Java Edition 1.21.5 Pre-Release 1
Minecraft 1.21.5 Pre-Release 1
| Edition | |||||||
|---|---|---|---|---|---|---|---|
| Release date |
March 11, 2025 | ||||||
| Type | |||||||
| Pre-release for | |||||||
| Downloads | |||||||
| Obfuscation maps | |||||||
| Protocol version |
dec: 1073742063 | ||||||
| Data version |
4320 | ||||||
| Resource pack format |
55 | ||||||
| Data pack format |
70 | ||||||
| Minimum Java version | |||||||
| |||||||
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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 1.21.4|<span style=\"margin-right:-0.35em\">◄</span>◄ 1.21.4]]</td>\n<td style=\"padding: 0.4em\">'''[[Java Edition 1.21.5|1.21.5]]'''</td>\n<td style=\"padding: 0.4em\" ></td>\n</tr>\n<tr style=\"background: inherit;\">\n<td style=\"padding: 0.4em\">\n[[Java Edition 25w10a|◄ 25w10a]]\n</td>\n<td style=\"padding: 0.4em\">''' 1.21.5 Pre-Release 1'''</td>\n<td style=\"padding: 0.4em\">\n[[Java Edition 1.21.5 Pre-release 2| 1.21.5 Pre-release 2 ►]]\n</td>\n</tr>\n</table>"
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1.21.5 Pre-Release 1 (known as 1.21.5-pre1 in the launcher) is the first pre-release for Java Edition 1.21.5, released on March 11, 2025.[1] This is the first pre-release released in 2025.
Changes
Items
- Added textures for Programmer Art resource pack.
World generation
- The longer versions of fallen birch trees now generate properly.
- This version is up to 15 blocks long, as opposed to the shorter version which can only reach 8 blocks at most.
Command format
General
- Arguments in commands that accept inline values like loot tables, predicates, modifiers, data components, formatted text (
/loot,/give,/tellraw,/execute if predicate, data components in/execute if items, etc.) have been reverted to accept numbers in place of booleans.
General
Network protocol
- The client-bound
player_chatpacket now contains an index increasing for every message sent to the client.- The index starts at 0 when logging in (or is reset by configuration phase and the
loginpacket). - For every message, the server should increment this value by 1.
- If this value updates in an unexpected way, the client will disconnect.
- As the protocol requires that every chat packet reaches the client in produced order, the goal is to enable faster detection of missed/reordered chat messages for custom server developers.
- The index starts at 0 when logging in (or is reset by configuration phase and the
- The server-bound
chatandchat_command_signedpackets now contain a checksum byte along with the 'last seen' update.- This is a simple hash of the 'last seen' signatures which should be reconstructed by the server, allowing quicker detection of desynchronized state.
- This can be passed as
0to disable the check, for compatibility with protocol translation.
- The version is now
55. - Tweaked leaf litter block models.
Fixes
From released versions before 1.21
- MC-170134 – Minecraft uses several times more VRAM than needed after exploring terrain for a while.
From the 1.21.5 development versions
- MC-279350 – Leaf litter multipart model system is unoptimized, causing render lag.
- MC-280141 – Baby farm animals from spawn eggs with a variant differing from the parent flash the wrong variant initially.
- MC-280241 – Cold Cows have improperly mirrored and incorrectly aligned ear textures.
- MC-280249 – Spawn eggs don't use their old textures with the Programmer Art resource pack enabled.
- MC-280278 – Sheep wool uses 1.14 texture with Programmer Art resource pack enabled.
- MC-280326 – When teleporting across dimensions an error is often thrown.
- MC-280361 – When a fallen tree replaces the bottom half of tall vegetation, the top part of the vegetation still generates.
From the previous development version
- MC-280474 – TNT minecarts explode regardless of
tntExplodesgamerule. - MC-280477 – TNT still explodes when summoned or dispensed while
tntExplodesgamerule is false. - MC-280479 – TNT is completely deleted when attempting to ignite it using redstone pulses when the "
tntExplodes" gamerule is disabled. - MC-280480 – No flint and steel clicking sound when attempting to ignite. TNT with a flint and steel when the "
tntExplodes" gamerule is disabled. - MC-280493 – If the
tntExplodesgame rule is changed to false while primed TNT already exists in the world, the primed TNT explodes as normal. - MC-280501 – The "Fire extinguishes" sound plays every game tick while on fire in rain.
- MC-280520 –
ItemDropChanceon an item frame is not serialized when there is no item anymore, leading to inconsistencies.
Video
Video made by Slicedlime:
References
- ↑ "Minecraft 1.21.5 Pre-Release 1" – Minecraft.net, March 11, 2025.
