Hi everyone! We're back with yet another snapshot for 1.20.5, which includes a collection of technical changes, bug fixes and a new experimental feature for Trial Chambers, the Vault Block!

We're very interested in hearing your feedback on this new feature over at the feedback site: Let's talk about Vaults!

Happy looting!

Technical Changes

The Data Pack version is now 30
The Resource Pack version is now 25
Added a reserved region file compression id for third-party servers to use for custom compression implementations
Added an option to not compress region files
Allowed server operators to view dedicated server TPS debug chart

Region file compression algorithm

Added a third value to the dedicated server configuration property region-file-compression:
- none does not compress the data. Consumes significantly more space and requires significant time to read and write, even though CPU is used less. Might make sense together with filesystem level compression

Reserved compression id for third-party servers

Compression id 127 can now be used for custom implementations of region file compression
When used, the version id must be followed by a namespaced string representing the custom algorithm used

Data Pack Version 30

Potion effects stored in items or entities will no longer encode their default values
- amplifier: 0
- duration: 0
- ambient: false
- show_particles: true
Added body_armor_item and body_armor_drop_chance to all entities that currently have HandItems and ArmorItems, and handle the same way as HandItems and ArmorItems
Handling of Horses ArmorItem, Llamas DecorItem, and Wolf's armor has been changed to use body_armod_item and body_armor_drop_chance instead
In commands, removed horse.armor slot argument, and added instead armor.body slot argument, applicable now to all mobs
Added vault_connection particle
Added Vault block with a variety of NBT elements which can be configured for custom content
- config
  - loot_table The loot table that will be ejected upon being unlocked
    - Default value: "minecraft:chests/trial_chambers/reward"
  - activation_range The range any player who hasn't unlocked the Vault must be within for it to open its keyhole
    - Default value: 4
  - deactivation_range The range all viable players must be outside of for the Vault to close its keyhole
    - Default value: 4.5
  - key_item An itemstack that is required to unlock the Vault
    - NBT and stack count is used for comparison
    - Default value: "minecraft:trial_key"
  - override_loot_table_to_display An optional loot table which will be used for displaying items inside the cage instead of results from the config's loot_table
    - Default value: No value
- shared_data
  - connected_particles_range The range players who have not unlocked the Vault must be within before particles will flow from them
    - Default value: 4.5

Resource Pack Version 25

The unused attributes array in core shader definitions has been removed
The unused position_color_normal and position_tex_lightmap_color shaders have been removed
The position_tex_color_normal shader (only used by clouds) has been replaced by rendertype_clouds
The IViewRotMat uniform has been removed, and the Position attribute for entities is now in (camera relative) world space
Light direction uniforms are no longer premultiplied by the view matrix
Added texture and model files for Vault block
Changed texture for the Trial Key item
Added texture and particle file for vault_connection particle

Experimental Features

Added Vault block

Vault

A block that holds locked treasure and loot - find the right key to eject its rewards
- Found throughout Trial Chambers, containing the structures' most valuable loot
- Vaults in Trial Chambers require a Trial Key to be unlocked
Can be unlocked by an unlimited amount of players
- After a player has unlocked a Vault, they cannot unlock that Vault again
- If a player has not unlocked that Vault before, an orange stream of particles will flow from the player to the Vault when nearby
Has a keyhole that will be open or closed depending on the players nearby
- If any nearby player has not unlocked that Vault, the keyhole will be open
- If all nearby players have unlocked that Vault, the keyhole will be closed
Within its cage, it will cycle through and display items which are possible to eject from its loot table
The rewards it ejects are randomized from its loot table each time it is unlocked
Cannot be crafted or obtained in Survival, and does not drop anything when mined
Explosion-resistant and cannot be moved
Vaults currently reuse the same loot table that reward chests previously used in the Trial Chambers
- This loot table is temporary and will be completely revised as development continues

Trial Key

Updated texture to reflect new Vault visuals

Fixed bugs in Snapshot 24w05a

MC-225170 Normal matrix scaling broken in some situations
MC-260099 Sniffer's snout shading changes during sniffing
MC-264821 The fog on armor worn by entities occurs too early
MC-267922 Wolf armor loses custom display name and other NBT when equipped

Minecraft Snapshot 24w05a