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{{Dangerous version|Clicking on any item with the "<code>unbreakable</code>", "<code>glider</code>", or "<code>intangible_projectile</code>" data component causes the game to crash.<ref>{{Bug|Clicking on any item with the "unbreakable", "glider", or "intangible_projectile" data component causes the game to crash.|MC-303947|Fixed}}</ref>
| type = crash
| edition = java
| version = development
}}{{Infobox version
|title=Minecraft 25w45a
|group1=Obfuscated
|1-1=25w45a.jpg
|1-2=Java Edition 25w45a.png
|group2=Unobfuscated
|2-1=25w45a.jpg
|2-2=Java Edition 25w45a Unobfuscated.png
|imagesize=250px
|edition=Java
|type=Snapshot
|date=November 4, 2025
|clientdl=
'''Client''' 
{{dl|d9e25f7e65c41e8fa8c69a9f11a6d5132860af64|client|title=Obfuscated}} ({{dl|dbcb9b8dabd8144cc4814ac5bec94e73a1c82c88|json|name=25w45a}}) {{dl|26551033b7b935436f3407b85d14cac835e65640|client|title=Unobfuscated}} ({{dl|de334d80d9ddc5abb94c611b8ad10f9125c4c421|custom|name=25w45a_unobfuscated.zip|title=.zip}})<ref group="note">The contents of the [[Minecraft:w:ZIP file|ZIP file]] should be extracted to the {{File|directory|[[Minecraft:.minecraft]]/versions|inline=1}} directory in order to install this version.</ref>
|serverdl=
'''Server''' {{dl|4c0fe96ca002d7049226a740194c8d7114bd5059|server|title=Obfuscated}} {{dl|2d3568cd561daad8e80fdc605e64270ae8dd8aba|server|title=Unobfuscated}}
|clientmap=aba6c935a1e77328729ab6e8873a8ffe54af47fc
|servermap=b6f8fea06989fcc556a9ff78a4509869c54b8905
|parent=1.21.11
|prevparent=1.21.10
|prev=25w44a
|next=25w46a
|nextparent=26.1
}}
<onlyinclude>

'''25w45a''' is the fifth [[Minecraft:snapshot]] for [[Minecraft:Java Edition 1.21.11]], released on November 4, 2025, which adds a coral variant of [[Minecraft:zombie nautilus]] and a [[Minecraft:netherite]] tier of [[Minecraft:horse armor]].<ref>{{snap|25w45a|id=a|November 4, 2025}}</ref>

A separate [[Minecraft:unobfuscated version]] of 25w45a was released, titled '''25w45a Unobfuscated''' (or '''25w45a_unobfuscated''' when in the launcher). This is experimental and is aimed to aid the migration toward clients and servers being unobfuscated, which will be the only form clients and servers will have after the release of 1.21.11.<ref>{{Mcnet|removing-obfuscation-in-java-edition|Removing obfuscation in Java Edition|October 29, 2025}}</ref>

== Additions ==
=== Items ===
'''[[File:Netherite Horse Armor (item).png|32px]] [[Minecraft:Netherite horse armor]]'''
* Can be obtained by upgrading [[Minecraft:diamond horse armor]] with a [[Minecraft:smithing table]] using [[Minecraft:netherite upgrade]] template.

=== Mobs ===
'''[[File:Coral Zombie Nautilus (back).png|36px]] [[Minecraft:Coral zombie nautilus]]'''
* A new variant of the [[Minecraft:zombie nautilus]].
* Spawns in [[Minecraft:warm ocean]]s, replacing the normal zombie nautilus.

=== Gameplay ===
''' [[Minecraft:Advancement]] '''
* Added one new advancement.
{{Load advancements|Mob Kabob}}

=== General ===
'''[[Minecraft:Environment attribute]]s'''
* {{cd|minecraft:visual/sunrise_sunset_color}}
** Controls the color and intensity of the sunrise and sunset effect. If fully transparent, no sunrise or sunset will be rendered. Only visible with the overworld skybox type.
*** Value type: ARGB Color
*** Default value: <code>{{color|#00000000}}</code>
*** Modifiers: ARGB Color Modifiers
*** Interpolated: yes
*** Resolved at the camera's position.
** Only visible with the overworld skybox type.

