Java Edition 23w45a

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 "title": "Minecraft 23w45a",
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 "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)",
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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>1073741986<br /> <span style=\"font-size:smaller\"><abbr title=\"hexadecimal\">hex</abbr>: </span>400000A2",
 "label": "(link to Protocol version article, displayed as Protocol version)"
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 "label": "(link to Data version article, displayed as Data version)"
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 "field": "21",
 "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 23w44a|◄  23w44a]]\n</td>\n<td style=\"padding: 0.4em\">''' 23w45a'''</td>\n<td style=\"padding: 0.4em\">\n[[Java Edition 23w46a| 23w46a ►]]\n</td>\n</tr>\n</table>"
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23w45a is the seventh snapshot for Java Edition 1.20.3, released on November 8, 2023,^[1] which adds trial chambers, trial spawner, trial key, and the breeze under experimental features, and fixes bugs.

Particles

• Added gust, gust_dust, and trial_spawner_detection particle types.

Jigsaw block

• Increased maximum value of structure variable size from 7 to 20.

Monster spawner

• Now renders their inner faces when looking inside.

Data pack

• The pack format version is now 24.

Processor list

• Added trial_chambers_copper_bulb_degradation.

Resource pack

• The pack format version is now 21.
• uniform font has been updated to use Unifont 15.1.04 (from 15.0.06).
  • During the updates of Unifont, glyphs of CJK unified ideographs in CJK Unified Ideographs Extension I were added.^[2]
• The only supported texture format is now .png.

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

👁 Image
Trial spawner

• A block similar to monster spawners that ejects rewards upon completion and can have variable levels of challenge in multiplayer.
• The challenge level increases for each new player a trial spawner notices nearby.
  • Challenge level doesn't decrease until it is reset during a trial spawner's cooldown.
• Unlike normal spawners, a trial spawner spawns a limited number of mobs proportional to its current challenge level.
  • It can only spawn a mob at positions that are within line of sight.
  • It can spawn a mob regardless of any light level requirement the mob has.
  • Spawned mobs are persistent and don't despawn.
• Once all mobs are defeated, the trial spawner ejects a set of rewards proportional to the current challenge level.
  • After the rewards have been ejected, the trial spawner goes into cooldown for 30 minutes during which it no longer spawns mobs.
• Can't be crafted nor obtained by players in Survival - instead, they can be found naturally placed throughout trial chambers.
• Extremely slow to mine and resistant to explosions, and don't drop even with Silk Touch.
• When placed in Creative, trial spawners have no mob type set by default.
  • The mob type can be set by interacting with it while holding a spawn egg.
• Creative and Spectator players cannot be detected or noticed by trial spawners.

Spawn eggs

• 👁 Image
  Breeze spawn egg

👁 Image
Trial key

• An item that can only be obtained from trial spawners.
• Currently doesn't have any functionality.

👁 Image
Breeze

• The breeze is a cunning, hostile mob that can spawn via trial spawner in some rooms within the trial chambers.
• Has 30HP👁 ❤️
  × 15 health points.
• Cannot be hit by arrows or tridents.
• The breeze moves primarily by leaping around the target, sometimes jumping quite long distances.
• An aggressive adversary, the breeze shoots volatile wind energy in the form of wind charge projectiles at its target.
• Wind charges deal a small amount of damage when colliding directly with an entity.
• After colliding with an entity or a block, wind charge projectiles produce a wind burst, which knocks back entities in the area by several blocks.
• Wind bursts also have the effect of 'activating' certain blocks:
  • Non-iron doors and trapdoors are flipped.
  • Fence gates are flipped.
  • Buttons are pressed.
  • Levers are flipped.
  • Bells are rung and swung.
  • Lit candles (both standalone and on cake) are extinguished.
• Wind bursts do not have any effect on iron doors, iron trapdoors, or any block being held in its position by a redstone signal.
• Currently does not drop any loot.

👁 Image
Wind charge

• Fired by the breeze.
• Explodes upon impact, emitting a large burst of plume particles and knocking entities back similar to a TNT explosion.
• Its explosion interacts with certain blocks, including buttons and trapdoors.
• Deals damage when colliding directly with a player or mob.
• Can be deflected, just like fireballs.

