A climate-driven worldgen mod for Minecraft 1.20.1 & 1.21.x (Fabric)
by Peetsa (Julia)
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Current Release: v1.2.5 · Status: 🔬 Under Construction— Climate Authority Reset Planning
████████████████████ v1.3 ongoing refinements pre-release (Almost ready!!)
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The updated Atlas Viewer used during development — a custom desktop tool for visually detecting and inspecting biomes across the full world map. The biome presence panel (right) shows coverage percentages for all 50 known biomes, making it easy to get a big-picture overview of global distribution at a glance.
The v1.2.x series laid the groundwork — it built the core latitude-band system and proved the concept works. v1.3 — the "Cohesion Update" — is nearly done for MC 1.21.11, with a release targeting 26.1 and ports to earlier versions after that. The first half of 1.3 has been about fixing structural problems under the hood of the climate system. The second half is about making everything feel right — smoother transitions between zones, more natural-looking boundaries, and a world that reads as one cohesive place instead of a stack of climate layers. Biome balance has been a constant game of whack-a-mole, which is a big part of why 1.3 has taken longer than I originally planned. I'd rather get it right than rush it out — I want players to experience the world the way it's meant to feel. The overarching goal has been to break away from the visible horizontal bands of earlier versions and move toward world generation that feels genuinely planet-like.