We're now releasing the first pre-release for Minecraft 1.18.2. This pre-release introduces the possibility for data packs to customize cave generation and to add new custom structures to worlds.

If everything goes as expected, we aim to release this version on February 28th.

Happy mining!

Changes in 1.18.2 Pre-release 1

Users running Minecraft in a 32-bit environment will receive a warning in the main menu about the upcoming end of 32-bit environment support

Technical Changes in 1.18.2 Pre-release 1

The data pack version is now 9
It is now possible to add custom structures in experimental datapacks
locate and locatebiome commands now support tags (prefix with # to distinguish from normal ids)
The locate command parameter is now a configured structure rather than a structure type. For instance, you can now use /locate village_desert or /locate shipwreck_beached
A lot of the cave generation is now configurable through data packs

Configurable caves

A new registry was added for Density functions (caves are created by combining those together)
Noise settings got a new field noise_router (and lost a couple of flags), see worldgen/noise_settings folder in the worldgen report
Noise router wires data-driven parts of the cave generation with the rest of the code

Configured Structures and Structure Sets

The game now generates and stores data-driven configured structures.

Experimental datapacks can add new structure sets
The feature field in location predicates now references a configured feature
The exploration_map loot table function destination field is now a configured feature tag id
The exploration_map loot table function no longer automatically sets the display name of the map

Side effects

Some gameplay oddities have been affected by this change.

Dolphins will now more accurately pick the closest structure regardless of type
Bastion Remnant bounding boxes are now slightly more accurate to the shape of the structure

Fixed bugs in 1.18.2 Pre-release 1

MC-3524 Structure related mobs do not spawn in flat type world generation
MC-146854 Player movement favors x axis when in a corner
MC-179315 Ruined portals never generate in superflat worlds by default
MC-210612 Strongholds do not generate in certain customized worlds despite /locate saying otherwise
MC-241288 Support for custom structures has been removed
MC-244137 The option "level-seed" is not present in server.properties by default
MC-248532 Elytra firework particle spawns on the wrong hand when dual wielding fireworks

Minecraft 1.18.2 Pre-Release 1