Biome Creator 1.0.2: Minecraft 26.2

Biome Creator lets you discover vanilla biomes, rebuild their ecology through survival requirements, and permanently turn a selected area into the real biome.

Requirements

- Minecraft Java 26.2
- Forge 65.1.0–65.1.3
- Java 25
- Install on both client and server

1.0.2 release update

- 66 bundled vanilla biome profiles.
- Searchable biome browser and physical Biome Creator Journal.
- Real biome mutation: biome identity, vanilla colors, climate and normal spawning use the converted biome.
- Preset footprints: Small 32×32, Medium 64×64, Big 256×256, Mega 512×512 and Enormous 1024×1024.
- Experimental Custom Alignment remains opt-in and supports 4–32 Boundary Markers.
- Biome Core finalization recipe now uses a Diamond with four Gold Ingots and four Amethyst Shards.
- New Automatic Fill switch. Turn it off to change the real biome without generating terrain, water, plants, trees or mobs.
- New independent Remove Incompatible Trees switch. It can be used even with Automatic Fill off.
- Existing correct biome trees are preserved as whole trees. Confidently detected incompatible natural trees are removed atomically rather than leaf-by-leaf.
- Vanilla-grown sapling/propagule trees use biome-specific stochastic spacing and clustering instead of one shared placement rhythm.
- Ground finishing uses coherent biome surfaces and low-frequency patches rather than checkerboard replacement.
- Water is planned as contained ocean/coast/river/swamp shapes, validates its banks before carving and does not intentionally spill beyond the selected footprint.
- Characteristic wildlife is area-scaled and dispersed instead of being dropped into one pile.

Performance work

Large-area processing was rewritten for 1.0.2.

- Requirement scans share a small wall-clock budget per server tick.
- Fixed-area scans pipeline missing chunks asynchronously instead of synchronously generating one inside the scan loop.
- 1024×1024 finishing no longer builds and shuffles a duplicate list of more than one million surface-column objects.
- Large preset surfaces use lazy/indexed access and compact primitive bookkeeping.
- Tree spacing uses a local spatial index instead of comparing every new tree with every existing tree.
- Water planning is incremental rather than sorting the whole footprint before work starts.
- Big/Mega/Enormous areas skip redundant full vanilla decoration replay and use the controlled biome-aware ecology engine directly.

Large projects still do much more work than Small or Medium and can take a while, but they are designed to keep progressing over multiple ticks rather than trying to do the whole job in one giant server tick. Enormous remains marked as not recommended for low-end computers.

Area presets

- Small: 32×32
- Medium: 64×64
- Big: 256×256
- Mega: 512×512
- Enormous: 1024×1024

Validation

The final 1.0.2 production path is runtime-tested on both Forge 65.1.0 and Forge 65.1.3. Tests cover all four overwrite tiers, coherent Badlands ground, Savanna ground replacement, contained ocean generation, Warm Ocean features, dry Jungle behavior, Bamboo Jungle/mega-tree generation, existing-tree preservation, incompatible-tree cleanup, Fill Off, cleanup-only mode, Biome Core payment and protected project markers.

The profile validator covers all 66 bundled profiles and 444 criteria.

Notes

Biome Creator does not rerun structures, ores, carvers or full chunk terrain generation. Finishing operates only on the selected footprint and natural features it can safely transform.