* {{cd|minecraft:visual/sun_angle}}
** The angle in degrees of the sun, clockwise from east to west, with {{cd|0}} being directly up.
*** Value type: float, angle in degrees
*** Default value: {{cd|0.0}}
*** Modifiers: Float Modifiers
*** Interpolated: yes
*** Resolved at the camera's position.
** Only visible with the overworld skybox type.

* {{cd|minecraft:visual/moon_angle}}
** The angle in degrees of the moon, clockwise from east to west, with {{cd|0}} being directly up.
*** Value type: float, angle in degrees
*** Default value: {{cd|0.0}}
*** Modifiers: Float Modifiers
*** Interpolated: yes
*** Resolved at the camera's position.
** Only visible with the overworld skybox type.

* {{cd|minecraft:visual/star_angle}}
** The angle in degrees of the stars, clockwise from east to west, with {{cd|0}} being directly up.
*** Value type: float, angle in degrees
*** Default value: {{cd|0.0}}
*** Modifiers: Float Modifiers
*** Interpolated: yes
*** Resolved at the camera's position.
** Only visible with the overworld skybox type.

* {{cd|minecraft:visual/moon_phase}}
** The phase of the moon.
*** Value type: string id, one of:
**** {{cd|full_moon}}
**** {{cd|waning_gibbous}}
**** {{cd|third_quarter}}
**** {{cd|waning_crescent}}
**** {{cd|new_moon}}
**** {{cd|waxing_crescent}}
**** {{cd|first_quarter}}
**** {{cd|waxing_gibbous}}
*** Default value: "{{cd|full_moon}}"
*** Modifiers: override
*** Interpolated: no
*** Resolved at the camera's position.
** Only visible with the overworld skybox type.

* {{cd|minecraft:visual/star_brightness}}
** The brightness of the stars in the sky, where {{cd|0.5}} is the normal brightness during the night and {{cd|0}} is fully hidden.
*** Value type: float between {{cd|0}} and {{cd|1}}
*** Default value: {{cd|0.0}}
*** Modifiers: Float Modifiers
*** Interpolated: yes
*** Resolved at the camera's position.
** Only visible with the overworld skybox type.

* {{cd|minecraft:visual/sky_light_color}}
** The visual color of sky light. For blocks with a sky light level of 0 (or {{cd|minecraft:visual/sky_light_factor}} is {{cd|0}}), this will have no effect. This is the value passed to the <samp>lightmap.fsh</samp> shader as {{cd|SkyLightColor}}.
*** Value type: RGB Color
*** Default value: <code>{{color|#ffffff}}</code>
*** Modifiers: RGB Color Modifiers
*** Interpolated: yes
*** Resolved at the camera's position.

* {{cd|minecraft:visual/sky_light_factor}}
** The visual brightness of sky light. {{cd|minecraft:visual/sky_light_color}} is multiplied by this value. This is the value passed to the <samp>lightmap.fsh</samp> shader as {{cd|SkyFactor}}.
** The corresponding gameplay effect is controlled entirely by {{cd|minecraft:gameplay/sky_light_level}}.
*** Value type: float
*** Default value: {{cd|1.0}}
*** Modifiers: Float Modifiers
*** Interpolated: yes
*** Resolved at the camera's position.

* {{cd|minecraft:audio/firefly_bush_sounds}}
** If {{cd|true}} and not below an opaque block, [[Minecraft:firefly bushes]] will produce idle sounds.
*** Value type: boolean
*** Default value: {{cd|false}}
*** Modifiers: Boolean Modifiers
*** Interpolated: no
*** Resolved at the position of a firefly bush.

