{{Infobox version |title=Minecraft 21w40a |image=21w40a.jpg |image2=Java Edition 21w40a.png |edition=Java |type=Snapshot |date=October 7, 2021 |jsonhash=bcc36c0cf4cb0c8e9d6b34a62376ad7485556fe1 |clienthash=b88eecb40a4b522aaebe5b10dc44d235f2aef944 |clientmap=3d8e14cfa4589def945e615dfc3f8f4ede71d31c |serverhash=84496ec4beeeae34a448b99f3e3d890066f6807f |servermap=6b5b0e3ab19b97cfd0df9743e3b0205dbd8ebe20 |parent=1.18 |prevparent=1.17.1 |prev=21w39a |next=21w41a |nextparent=1.18 }} '''21w40a''' is the fourth [[snapshot]] for [[Java Edition 1.18]], released on October 7, 2021,{{snap|21w40a|October 7, 2021}} that merges and renames some [[biome]]s, tweaks world generation, mob spawning, and fixes bugs. == Changes == === Blocks === ; [[Copper ore]] * Now drop 2-5 [[raw copper]] when mining instead of 2-3. ; [[Stonecutter]] * [[Block of copper]] can be converted to 4 [[cut copper]] using stonecutter. === Mobs === ; [[Axolotl]]s * Now only spawn in water above [[clay]] blocks in [[lush caves]]. ; [[Cod]], [[salmon]], [[pufferfish]], [[tropical fish]], [[squid]], and [[dolphin]]s * Now only spawn in water from Y=50 to Y=64. * Additionally, tropical fishes now also spawn in lush caves at any height. ; [[Glow squid]]s * Now only spawn in water blocks under Y=30. ; [[Goat]]s * No longer spawn in [[stony peaks]]. ; [[Zombie]]s * Now also spawn in [[dripstone caves]] again. === World generation === ; Biomes * The unused height variation sub-biomes have been removed from the code and merged with their default biome variants, as following: :{| class="wikitable collapsible collapsed" ! Removed biomes |- | {{BiomeLink|Badlands Plateau}} |- | {{BiomeLink|Bamboo Jungle Hills}} |- | {{BiomeLink|Birch Forest Hills}} |- | {{BiomeLink|Dark Forest Hills}} |- | {{BiomeLink|Desert Hills}} |- | {{BiomeLink|Desert Lakes}} |- | {{BiomeLink|Giant Spruce Taiga Hills}} |- | {{BiomeLink|Giant Tree Taiga Hills}} |- | {{BiomeLink|id=Modified Gravelly Mountains|Gravelly Mountains+}} |- | {{BiomeLink|Jungle Hills}} |- | {{BiomeLink|Modified Badlands Plateau}} |- | {{BiomeLink|Modified Jungle}} |- | {{BiomeLink|Modified Jungle Edge}} |- | {{BiomeLink|Modified Wooded Badlands Plateau}} |- | {{BiomeLink|Mountain Edge}} |- | {{BiomeLink|Mushroom Field Shore}} |- | {{BiomeLink|Shattered Savanna Plateau}} |- | {{BiomeLink|Snowy Mountains}} |- | {{BiomeLink|Snowy Taiga Hills}} |- | {{BiomeLink|Snowy Taiga Mountains}} |- | {{BiomeLink|Swamp Hills}} |- | {{BiomeLink|Taiga Hills}} |- | {{BiomeLink|Taiga Mountains}} |- | {{BiomeLink|Tall Birch Hills}} |- | {{BiomeLink|Wooded Hills}} |} * Some biomes have been renamed: :{| class="wikitable collapsible collapsed" ! Old name !! New name |- | Mountains || {{BiomeLink|Windswept Hills}} |- | Giant Spruce Taiga || {{BiomeLink|Old Growth Spruce Taiga}} |- | Giant Tree Taiga || {{BiomeLink|Old Growth Pine Taiga}} |- | Gravelly Hills || {{BiomeLink|Windswept Gravelly Hills}} |- | Jungle Edge || {{BiomeLink|Sparse Jungle}} |- | Lofty Peaks || {{BiomeLink|Jagged Peaks}} |- | Shattered Savanna || {{BiomeLink|Windswept Savanna}} |- | Snowcapped Peaks || {{BiomeLink|Frozen Peaks}} |- | Snowy Tundra || {{BiomeLink|Snowy Plains}} |- | Stone Shore || {{BiomeLink|Stony Shore}} |- | Tall Birch Forest || {{BiomeLink|Old Growth Birch Forest}} |- | Wooded Badlands Plateau || {{BiomeLink|Wooded Badlands}} |- | Wooded Mountains || {{BiomeLink|Windswept Forest}} |} * Non-cave biomes (e.g. [[savanna]]s) no longer change with height. * Tweaked the relative size of some biomes, to match 1.17 a bit closer. * Increased the average size of most biomes. [[File:21w40a approximate ore distribution.jpg|thumb|450px|Ore distribution changes.]] ; [[Ore]] distribution * [[Copper ore]] now generates between Y=-16 and Y=112, generating the most at Y=48, and increased the number of [[ore blob]]s. * Added more unexposed [[diamond]]s. * Decreased minimum generation height of [[emerald ore]] from Y=32 to Y=-16, and increased the number of blobs. ** This allows deepslate emerald ore to generate again. * Extra gold generates below Y=-48. * Decreased minimum generation height of the upper range of [[iron ore]] from Y=112 to Y=80, and increased the number of blobs. ; [[Monster room]]s * Increased the amount of monster rooms, especially below Y=0. ; [[Gravel]] * Now generates below Y=0, and increased the number of blobs. ; [[Lake]]s * Water lakes were removed, because [[aquifer]]s could provide local water levels. ; [[Magma block]]s * Slightly increased the frequency of underwater magma. ; [[Village]]s * Now slightly more spread out. ; General * [[Bedrock]] layers generate dependent on the world seed now. === Gameplay === ; [[Advancement]]s * Due to the removal or merging of sub-biomes, the number of biomes required to visit for the "Adventuring Time" advancement has been reduced from 42 to 