Compatibility
Minecraft: Java Edition
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Supported environments
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Details
Memento – Natural Renewal
Intentional world renewal through remembering and forgetting.
Long-running Minecraft worlds slowly become museums of their own past. Old terrain piles up. Distant generation gets more interesting than home. Resetting the world feels drastic.
Memento offers another way.
It helps existing worlds evolve safely over time — without wiping them, without forcing change, and without disrupting players.
Nothing happens near active players. Nothing is forced. Nothing runs automatically.
The system is conservative, explainable, and server-friendly.
When this mod is useful
Memento is especially helpful for:
- Old worlds created in earlier Minecraft versions
- Over-mined regions that should reset deliberately
- Changed world-generation mods, where new terrain should appear closer to home
Instead of pushing players farther outward, the world itself can make room — carefully and under your control.
If you run a long-lived server and want it to feel alive again without wiping it, this mod was built for you.
How it works (in short)
Memento combines two complementary renewal paths:
- Natural Renewal — gradual region-level pruning of forgotten land
- Stone-driven renewal — explicit chunk-level renewal and protection using stones
Both are conservative. Both are explainable. Both require operator action to execute.
Memento analyzes region files directly instead of loading thousands of chunks in-game. This keeps server impact low — even on very large worlds.
Renewal only happens when:
- The area is inactive
- No players are nearby
- Chunks unload naturally
- You explicitly trigger renewal
If nothing happens, the system tells you why.
Quick Start
You do not need to memorize command options. Auto-completion guides you once you know the basic flow.
1️⃣ Allow renewal in an area (Witherstone)
Stand where renewal should be allowed:
/memento add witherstone mystone
This marks the surrounding area as allowed to renew once it becomes inactive.
You can adjust maturity later if needed:
/memento alter witherstone mystone daysToMaturity 0
Useful for testing.
2️⃣ Protect important places (Lorestone)
/memento add lorestone mybase
Prevents renewal inside that area.
Remove it later with:
/memento remove lorestone mybase
Protection always wins.
3️⃣ Check system state
/memento explain
Shows a summary of the system state.
For more detail:
/memento explain world
/memento explain stones
/memento explain renewal
The system clearly explains:
- Which stones are active
- What the world scan knows
- Which areas are renewal candidates
- Why renewal is currently blocked (if it is)
You are never guessing what the mod is doing.
4️⃣ Visualize the area of effect
/memento visualize mystone
Shows temporary particle effects marking the exact area influenced by the stone.
Use this to:
- Confirm placement
- See the radius clearly
- Demonstrate boundaries to players
Visualization does not change terrain — it simply shows influence.
5️⃣ Scan the world (Natural Renewal)
/memento do scan
Scans region files directly and builds an updated world memory projection.
Active scan is single-pass and conservative. Unresolved files are reported clearly and can be reconciled by rerunning the command.
Even large worlds remain responsive during scanning.
6️⃣ See renewal candidates
/memento explain renewal
Shows current renewal candidates based on the latest world memory snapshot.
This does not modify the world. It explains whether renewal would occur at:
- Region level (entire region pruned), or
- Chunk level (selected chunks renewed)
If nothing is ready, the system explains why.
7️⃣ Execute renewal
⚠️ Although Memento is conservative and carefully designed, you should create a backup of your world before manually triggering renewal.
/memento do renew
Optionally limit the number of actions:
/memento do renew 5
This submits renewal actions based on the current renewal candidates.
Depending on eligibility, renewal may apply at region level or chunk level.
Renewal only completes once affected chunks unload naturally. No forced unloads occur. No renewal happens near active players.
Only one pruning operation runs at a time.
What to expect
- Renewal is not immediate
- Nothing changes while players are nearby
- No mass chunk loading during analysis
- The server remains authoritative
- If nothing happens, the system explains why
Memento is intentionally cautious — because your world matters.
Safety & Compatibility
- Server-side only
- Vanilla clients compatible
- No forced chunk unloads
- No partial regeneration
- Compatible with world-generation mods
Documentation & Feedback
This page covers the core workflow. More detailed documentation — including additional commands and deeper explanations — is available on GitHub.
If you try Memento:
- Tell us what worked
- Tell us what felt unclear
- Suggest improvements
- Or just say hello
You can open issues or share feedback directly on GitHub. Constructive feedback helps shape the future of the mod.
Memento – Natural Renewal Let the world move forward — while preserving what matters.