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RZero

Return by Death. Completely rewind the timeline and the world state to your last checkpoint upon death.
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RZero Fabric 1.21.1 - 0.2

File namerzero-fabric-0.2.jar
Uploader
Reset171Reset171
Uploaded
Jul 22, 2026
Downloads
12
Size
275.9 KB
Mod Loaders
Fabric
File ID
8487522
Type
B
Beta
Supported game versions
  • 1.21.1

Curse Maven Snippet

Fabric

modImplementation "curse.maven:rzero-1615349:8487522"

Learn more about Curse Maven

What's new

RZero v0.2 Changelog

🧠 Mob AI & Determinism

  • AI Rollback Determinism: Upon repeated rollbacks to a checkpoint, villagers and mobs reproduce their movements, decisions, and paths with 100% accuracy.
  • Deterministic Spawning: Natural mob spawning is fully reproducible upon rollback.
  • POI Sorting: Point of Interest (beds, workstations) search order is strictly fixed by coordinates, eliminating random in-memory object shuffling.

🛠️ Bug Fixes & Stability

  • Nether Portal Fix: Nether portals no longer disappear during rollbacks in unloaded chunks.
  • Shoulder Parrots Fix: Parrots riding on the player's shoulders no longer disappear after a rollback.
  • Saving Optimization: Eliminated the 1-second server freeze during checkpoint creation by offloading tasks to background worker threads.

🎮 UI & Client UX

  • F5 Camera Smoothing: Fixed the camera rotation snapping/jitter when rolling back in 3rd-person view.
  • Smooth Hand Transitions: Removed the item equip/bobbing animation when switching items during rollback.
  • Inventory State Persistence: Automatically restores open inventory state upon rollback, including selected tabs in Creative mode, tabs in the Recipe Book (survival, furnaces, crafting tables), and typed text in the search bar.
  • In-Menu Hotkeys: Save and load hotkeys can now be pressed directly inside open containers and menus (automatically disabled when typing in chat or anvils).
  • Audio & Particle Clearing: Upon rollback, particles and future explosion/TNT sounds are silenced while background ambient audio continues uninterrupted.
  • Config File: Mod settings are now saved to config/rzero.json.

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