* {{cd|minecraft:gameplay/sky_light_level}}
** The effective light level of the sky used by mechanics such as mob spawning or [[Minecraft:daylight detector]]s.
*** For example, a block fully exposed to the sky will be considered to have a light level of exactly this value, while a block deep in a cave will not be affected at all.
** The corresponding visual effect is controlled entirely by {{cd|minecraft:visual/sky_light_factor}}.
*** Value type: float
*** Default value: {{cd|15.0}}
*** Modifiers: Float Modifiers
*** Interpolated: yes
*** Resolved for a whole dimension (cannot be specified on a Biome)

* {{cd|minecraft:gameplay/eyeblossom_open}}
** If {{cd|true}}, [[Minecraft:closed eyeblossom]]s will eventually open by random block ticks. If {{cd|false}}, [[Minecraft:open eyeblossom]]s will do the opposite. If "{{cd|default}}", open or Closed closed will remain in their current state.
*** Value type: one of:
**** {{cd|true}}
**** {{cd|false}}
**** "{{cd|default}}"
*** Default value: "{{cd|default}}"
*** Modifiers: override
*** Interpolated: no
*** Resolved at the eyeblossom block's position

* {{cd|minecraft:gameplay/turtle_egg_hatch_chance}}
** The chance that a [[Minecraft:turtle egg]] block will switch to its next hatching state when randomly ticked.
*** Value type: float between {{cd|0}} and {{cd|1}}
*** Default value: {{cd|0.0}}
*** Modifiers: Float Modifiers
*** Interpolated: yes
*** Resolved at the turtle egg block's position.

* {{cd|minecraft:gameplay/creaking_active}}
** While {{cd|true}}, [[Minecraft:creaking heart]] blocks (and their corresponding Creaking) will become active. On the other hand, when {{cd|false}}, it will enter its dormant state.
*** Value type: boolean
*** Default value: {{cd|false}}
*** Modifiers: Boolean Modifiers
*** Interpolated: no
*** Resolved at the creaking heart block's position.

* {{cd|minecraft:gameplay/surface_slime_spawn_chance}}
** An additional chance rolled when a natural [[Minecraft:slime]] spawn attempt occurs in a biome with the {{cd|#allows_surface_slime_spawns}} tag.
*** Value type: float between {{cd|0}} and {{cd|1}}
*** Default value: {{cd|0.0}}
*** Modifiers: Float Modifiers
*** Interpolated: yes
*** Resolved at the position of the slime spawn attempt.

* {{cd|minecraft:gameplay/cat_waking_up_gift_chance}}
** The chance that a [[Minecraft:cat]] lying on its owner's [[Minecraft:bed]] will drop a gift (from the {{cd|gameplay/cat_morning_gift}} loot table) when the player wakes up.
*** Value type: float
*** Default value: {{cd|0.0}}
*** Modifiers: Float Modifiers
*** Interpolated: yes
*** Resolved at the cat's position.

* {{cd|minecraft:gameplay/bees_stay_in_hive}}
** When true, [[Minecraft:bee]]s will try to navigate to their hives and will not exit unless the hive is broken or next to a fire.
*** Value type: boolean
*** Default value: {{cd|false}}
*** Modifiers: Boolean Modifiers
*** Interpolated: no
*** Resolved at a bee or bee hive block's position.

* {{cd|minecraft:gameplay/monsters_burn}}
** When {{cd|true}}, monsters will burn while exposed to the sky.
*** Value type: boolean
*** Default value: {{cd|false}}
*** Modifiers: Boolean Modifiers
*** Interpolated: no
*** Resolved at the monster's position.

* {{cd|minecraft:gameplay/can_pillager_patrol_spawn}}
** When {{cd|true}}, [[Minecraft:pillager patrol]]s are able to spawn.
*** Note: the global skylight level must also be greater than 11.
*** Value type: boolean
*** Default value: {{cd|true}}
*** Modifiers: Boolean Modifiers
*** Interpolated: no
*** Resolved at the position of the patrol spawn attempt.
*** Replaces the {{cd|#without_patrol_spawns}} biome tag.

