21w38a — release journal

What 21w38a changed for data packs, measured against 21w37a, the build before it. Released 2021-09-23; development build — not a release.

⚠ Entries removed

49 registry entries were removed. A pack that names one of them will fail to parse where it does.

Formats

	21w37a	21w38a
Data pack format	8.0	8.0
Resource pack format	7.0	7.0
Data version	2834	2835

Registries

38 entries added and 49 removed across 5 registries.

Registry	Change	Added	Removed
`sound_event`	changed	`block.growing_plant.crop`	—
`worldgen/block_state_provider_type`	changed	`dual_noise_provider`, `noise_provider`, `noise_threshold_provider`	`dual_noise_2d_provider`, `noise_2d_cutoff_provider`, `noise_2d_provider`
`worldgen/configured_carver`	changed	`cave_extra_underground`	`ocean_cave`, `prototype_canyon`, `prototype_cave`, `prototype_cave_extra_underground`, `underwater_canyon`, `underwater_cave`
`worldgen/configured_feature`	changed	`acacia_checked`, `birch_checked`, `dark_oak_checked`, `fancy_oak_checked`, `fossil_lower`, `fossil_upper`, `grove_vegetation`, `mega_jungle_tree_checked`, `mega_pine_checked`, `mega_spruce_checked`, `oak_checked`, `ore_andesite_lower`, `ore_andesite_upper`, `ore_coal_lower`, `ore_coal_upper`, `ore_copper_large`, `ore_diamond_large`, `ore_diorite_lower`, `ore_diorite_upper`, `ore_granite_lower`, `ore_granite_upper`, `ore_iron_middle`, `ore_iron_small`, `ore_iron_upper`, `ore_lapis_buried`, `ore_redstone_lower`, `pine_checked`, `pine_on_snow`, `spruce_checked`, `spruce_on_snow`, `underwater_magma`	`fossil`, `ore_andesite`, `ore_coal`, `ore_deepslate`, `ore_diorite`, `ore_granite`, `ore_iron`, `prototype_fossil_lower`, `prototype_fossil_upper`, `prototype_glow_lichen`, `prototype_ore_andesite_lower`, `prototype_ore_andesite_upper`, `prototype_ore_coal_lower`, `prototype_ore_coal_upper`, `prototype_ore_copper`, `prototype_ore_copper_large`, `prototype_ore_diamond`, `prototype_ore_diamond_large`, `prototype_ore_diorite_lower`, `prototype_ore_diorite_upper`, `prototype_ore_dirt`, `prototype_ore_emerald`, `prototype_ore_gold`, `prototype_ore_granite_lower`, `prototype_ore_granite_upper`, `prototype_ore_gravel`, `prototype_ore_infested`, `prototype_ore_iron_middle`, `prototype_ore_iron_small`, `prototype_ore_iron_upper`, `prototype_ore_lapis`, `prototype_ore_lapis_buried`, `prototype_ore_redstone`, `prototype_ore_redstone_lower`, `prototype_ore_tuff`, `prototype_spring_water`, `prototype_underwater_magma`, `prototype_vines`, `rare_dripstone_cluster`, `rare_small_dripstone`
`worldgen/decorator`	changed	`block_filter`, `block_survives_filter`	—

The official notes

Read the 21w38a article on minecraft.net.

That article's technical changes are grouped under these headings — open it for the detail:

Simulation distance setting
Maximum amount of background threads increased
Telemetry
World Load event

Minecraft Wiki page for 21w38a.

In the journal

← 21w37a · All builds · 21w39a →

Sources

misode/mcmeta — 21w38a summary — formats and registries, generated from the game’s own data.
minecraft.net — 21w38a — section names only.