Java Edition 23w42a

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 "title": "Minecraft 23w42a",
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 "rows": [
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 "field": "''(link to Java Edition article, displayed as Java Edition)''",
 "label": "(link to Edition article, displayed as Edition)"
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 "field": "October 18, 2023",
 "label": "Release date"
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 {
 "field": "(link to Snapshot article, displayed as Snapshot)",
 "label": "(link to Version types article, displayed as Type)"
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 {
 "field": "(link to Java Edition 1.20.3 article, displayed as 1.20.3)",
 "label": "Snapshot for"
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 "label": "(link to Obfuscation map article, displayed as Obfuscation maps)"
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 {
 "field": " <span style=\"font-size:smaller\"><abbr title=\"decimal\">dec</abbr>: </span>1073741981<br /> <span style=\"font-size:smaller\"><abbr title=\"hexadecimal\">hex</abbr>: </span>4000009D",
 "label": "(link to Protocol version article, displayed as Protocol version)"
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 "field": "3684",
 "label": "(link to Data version article, displayed as Data version)"
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 "field": "19",
 "label": "<span style=\"white-space: normal;\">(link to Pack format#List of pack formats article, displayed as Resource pack format)</span>"
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 "field": "<span class=\"plainlinks\">[https://en.wikipedia.org/wiki/Java_version_history#Java_SE_17_.28LTS.29 Java SE 17]</span>",
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 "footer": "<table style=\"margin: auto; word-break: break-word;\">\n<tr style=\"background: inherit;\">\n<td style=\"padding: 0.4em\" >[[Java Edition 1.20.2|<span style=\"margin-right:-0.35em\">◄</span>◄  1.20.2]]</td>\n<td style=\"padding: 0.4em\">'''[[Java Edition 1.20.3|1.20.3]]'''</td>\n<td style=\"padding: 0.4em\" >[[Java Edition 1.20.4| 1.20.4 <span style=\"margin-right:-0.35em\">►</span>►]]</td>\n</tr>\n<tr style=\"background: inherit;\">\n<td style=\"padding: 0.4em\">\n[[Java Edition 23w41a|◄  23w41a]]\n</td>\n<td style=\"padding: 0.4em\">''' 23w42a'''</td>\n<td style=\"padding: 0.4em\">\n[[Java Edition 23w43a| 23w43a ►]]\n</td>\n</tr>\n</table>"
}

23w42a is the third snapshot for Java Edition 1.20.3, released on October 18, 2023,^[1] which adds the "Update 1.21" experimental toggle and fixes bugs.

Experiments

• Added the "Update 1.21" experimental toggle (update_1_21 data pack).

Game rule

• Added playersNetherPortalDefaultDelay to control time (in game ticks) that a player needs to stand in a Nether portal before changing dimensions, while in Survival and Adventure mode. Defaults to 80.
• Added playersNetherPortalCreativeDelay to control time (in game ticks) that a player needs to stand in a Nether portal before changing dimensions, while in Creative mode. Defaults to 1.
• Added projectilesCanBreakBlocks, to control whether impact projectiles destroy blocks that are destructible by them (i.e. chorus flowers and decorated pots), and to control whether tridents destroys pointed dripstones. Defaults to true.

Loading screen

• Added a new screen for handling corrupted level files.
  • It gives the player the option to restore a backup, and a quick link to the bug tracker for reporting a bug about it.

Options

• Added "Hide Splash Texts" in accessibility options, which allows the splash in the main menu to be hidden.

options.txt

• Added hideSplashTexts, defaults to false.

Particles

• Added new white_smoke particle type.

Decorated pot

• Now appears in the "Redstone" tab of the Creative inventory.

Custom structure

• Changes to structure type definitions (data/minecraft/worldgen/structure):
  • Added optional pool_aliases list to jigsaw structures.
  • Aliases represent the possibility to rewire jigsaw pool connections by redirecting pool references on individual structure instances.
  • Alias variants are represented in type and is one of:
    • direct: 1:1 mapping from an alias to a new pool.
      • alias: Pool to replace.
      • target: Pool to replace with.
    • random: 1:n mapping where a pool from n is randomly selected for the structure instance.
      • alias: Pool to replace.
      • targets: Randomized list of candidate pools to replace alias with.
    • random_group
      • groups: Each group is a randomized list of above alias types.
      • Only one group is selected per structure instance.
      • This enables modelling selections such as "if pool X is replaced with X1, also replace pool Y with Y1".

Data pack

• The pack format version is now 21.
• Added white_smoke particle definition.
• Renamed field [Short] Fuse to [Short] fuse on TNT entity.