* {{cd|minecraft:gameplay/villager_activity}}
** Controls the default AI activity for adult [[Minecraft:villager]]s.
** Not all activities are supported by villager AI – if an unsupported one is chosen, the Villager will do nothing. The following activities are supported:
*** {{cd|core}}
*** {{cd|hide}}
*** {{cd|idle}}
*** {{cd|meet}}
*** {{cd|panic}}
*** {{cd|pre_raid}}
*** {{cd|raid}}
*** {{cd|rest}}
*** {{cd|work}}
*** Value type: Mob Activity
*** Default value: "{{cd|minecraft:idle}}"
*** Modifiers: override
*** Interpolated: no
*** Resolved at the villager's position.

* {{cd|minecraft:gameplay/baby_villager_activity}}
** Controls the default AI activity for baby villagers.
** Not all activities are supported by villager AI; if an unsupported one is chosen, the villager will do nothing. The following activities are supported:
*** {{cd|core}}
*** {{cd|hide}}
*** {{cd|idle}}
*** {{cd|meet}}
*** {{cd|panic}}
*** {{cd|play}}
*** {{cd|pre_raid}}
*** {{cd|raid}}
*** {{cd|rest}}
*** Value type: Mob Activity
*** Default value: "{{cd|minecraft:idle}}"
*** Modifiers: override
*** Interpolated: no
*** Resolved at the villager's position.

'''[[Minecraft:Tag]]s'''
* Biome Tags
** Added {{cd|#spawns_coral_variant_zombie_nautilus}}
*** Contains the biomes where the coral variant of the [[Minecraft:zombie nautilus]] can spawn.

* Timeline Tags
** Added {{cd|#universal}}
*** Contains timelines that are active in every dimension.
** Added {{cd|#in_overworld}}
*** Contains timelines that are active in the [[Minecraft:Overworld]].
** Added {{cd|#in_nether}}
*** Contains timelines that are active in the [[Minecraft:Nether]].
** Added {{cd|#in_end}}
*** Contains timelines that are active in the [[Minecraft:End]].

'''[[Minecraft:Timeline]]s'''
* Are a new experimental concept defined in data packs under the timeline registry (i.e. found under <samp>data/<''namespace''>/timeline/<''id''>.json</samp>).
* Specify game behavior based on the absolute day time (that which is set by {{cmd|time set}}). Timelines optionally can specify a period over which they will be repeated.
* Are able to modify game behavior or visuals by acting as an Environment Attribute source to apply Environment Attribute modifiers.
** Format: object with fields
*** {{cd|period_ticks}}: optional integer, defines the duration in ticks over which the timeline will repeat.
**** If not specified, the timeline will not repeat
*** {{cd|tracks}}: optional map between Environment Attribute IDs and a corresponding Environment Attribute Track object.
* Timelines by default have no effect unless they are included by a dimension.
* With the inclusion of Timelines, Environment Attribute sources are processed in the following order (from low to high priority):
** Dimensions
** Biomes
** Timelines
** Weather (not data-driven)
* Interpolation
** Timelines can define Attribute Tracks
*** These specify how a modifier for a particular Environment Attribute changes over time by defining keyframes.
*** Depending on the attribute, interpolation may be used between each keyframe. If interpolation is not used, the previous keyframe value will always be selected.
** For example, a Timeline with a period of 24000 might be set up as following:
*** At time = {{cd|0}}, the timeline provides {{cd|sky_color {{=}} #ff0000}} (red)
*** At time = {{cd|1000}}, the timeline provides {{cd|sky_color {{=}} #ff0000}} (red)
*** At time = {{cd|6000}}, the timeline provides {{cd|sky_color {{=}} #ff00ff}} (magenta)
** Between time = {{cd|0}} and time = {{cd|1000}}, the sky color will be red. Between {{cd|1000}} and {{cd|6000}}, it will shift from red to magenta. Then, from {{cd|6000}} all the way until the timeline repeats and reaches time = {{cd|0}} again, the color will slowly shift back to red.
** Unlike biomes, if a Timeline uses a modifier instead of an override, interpolation is applied to the modifier arguments rather than the final modified values.
* Attribute Tracks
** An Attribute Track specified within a Timeline takes the format of an object with the following fields:
*** {{cd|ease}} – optional Easing Type (see below), used to ease the interpolaton of the value between keyframes.
**** Default: linear
***** If the target attribute does not support interpolation, the easing mode will have no effect.
*** {{cd|keyframes}} – list of keyframe objects, must be ordered by the ticks field:
**** {{cd|ticks}} – integer between 0 and period_ticks (if specified), defines the tick (within the period) at which this keyframe's value will be active.
**** {{cd|value}} – the modifier argument (format dependent on the chosen modifier).
***** If no modifier is specified (or override is used), the type of this field is the same as the Environment Attribute itself.
***** How this value is used depends on the type of modifier.
****** Note: at most two keyframes can be placed on the same tick, creating an immediate transition.
*** {{cd|modifier}} – optional string modifier ID, dependent on the Attribute Type (see the Common Modifiers section below).
**** Default: override
** For example, the following Timeline has a period of {{cd|24000}}, and has an attribute track that modifies only {{cd|minecraft:gameplay/cat_waking_up_gift_chance}}. Because the easing is constant, between tick {{cd|362}} and {{cd|23667}} the value is {{cd|0.0}}, while between tick {{cd|23667}} and {{cd|362}} it is {{cd|0.7}}.
** Like other Environment Attribute sources, the specified value is used as the argument to the specified {{cd|modifier}}. This is then applied on top of sources with a lower priority. In this case the modifier is {{cd|maximum}}, so this timeline will only ever increase the value of {{cd|cat_waking_up_gift_chance}} to the value specified in the track.

