Minecraft 26.1 Snapshot 11 Technical Changes for Hosts

Mojang released a new testing build on 3 March 2026. Packed with model refactors, economy tweaks, and formatting increments, minecraft 26.1 snapshot 11 targets technical polish across Java Edition before upcoming release drops. It follows previous testing cycles such as Minecraft 26.1 snapshot 10 by advancing technical versions while refining block and entity behavior.

Data Pack 100 and World Generation Overhauls

Data packs update to version 100 in this snapshot, bringing specific adjustments to world generation features, tags, and entity properties.

Rule-Based State Providers and Tags

Block state providers introduce rule_based_state_provider. Previously treated as a separate parsing mechanism reserved for disk features, Mojang integrated it as a standard sub-type usable within any feature configuration. It takes an optional fallback block state provider and a list of rules. Each rule pairs an if_true block predicate with a then block state provider, checking block positions before serving a state.

Alongside this, world generation gains the #prevents_nearby_leaf_decay block tag. This tag designates which blocks will prevent leaves from decaying when located within a taxicab distance of 6 blocks.

Loot Tables and Village Trades

Name Tags no longer appear in chests within Ancient Cities or Woodland Mansions. Instead, trading dynamics absorb the item:

• Wandering Traders now stock Name Tags for one Emerald.
• Master Librarians no longer sell Name Tags, offering Yellow Candles and Red Candles for three Emeralds instead.

Block State Defaults and Timeline Attributes

Default block states for Banners and Signs now use a rotation property value of 8 rather than 0. Mojang notes this aligns default placement orientation with blocks like Dispensers or Skulls when executed without defined properties in commands like /setblock.

For testing scenarios, Game Test Environments now support timeline_attributes definitions, allowing developers to set a defined list of timelines via the timelines field.

Resource Pack 83 and Item Model Restructuring

Resource packs step up to version 83, focusing heavily on model transformations and modular block models.

Sub-Model Transformations

The item model format allows transformations on individual sub-models. Model types including minecraft:model, minecraft:special, minecraft:range_dispatch, minecraft:composite, minecraft:select, and minecraft:condition gain transformation fields. These use the identical matrix or decomposed translation, scale, and rotation structure found on display entities. Transformations apply after item display settings and compose through child types, excluding minecraft:bundle/selected_item.

Special Model Types

Several block models handled by minecraft:special have been separated into modular properties:

• minecraft:bed renders only half the bed (configured with part set to head or foot), requiring a minecraft:composite model to display both halves.
• minecraft:banner and minecraft:standing_sign add an attachment field accepting ground or wall.
• minecraft:hanging_sign accepts wall, ceiling, or ceiling_middle for attachment.
• minecraft:chest adds chest_type accepting single, left, or right.
• minecraft:shulker_box removes the orientation field.
• New special types minecraft:bell (rendering animated bell parts) and minecraft:book (handling Enchanting Table and Lectern book angles via open_angle, page1, and page2) are now accessible.

In addition, sound files receive updates: Trumpet Note Block sounds have new audio assets, and pigs introduce custom eating events (entity.pig.eat, entity.baby_pig.eat, entity.pig_big.eat, and entity.pig_mini.eat) accompanied by the data pack field eat_sound.

What This Breaks for Server Hosts

Upgrading a testing instance to this build requires immediate attention to custom content:

• Packs require version bumps: Data packs must target version 100, and resource packs must target 83. Pack files declaring older numbers will flag compatibility warnings.
• Command scripts using default rotation: Any automation relying on parameterless /setblock for Signs and Banners will face south-west (rotation 8) rather than south (rotation 0).
• Custom models using special renderers: Custom resource packs defining beds, chests, signs, or shulker boxes via minecraft:special will fail or display incomplete models unless updated to provide newly mandatory fields like part or chest_type.
• Fullscreen minimization bug: Mojang identified a known issue where minimizing the client while in fullscreen mode prevents maximizing the window again.

Administrators managing production environments on the Minecraft Server List or checking dedicated Minecraft 26.1 servers should test these changes in staging before applying them to live communities.

What Players Will Notice on Servers

For regular players, the clearest differences show up in trades, audio, and visual consistency:

• Villager economy shifts: Players seeking Name Tags must locate a Wandering Trader instead of leveling up a Librarian, while Librarians provide coloured candles.
• Mob visuals and audio: Pigs now emit chewing sounds when fed. Baby Goats visibly rotate their heads while ramming, baby Hoglins display their mane on both sides, and baby Panda head textures have been cleaned up.
• Block displays: Enchanting Tables rendered inside Block Display entities or held by Endermen show a closed book resting on top, while special blocks like Skulls, Banners, and Chests correctly align with world rotation properties.