Changes for normal players
- Added cave biomes.
- River biomes no longer appear in oceans.
- Axolotls now spawn in underground pockets. Due to vanilla logic, they only spawn when clay is below them. Not all underground pockets will have clay in them.
- Molten rock in the core no longer spawns randomly. Instead, it's a smoother gradient.
- Fixed saplings failing to grow outside of big globe worlds.
- Fixed a lot of blocks not breaking quickly with the proper tool.
- Fixed a few blocks dropping the wrong items.
- Fixed bees not spawning in beehives in 1.20.5 and later.
Changes for data pack makers
- Layers (the chunk generator kind, not the rock layer kind) have been split up into separate files. They are no longer in the world preset.
- This makes it easier to tweak them, but also means any data pack which already did this will need to update.
- Added a "noop"-typed layer, which does nothing, and does not have any configurable properties.
- This layer type is intended for when you want to remove a layer with a data pack.
- The
molten_rockconfigured feature type has been removed. - Added new mechanism for data packs to add mob spawns to the world without replacing biomes.
- Added new weighted random switch statement for scripts.
- Added pale garden biome to the nether (MC 1.21.4 only).
- Added abandoned cities to the overworld.
- Fixed strongholds sometimes spawning in the deep dark.
- Spiders are now more likely to spawn in mineshafts and surface mineshafts.
- Endermen are now more likely to spawn in strongholds.
- Split up "data pack debugging" config option into multiple sub-options that show different information.
- Ported to MC 1.21.4.
- The pale garden biome is NOT implemented yet.
- Fixed occasional script error being shown in the chat menu and log file.
- Possibly fixed some data packs failing to load correctly.