<syntaxhighlight lang="JSON">
{
"period_ticks": 24000,
"tracks": {
"minecraft:gameplay/cat_waking_up_gift_chance": {
"ease": "constant",
"modifier": "maximum",
"keyframes": [
{ "ticks": 362, "value": 0.0 },
{ "ticks": 23667, "value": 0.7 }
]
}
}
}
</syntaxhighlight>

* Easing Types
** Easing Types control the interpolation between two keyframes by applying a curve. The following built-in Easing Types are provided:
*** {{cd|constant}} – always selects the previous keyframe
*** {{cd|linear}}
*** {{cd|in_back}}
*** {{cd|in_bounce}}
*** {{cd|in_circ}}
*** {{cd|in_cubic}}
*** {{cd|in_elastic}}
*** {{cd|in_expo}}
*** {{cd|in_quad}}
*** {{cd|in_quart}}
*** {{cd|in_quint}}
*** {{cd|in_sine}}
*** {{cd|in_out_back}}
*** {{cd|in_out_bounce}}
*** {{cd|in_out_circ}}
*** {{cd|in_out_cubic}}
*** {{cd|in_out_elastic}}
*** {{cd|in_out_expo}}
*** {{cd|in_out_quad}}
*** {{cd|in_out_quart}}
*** {{cd|in_out_quint}}
*** {{cd|in_out_sine}}
*** {{cd|out_back}}
*** {{cd|out_bounce}}
*** {{cd|out_circ}}
*** {{cd|out_cubic}}
*** {{cd|out_elastic}}
*** {{cd|out_expo}}
*** {{cd|out_quad}}
*** {{cd|out_quart}}
*** {{cd|out_quint}}
*** {{cd|out_sine}}
** An Easing Type may also be specified with a Cubic Bézier in the format: {{cd|{ "cubic_bezier": [ x1, y1, x2, y2 ] }}}
*** {{cd|x1}}: float between {{cd|0}} and {{cd|1}}, x-coordinate of the first control point.
*** {{cd|y1}}: float, y-coordinate of the first control point.
*** {{cd|x2}}: float between {{cd|0}} and {{cd|1}}, x-coordinate of the second control point.
*** {{cd|y2}}: float, y-coordinate of the second control point.