👁 Image
Trial chambers

• A new structure in the Overworld where players can explore and take on combat challenges during the mid-game.
  • Made out of a variety of copper and tuff blocks and can be found in different sizes from large to small.
  • Relatively common throughout the deepslate layer of the underground, with the starting piece generating at a height between -40 and -20.
• The layout of each trial chamber is procedurally generated, and can include traps, supply and reward chests, decorated pots, and a variety of combat spaces.
  • Traps include dispensers containing different potential items, such as arrows or fire charges.
  • Supply chests can be found between the different rooms, and give the player blocks and items which help them navigate their trials.
  • Reward chests are guarded by challenges in each room, and can be a source of many high level enchanted books and equipment.
  • Decorated pots found in hallways can contain supplies such as iron or arrows. Some pots are decorated and others are blank.
  • The loot found in reward chests and decorated pots are still being iterated, and are absolutely not final as well as the loot from defeating mobs from a trial spawner.
• Each trial chamber can include trial spawners from three categories:
  • Melee: zombie, husk or slime.
  • Small melee: spider, cave spider, baby zombie or silverfish.
  • Ranged: skeleton, stray, or skeleton with arrows of Poison.
• Each trial spawner category only uses one mob for the entire structure when generated, and these mobs are randomized for each trial chamber.
  • For example, one trial chamber might only spawn zombies, cave spiders and strays, while another might only spawn slimes, silverfish and skeletons.
  • The exceptions to this are some trial spawners in unique rooms which always spawn breezes.
• Regular mob spawning does not happen inside the bounding boxes of the trial chamber pieces.

Tags

• Added following damage type tag:
  • #breeze_immune_to: contains arrow and trident.
• Added following entity type tags:
  • #deflects_arrows: contains breeze.
  • #deflects_tridents: contains breeze.
• Added following biome tag:
  • #has_structure/trial_chambers: contains #is_overworld.

Copper grates

• Now prevent mob spawning on top of them.
• No longer suffocate mobs who end up with their head inside them.

Resource pack

• Added entity models and textures for experimental breeze mob:
  • breeze, wind_charge.
• Added shader:
  • breeze_wind.

Tags

• Added breeze into #fall_damage_immune entity type tag.

19 issues fixed

From released versions before 1.20

• MC-131646 – Drowned spawners only work in biomes where drowned spawn.
• MC-136904 – /execute store score does not store 0 when subcommand is advancement and fails.
• MC-169969 – The back faces of spawners do not render.
• MC-177446 – RootVehicle tag in playerdata entry is not upgraded.
• MC-186797 – Functioning clock and compasses in crafting output slot.
• MC-255244 – NBT link/reference when using /fill.

From 1.20.2

• MC-266256 – Accessibility button in the Welcome screen still needs its own string.

From the 1.20.3 development versions

• MC-265702 – Text components in commands accept malformed JSON.
• MC-265747 – Punching a TNT Minecart in creative mode drops the minecart.
• MC-265875 – Compasses, Clocks and Recovery Compasses work normally within the output slot of the crafter.
• MC-266054 – Side Water texture on Copper bulbs.
• MC-266056 – Mobs suffocate inside most copper grate block variants.
• MC-266063 – Copper Doors and Trapdoors make generic metal sounds when placing.
• MC-266090 – Light can pass through copper bulbs.
• MC-266091 – Copper Bulbs do not cull faces correctly.
• MC-266096 – Mobs can spawn on oxidized or waxed copper grates.
• MC-266248 – No error message when granting/revoking an advancement that is already granted/revoked.

From the previous development version

• MC-266287 – Can't load .dat, and .nbt (server list & saved hotbar).
• MC-266289 – Could not save data raids.dat, and random_sequences.dat.

• This snapshot is one of only three snapshots for Java Edition to have its digits consecutively increasing by one. The only other snapshots to have this property are 12w34a and 12w34b. As there can only be 53 weeks in a year, and because the snapshot format changed beginning with 26.1 Snapshot 1, this is also the final one.