️ Configuration (ModMenu)
Open the Gaia’s Breath configuration screen from ModMenu to fine-tune every natural mechanic.
All values are stored in config/gaiasbreath.json and can be safely edited in-game or manually.
Click to expand
🌾 World Growth
Control how vegetation spreads and evolves each tick.
| Setting | Default | Description |
|----------|----------|-------------|
| GROWTH_MAX_CHUNK_PER_TICK | 20 | Maximum number of chunks processed per tick. |
| GROWTH_BLOCKS_PER_CHUNK | 100 | Maximum number of block updates per chunk. |
| SHORT_GRASS_GROWTH_CHANCE | 0.005 | Chance for grass blocks to spawn short grass. |
| SHORT_TO_TALL_CHANCE | 0.005 | Chance for short grass to grow into tall grass. |
| FLOWER_SPREAD_CHANCE | 0.005 | Chance for flowers to appear nearby. |
| SAPLING_SPREAD_CHANCE | 0.002 | Chance for saplings to sprout near trees. |
| MUSHROOM_SPREAD_CHANCE | 0.01 | Chance for mushrooms to spread underground or in dark areas. |
| BUSH_SPREAD_CHANCE | 0.01 | Chance for berry bushes or similar foliage to propagate. |
| RAIN_GROWTH_CHANCE | 0.25 | Global growth multiplier during rain (boosts propagation speed). |
🪨 Moss Generation
Regulates how mossy blocks appear and spread on stone.
| Setting | Default | Description |
|----------|----------|-------------|
| STONE_TO_MOSSY_CHANCE | 0.02 | Chance for stone to become mossy. |
| MOSSY_SPREAD_CHANCE | 0.01 | Chance for mossy blocks to spread their texture. |
| MOSSY_TO_MOSS_CHANCE | 0.01 | Chance for mossy blocks to fully convert into moss blocks. |
| MOSS_MAX_CHUNK_PER_TICK | 10 | Maximum chunks processed for moss generation each tick. |
| MOSS_BLOCKS_PER_CHUNK | 10 | Maximum moss updates per chunk. |
| Y_RANGE | 20 | Vertical search range for nearby stone/moss blocks. |
🪵 Path & Erosion System
Tracks player movement and generates paths over time.
| Setting | Default | Description |
|----------|----------|-------------|
| STEP_TO_COARSE | 30 | Steps needed to turn grass into coarse dirt. |
| STEP_TO_PATH | 80 | Steps needed to form a dirt path. |
| RECOVERY_RATE | 1 | Rate at which paths regrow into grass per tick. |
| DECAY_INTERVAL | 1200 (1 minute) | Time between path decay checks (in ticks). |
🔥 Miscellaneous
| Setting | Default | Description |
|----------|----------|-------------|
| CHARCOAL_DROP_CHANCE | 0.5 | Chance for burned wood to drop charcoal instead of ash. |
🧩 All settings can be changed live through the config screen or by editing the JSON file.
Gaia’s Breath is designed to remain stable even with extreme or custom values — tweak it freely!
🚀 Performance
- Tick budgeted: hard caps per tick and per chunk to keep servers smooth.
- Distributed work: processing spreads across the world to avoid spikes.
- Compatible with existing worlds: no world reset required.
🧩 Compatibility
- Fabric (MC 1.21.9).
- Works in single-player and servers.
- Plays nicely with biome/terrain mods — Gaia’s Breath only performs light, probabilistic edits over time.
🗺️ Design Goals
- Keep the world feeling alive, not chaotic.
- Prioritize readability: changes should be noticeable when you return, not jarring the moment you arrive.
- Offer control to players and server owners via clear settings.
Got feedback or want different defaults?
- Email: [email protected]
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