* Common Data Types
** Mob Activity
*** A string ID from the minecraft:activity built-in registry. One of:
**** {{cd|minecraft:core}}
**** {{cd|minecraft:idle}}
**** {{cd|minecraft:work}}
**** {{cd|minecraft:play}}
**** {{cd|minecraft:rest}}
**** {{cd|minecraft:meet}}
**** {{cd|minecraft:panic}}
**** {{cd|minecraft:raid}}
**** {{cd|minecraft:pre_raid}}
**** {{cd|minecraft:hide}}
**** {{cd|minecraft:fight}}
**** {{cd|minecraft:celebrate}}
**** {{cd|minecraft:admire_item}}
**** {{cd|minecraft:avoid}}
**** {{cd|minecraft:ride}}
**** {{cd|minecraft:play_dead}}
**** {{cd|minecraft:long_jump}}
**** {{cd|minecraft:ram}}
**** {{cd|minecraft:tongue}}
**** {{cd|minecraft:swim}}
**** {{cd|minecraft:lay_spawn}}
**** {{cd|minecraft:sniff}}
**** {{cd|minecraft:investigate}}
**** {{cd|minecraft:roar}}
**** {{cd|minecraft:emerge}}
**** {{cd|minecraft:dig}}

* Modifiers
** Added {{cd|blend_to_gray}} RGB/ARGB modifier – modifies a color by taking its grayscale form, applying a brightness modifier, and mixing with this using some factor.
*** Where {{cd|gray {{=}} brightness * (0.3 * red + 0.59 * green + 0.11 * blue), result {{=}} lerp(factor, subject, [gray, gray, gray])}}
**** Argument format: object with fields
**** {{cd|brightness}}: float between {{cd|0}} and {{cd|1}}, a multiplier to apply to the grayscale value.
**** {{cd|factor}}: float between {{cd|0}} and {{cd|1}}, the factor to mix with.

== Changes ==
=== Items ===
{{Animate|Wooden Spear.png;Stone Spear.png;Copper Spear.png;Iron Spear.png;Golden Spear.png;Diamond Spear.png;Netherite Spear.png|32px}} '''[[Minecraft:Spear]]'''
* The margin hitbox for charge attacks on all spears have been changed from <code>0.25</code> to <code>0.125</code>.{{source code ref|Before: <code>"hitbox_margin": 0.25,</code> After: <code>"hitbox_margin": 0.125,</code>}}

=== Mobs ===
'''[[Minecraft:Camel husk]]'''
* Drops 2–3 [[Minecraft:rotten flesh]] when killed, now with an extra 0–1 for each level of [[Minecraft:Looting]].

'''[[Minecraft:Zombie horse]]''', '''[[Minecraft:camel husk]]''', '''[[Minecraft:zombie nautilus]]''' and '''[[Minecraft:nautilus]]'''
* Now become [[Minecraft:persistent]] with any interaction from a player, not just riding them.

=== General ===
'''[[Minecraft:Advancement trigger]]'''
* Added new {{cd|spear_mobs}} trigger with fields:
** {{cd|player}}: optional entity predicate, the player using the kinetic weapon.
** {{cd|count}}: optional integer, the number of mobs hit in a single use of the kinetic weapon.

'''[[Minecraft:Data component format]]'''
* {{cd|minecraft:piercing_weapon}} and {{cd|minecraft:kinetic_weapon}} data components now have bounds on their reach parameters:
** {{cd|min_reach}}: is now valid from {{cd|0.0}} to {{cd|128.0}}
** {{cd|max_reach}}: is now valid from {{cd|0.0}} to {{cd|128.0}}
** {{cd|hitbox_margin}}: is now valid from {{cd|0.0}} to {{cd|1.0}}

'''[[Minecraft:Data pack]]'''
* The [[Minecraft:pack format]] version is now {{cd|93.0}}.