Entity format

• In NBT format for entity type tnt:
  • Added block_state.
    • This field allows replacement of rendered block model.
  • Renamed Fuse to fuse.

Raw JSON text format

• Changes to chat component serialization:
  • Components of type nbt now have source field with allowed values: entity, block, and storage.

Resource pack

• The pack format version is now 19.
• Added block model, item model and block state definitions for crafter.
• Added GUI container texture and sprites for crafter.

Tag

• Added firework_rocket into the impact_projectiles entity tag.

These additions and changes only take effect when the Update 1.21 experimental data pack is enabled.

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Crafters

• Can be crafted with five iron ingots, a crafting table, two redstone dusts, and a dropper in the crafting table.
• Can be oriented in any direction when placed.
• A pickaxe can increase the speed of mining them.
• Have a user interface similar to crafting table.
  • Have 3×3 interactable crafting grid.
  • Their crafting grid slots are toggleable, meaning that the player can change the behavior of a slot by clicking or pressing on a slot with an empty hand.
    • A toggled slot cannot hold any items and therefore cannot have items placed into it by other blocks such as hoppers and droppers.
    • A toggled slot can be toggled off by player, whether clicked directly or holding item(s), pressing slot keys associated with an empty or a not empty hotbar slot.
  • Unlike the crafting table, the slots display a preview of the crafted item which will be crafted and ejected on the next redstone pulse, but cannot be manually taken out by the player.
  • The user interface is shared between all players interacting with them, meaning that multiple players can interact with them at the same time, similar to chests and hoppers.
  • The user interface does not have a recipe book to provide help, so the player must know the recipes.
• The crafter ejects one crafted item at a time when powered by a new redstone pulse, a redstone signal that is not a continuous signal.
  • Upon receiving this new signal, crafters eject the recipe result from the front face.
  • All the result items are ejected together when the output result has multiple type of items.
• They can interact with hoppers and droppers, to input/output automatically.
  • Hoppers can be used to both insert and pull items out of them.
  • Droppers can be used to insert items into them.
  • Moving items in from another block with a hopper or a dropper prioritizes filling items into slots, by following these rules:
    • If there is a toggled slot, skipped.
    • If there is not a toggled slot, crafters prioritize the first empty slot from left-to-right and top-to-bottom.
    • If there is not a toggled slot, and there are no empty slots, crafters prioritize the smallest stack of the same item. If there are multiple possible stacks, pick the first from left-to-right and top-to-bottom.
  • If failed to select a slot, hoppers and droppers don't take any action.
• When read by a redstone comparator, the redstone signal strength is 0 to 9, where each non-empty or toggled slot adds 1 strength.

Tag

• Added crafter into mineable/pickaxe and needs_stone_tool block tags.

22 issues fixed

From released versions before 1.20

• MC-5820 – The game doesn't recognise the ISO 8601 date format.
• MC-189261 – Various Realms buttons and texts are incorrectly capitalized.
• MC-223774 – Firework Rockets can't be used to break Chorus Flowers.
• MC-225364 – Chorus flowers can be destroyed by projectiles in adventure mode.
• MC-225365 – Pointed dripstone can be destroyed by tridents in adventure mode.
• MC-232719 – The scroll bar within the singleplayer menu doesn't reset its position to the top of the list when searching for worlds.
• MC-234483 – Some strange pixels can be seen on the left side of world slot frames within several Realms menus.
• MC-237009 – Incompatible worlds don't have a tooltip in the world list.

From 1.20

• MC-262888 – Clicking "I know what I'm doing!" on the world loading screen when loading a world in a new snapshot is way too loud.

From 1.20.2

• MC-264966 – Signature is missing from Property textures appears in the logs of some Minecraft worlds due to player heads.
• MC-265515 – The "You don't seem to have a Realm" element in the realms menu cannot be selected via the mouse cursor.
• MC-265517 – The "Buy a realm!" button is automatically selected when opening the "Add Realm" interface.
• MC-265551 – "No pending invites!" tooltip in Realms is now untranslatable.

From the previous development version

• MC-265744 – Kick during login causes client error.
• MC-265745 – You can’t break decorated pots with fireworks launched from crossbow.
• MC-265751 – Decorated pot subtitles are inconsistent.
• MC-265758 – Decorated pots can be destroyed by projectiles in adventure mode.
• MC-265761 – Decorated pots are missing from the creative inventory's redstone blocks tab.
• MC-265767 – Commands don't show error messages in chat.
• MC-265773 – Functions executed as advancement rewards are executed at the top level.
• MC-265778 – /gamerule maxCommandChainLength 0 prevents subsequent command execution in the world.
• MC-265789 – Realms popup strings consist of inconsistent concluding punctuation.