1.18 Pre-release 1 — release journal

What 1.18-pre1 changed for data packs, measured against 21w44a, the build before it. Released 2021-11-11; development build — not a release.

⚠ Breaking for data packs

This build removed 1 registry. Any file that referenced them stops loading.

Formats

	21w44a	1.18-pre1
Data pack format	8.0	8.0
Resource pack format	8.0	8.0
Data version	2845	2847

Registries

280 entries added and 144 removed across 9 registries.

Registry	Change	Added	Removed
`worldgen/decorator`	registry removed	—	`block_filter`, `carving_mask`, `cave_surface`, `chance`, `count`, `count_extra`, `count_multilayer`, `count_noise`, `count_noise_biased`, `dark_oak_tree`, `decorated`, `end_gateway`, `environment_scan`, `heightmap`, `iceberg`, `lava_lake`, `nope`, `range`, `scatter`, `square`, `surface_relative_threshold`, `water_depth_threshold`
`worldgen/placed_feature`	new registry	`acacia_checked`, `amethyst_geode`, `bamboo`, `bamboo_light`, `bamboo_vegetation`, `basalt_blobs`, `basalt_pillar`, `birch_bees_0002`, `birch_bees_002`, `birch_checked`, `birch_tall`, `blackstone_blobs`, `blue_ice`, `brown_mushroom_nether`, `brown_mushroom_normal`, `brown_mushroom_old_growth`, `brown_mushroom_swamp`, `brown_mushroom_taiga`, `cave_vines`, `chorus_plant`, `classic_vines_cave_feature`, `crimson_forest_vegetation`, `crimson_fungi`, `dark_forest_vegetation`, `dark_oak_checked`, `delta`, `desert_well`, `disk_clay`, `disk_gravel`, `disk_sand`, `dripstone_cluster`, `end_gateway_return`, `end_island_decorated`, `end_spike`, `fancy_oak_bees`, `fancy_oak_bees_0002`, `fancy_oak_bees_002`, `fancy_oak_checked`, `flower_default`, `flower_flower_forest`, `flower_forest_flowers`, `flower_meadow`, `flower_plain`, `flower_swamp`, `flower_warm`, `forest_flowers`, `forest_rock`, `fossil_lower`, `fossil_upper`, `freeze_top_layer`, `glow_lichen`, `glowstone`, `glowstone_extra`, `grass_bonemeal`, `ice_patch`, `ice_spike`, `iceberg_blue`, `iceberg_packed`, `jungle_bush`, `jungle_tree` and 146 more	—
`worldgen/placement_modifier_type`	new registry	`biome`, `block_predicate_filter`, `carving_mask`, `count`, `count_on_every_layer`, `environment_scan`, `height_range`, `heightmap`, `in_square`, `noise_based_count`, `noise_threshold_count`, `random_offset`, `rarity_filter`, `surface_relative_threshold_filter`, `surface_water_depth_filter`	—
`advancement`	changed	`adventure/fall_from_world_height`, `adventure/play_jukebox_in_meadows`, `nether/ride_strider_in_overworld_lava`	`adventure/caves_and_cliffs`, `adventure/ride_strider_in_overworld_lava`, `husbandry/play_jukebox_in_meadows`
`block_predicate_type`	changed	`inside_world_bounds`, `solid`	—
`height_provider_type`	changed	`weighted_list`	—
`worldgen/configured_feature`	changed	`bamboo_no_podzol`, `bamboo_some_podzol`, `crimson_forest_vegetation_bonemeal`, `crimson_fungus`, `crimson_fungus_planted`, `end_gateway_return`, `flower_flower_forest`, `forest_flowers`, `fossil_coal`, `fossil_diamonds`, `kelp`, `large_basalt_columns_temp`, `mushroom_island_vegetation`, `nether_sprouts_bonemeal`, `ore_ancient_debris_large`, `ore_ancient_debris_small`, `ore_andesite`, `ore_coal`, `ore_coal_buried`, `ore_copper_small`, `ore_diamond_small`, `ore_diorite`, `ore_gold_buried`, `ore_granite`, `ore_iron`, `ore_nether_gold`, `ore_quartz`, `patch_grass`, `patch_waterlily`, `rooted_azalea_tree`, `seagrass_mid`, `seagrass_short`, `seagrass_slightly_less_short`, `seagrass_tall`, `single_piece_of_grass`, `spring_lava_nether`, `spring_lava_overworld`, `spring_nether_closed`, `spring_nether_open`, `trees_birch_and_oak`, `trees_flower_forest`, `trees_grove`, `trees_old_growth_pine_taiga`, `trees_old_growth_spruce_taiga`, `trees_plains`, `trees_sparse_jungle`, `trees_taiga`, `trees_windswept_hills`, `twisting_vines_bonemeal`, `warped_forest_vegetation_bonemeal`, `warped_fungus`, `warped_fungus_planted`	`acacia_checked`, `bamboo`, `bamboo_light`, `birch_checked`, `birch_other`, `brown_mushroom_giant`, `brown_mushroom_nether`, `brown_mushroom_normal`, `brown_mushroom_swamp`, `brown_mushroom_taiga`, `cave_vines`, `classic_vines_cave_feature`, `crimson_fungi`, `crimson_fungi_planted`, `dark_oak_checked`, `end_gateway`, `end_island_decorated`, `fancy_oak_checked`, `flower_forest`, `flower_plain_decorated`, `flower_warm`, `forest_flower_trees`, `forest_flower_vegetation`, `forest_flower_vegetation_common`, `fossil_lower`, `fossil_upper`, `glowstone`, `grove_vegetation`, `kelp_cold`, `kelp_warm`, `large_basalt_columns`, `lush_caves_ceiling_vegetation`, `lush_caves_vegetation`, `mega_jungle_tree_checked`, `mega_pine_checked`, `mega_spruce_checked`, `monster_room_deep`, `mushroom_field_vegetation`, `oak_checked`, `ore_andesite_lower`, `ore_andesite_upper`, `ore_coal_lower`, `ore_coal_upper`, `ore_copper`, `ore_debris_large`, `ore_debris_small`, `ore_diamond`, `ore_diorite_lower`, `ore_diorite_upper`, `ore_gold_deltas`, `ore_gold_extra`, `ore_gold_lower`, `ore_gold_nether`, `ore_granite_lower`, `ore_granite_upper`, `ore_iron_middle`, `ore_iron_upper`, `ore_quartz_deltas`, `ore_quartz_nether`, `ore_redstone_lower` and 56 more
`worldgen/feature`	changed	—	`decorated`
`worldgen/noise`	changed	`surface_secondary`	`offset_large`, `ridge_large`

The official notes

Read the 1.18 Pre-release 1 article on minecraft.net.

The article has no technical-changes section — it lists bug fixes only, or predates that heading.

Minecraft Wiki page for 1.18-pre1.

In the journal

← 21w44a · All builds · 1.18-pre2 →

Sources

misode/mcmeta — 1.18-pre1 summary — formats and registries, generated from the game’s own data.
minecraft.net — 1.18 Pre-release 1 — section names only.