'''[[Minecraft:Dimension type]]s'''
* Added a new optional {{cd|timelines}} field that specifies which Timelines are active in this dimension.
** Format: a Timeline ID, a list of Timeline IDs, or a Timeline Tag.
* The {{cd|natural}} field has been fully replaced by the {{cd|minecraft:gameplay/eyeblossom_open}} and {{cd|minecraft:gameplay/creaking_active}} environment attributes.
* The {{cd|effects}} field has been removed and replaced with the following new fields:
** {{cd|skybox}} – the skybox rendering type to use, one of:
*** {{cd|none}} (was {{cd|minecraft:nether}} effect ID)
*** {{cd|overworld}} (was {{cd|minecraft:overworld}} effect ID)
**** Following environment attributes are applied only when the {{cd|skybox}} is {{cd|overworld}}:
***** {{cd|minecraft:visual/sky_color}}, {{cd|minecraft:visual/sun_angle}},{{cd|minecraft:visual/sunrise_sunset_color}}, {{cd|minecraft:visual/moon_phase}}, {{cd|minecraft:visual/moon_angle}}, {{cd|minecraft:visual/star_angle}}, {{cd|minecraft:visual/star_brightness}}
*** {{cd|end}} (was {{cd|minecraft:end}} effect ID)
*** Default: {{cd|overworld}}
** {{cd|cardinal_light}} – the direction of cardinal lighting that affects blocks, one of:
*** {{cd|default}} (was {{cd|minecraft:overworld}} and {{cd|minecraft:end}} effect ID).
*** {{cd|nether}} (was {{cd|minecraft:nether}} effect ID).
*** Default: {{cd|default}}
* The {{cd|fixed_time}} field has been replaced by a {{cd|has_fixed_time}} boolean (default: {{cd|false}})
** Time-based effects such as the angle of the sun are now specified instead by environment attributes.
** However, the remainder of behaviors formerly affected by {{cd|fixed_time}} being present will now instead use the {{cd|has_fixed_time}} boolean.

'''[[Minecraft:Game rules]]'''
* The limit for the <code>minecraft:max_entity_cramming</code> game rule has been changed to a minimum of 0.

'''[[Minecraft:Mob variant definitions]]'''
* Zombie Nautilus Variants
** Zombie Nautilus variants can be data-driven by adding entries to <samp>data/<namespace>/zombie_nautilus_variant/<id>.json</samp>
*** This feature is experimental.
*** Fields in file:
**** {{cd|model}} – one of: normal, warm
**** {{cd|asset_id}} – namespaced id for this variant asset, resolves to <samp>assets/<namespace>/textures/<path>.png</samp>
**** {{cd|spawn_conditions}} – a uniform variant selection rule.
** Spawn conditions
*** {{cd|minecraft:biome}}
**** Checks if entity is spawning in specific biomes.
**** Fields:
***** {{cd|biomes}} – single entry, list or a tag describing biomes.
*** {{cd|minecraft:moon_brightness}}
**** Checks if current moon brightness is within certain range.
**** Fields:
***** range – floating point range (a single number or an object like {{cd|{"min": 1, "max": 2})}}
*** {{cd|minecraft:structures}}
**** Checks if entity is spawning in specific structures.
**** Fields:
***** {{cd|structures}} – single entry, list or a tag describing structures.

'''[[Minecraft:Panorama]]'''
* Updated the panorama to resemble [[Minecraft:Mounts of Mayhem]].

'''Performance'''
* Video memory impact of anisotropic filtering was reduced, but still remains quite high.

'''[[Minecraft:Resource pack]]'''
* The version is now {{cd|73.0}}.

'''[[Minecraft:Sky]]'''
* The color of the sky during sunrises and sunsets is now affected by rain and thunder.

'''[[Minecraft:Tag]]s'''
* Biome Tags
** Removed {{cd|#without_patrol_spawns}} – replaced by {{cd|gameplay/can_pillager_patrol_spawn}} environment attributes.

'''[[Minecraft:Texture atlas]]'''
* Item textures were split out of the blocks atlas into a separate new items atlas that does not have mipmaps.
** All textures used in an item model have to come from the same (items or blocks) atlas.
** All textures used in a block model have to come from the blocks atlas.
** Commands that were referencing the blocks atlas for item textures now need to reference the items atlas instead.

== Fixes ==
{{fixes|fixedin=25w45a
|;From released versions before 1.21
|199467|Certain entity animations stop after they've existed in world for too long.
|245895|View Bobbing stops working after long elytra flight.
|269295|Jump bar progress renders unused pixels from dynamic texture atlas.
|271729|Armadillo scute drops are not affected by the {{cd|mob_drops}} game rule.
|;From 1.21
|271938|Mace smash attack can push players in creative mode that are flying.
|;From 1.21.9
|301424|{{cd|entity_data}} item component detection is broken in resource packs.
|302184|Copper golems in cave/void air never turn into statues.
|302469|Creepers at the player's exact position with an explosion radius of 0 set the player's velocity to NaN.
|302477|Loot tables stopped supporting SNBT as entity data.
|;From 1.21.10
|303799|There is no 'Search...' text in the search field in the world selection screen.
|303891|Untamed zombie horses and skeleton horses cannot have saddles placed on their saddle slot using {{cmd|item}}.
|;dev
|302659|Items such as grass blocks and cacti have incorrect textures in inventories when mipmap levels are enabled.
|302663|Any form of attacking non-player entities always produces the “weak attack” sound instead of the appropriate sound.
|302703|Spear can dismount invulnerable, non-living, and otherwise inanimate passengers from any vehicle.
|302887|Spear charging animation in first person isn’t perfectly mirrored between the main hand and off hand.
|302911|If the sun texture cannot be loaded, the moon texture is reused instead.
|303067|Players can charge with the spear and deal damage while dying.
|303108|Inventory items are now mipmapped, making them look very blurry.
|303109|Tick freeze and memory spikes with long {{cd|piercing_weapon}} ray reach.
|303226|Music doesn't restart after exiting a pale garden.
|303292|Cloud movement is jittery when the world's gametime value is large.
|303402|Hover events on text posted in the chat take effect even when in a GUI.
|303405|You can attack entities diagonally through solid blocks using spears.
|303413|Scrolling text does not get clipped properly in UI elements.
|303427|The lunge enchantment doesn’t work in creative mode if you have 6 or less hunger points.
|303510|Dropping a spear while charging slows down the player.
|303554|{{cd|minecraft:piercing_weapon}} component causes attack cooldown damage penalty to be ignored.
|;prev
|303654|Closed captions of parched show as strays.
|303656|Placing blocks in empty chunk sections inside loaded chunks shows the chunk fade animation.
|303658|Block textures are blurry on some systems, depending on mipmap and anisotropic filtering settings.
|303659|Elements within the language menu are not selected in order when using the TAB key.
|303671|Camel husks can despawn when wearing a saddle.
|303674|The hand animation plays when right clicking on a camel husk or zombie horse ridden by another mob with a lead.
|303677|Camel husks can despawn when attached to a lead.
|303680|Untamed zombie horses can despawn when attached to a lead.
|303681|Untamed zombie nautiluses can despawn when attached to a lead.
|303703|Entities and block entities are not affected by the chunk fade-in effect.
|303704|Statistics are no longer saved if the folder they would save into doesn't exist yet.
|303705|Entity cramming can no longer be disabled.
|303714|The jump bar's progress sprite is improperly scaled.
|303727|Short effect names can cause the effect duration to appear outside the effect box.
|303734|{{cd|deprecated.json}} renames translation keys to nonexistent keys.
|303744|Ender pearls can launch players in the direction they are thrown.
|303746|Spear attacks can hurt entities through doors.
|303802|Spamming right click and shift when getting into boat gives a speed boost.
}}</onlyinclude>

== Videos ==
{{slicedlime|JBhZriLnIFs|AdzhN1oPYR0}}

== Notes ==
{{notelist}}

== References ==
{{reflist}}
{{source code ref list}}

== Navigation ==
{{Navbox Java Edition versions|1.2x}}

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