31, with the following biomes now being required: :{| class="wikitable collapsed collapsible" ! Required biomes |- | {{BiomeLink|Badlands}} |- | {{BiomeLink|Bamboo Jungle}} |- | {{BiomeLink|Beach}} |- | {{BiomeLink|Birch Forest}} |- | {{BiomeLink|Cold Ocean}} |- | {{BiomeLink|Dark Forest}} |- | {{BiomeLink|Deep Cold Ocean}} |- | {{BiomeLink|Deep Frozen Ocean}} |- | {{BiomeLink|Deep Lukewarm Ocean}} |- | {{BiomeLink|Desert}} |- | {{BiomeLink|Forest}} |- | {{BiomeLink|Frozen River}} |- | {{BiomeLink|Jungle}} |- | {{BiomeLink|Lukewarm Ocean}} |- | {{BiomeLink|Mushroom Fields}} |- | {{BiomeLink|Old Growth Pine Taiga}} |- | {{BiomeLink|Plains}} |- | {{BiomeLink|River}} |- | {{BiomeLink|Savanna}} |- | {{BiomeLink|Savanna Plateau}} |- | {{BiomeLink|Snowy Beach}} |- | {{BiomeLink|Snowy Taiga}} |- | {{BiomeLink|Snowy Plains}} |- | {{BiomeLink|Sparse Jungle}} |- | {{BiomeLink|Stony Shore}} |- | {{BiomeLink|Swamp}} |- | {{BiomeLink|Taiga}} |- | {{BiomeLink|Warm Ocean}} |- | {{BiomeLink|Windswept Forest}} |- | {{BiomeLink|Windswept Hills}} |- | {{BiomeLink|Wooded Badlands}} |} === General === ; AI * Optimized AI for axolotls, goats, [[hoglin]]s, [[zoglin]]s, [[piglin]]s, [[piglin brute]]s and [[villager]]s. == Fixes == {{fixes|fixedin=21w40a |;old |128770|Woodland mansions still generate in dark forest hills. |132306|Snowy grass without snow near lakes in snowy biome. |133582|Dolphins try to catch up with boat on land. |137140|Llamas cannot spawn in shattered savanna plateau. |137956|Lakes still generate in superflat preset "Overworld" after removing its tag. |138734|Spawn point for seed 0, world type Buffet with badlands plateau biome is under surface, ⇒ player dies. |138782|Stranded dolphin tries to catch the boat on the water and stops beating. |138939|Fish and dolphins spawn in water above sea level. |152966|Increase in villages generating in versions after 1.10. |169523|As of 18w06a, the sand, clay and gravel blocks no longer generate around small lakes. |177016|Some lakes in frozen biomes generate unfrozen. |190724|Spawning in solid blocks in single biome "Badlands Plateau" world. |197688|Mountain edge never generates. |200640|Despite being a coastal biome, mushroom field shores don't have a warm/unique water color. |200803|Gravelly mountains+/modified gravelly mountains placed incorrectly in the biome selection. |217906|Large amounts of axolotls cause performance issues. |224494|Regular dirt can generate naturally on the surface near pools. |225030|Dungeons are extremely rare compared to in the past. |225506|Grass blocks can generate naturally in underground pools. |225842|Flowers can generate on large plants near lakes. |225858|Seeds and flowers appear in ponds. |226000|Pointed dripstone items in underground pools. |226437|Water lakes generating in snowy tundra's can sometimes contain dark spots. |226682|World can fail to render/load causing visual issues. |227064|Floating grass can still generate above water lakes. |229365|Large amounts of goats cause performance issues. |231400|Modified badlands plateau and mountain edge don't generate and gives out invalid biome data in single biome worlds. |233661|In some cases, sand blocks generating over lakes do not cause light updates, resulting in large dark spots. |238006|Emerald ore and infested blocks do not generate in snowy mountain biomes. |;dev |236609|New mountain biomes use translations strings in biome selection. |236614|Adventuring Time advancement still accepts non generating biomes. |236617|Mountains and gravelly mountains use their 1.17.1 biome ID name. |236632|Banners without patterns do not render properly. |236663|Command blocks do not display command in their UI. |236736|No relief on treasure map or explorer maps. |236894|Foliage from specific biomes can generate in biomes they aren't meant for. |236896|Strange mini broken aquifer walls generating commonly on the surface. |237490|The bottom parts of aquifers aren't always surrounded by blocks which can occasionally cause them to spill into caves in ways that appear bizarre. |237586|Entities that die outside of simulation distance remain frozen in the death animation. |237666|Unused biomes still present in game files. |;previous |237925|Opening world from 1.12.2 (or older) in latest snapshot regenerates random chunks. |237933|Sweet berries generate much too often. |237950|Cave vines can generate without tip because prioritize_tip option is negated. |237951|Cave vines can generate into water. |237962|Entities bob their head up and down when targeting towards the player. |238104|Blue orchid generation has decreased. |238265|version.json contains internal revision ID instead of game version ID. }} == Gallery == Worldgen Tuning Visualization.jpg 3D Noise Comparison.jpg Biome Size Comparison.jpg Windswept Savanna Debug.jpg == Video == {{Slicedlime|gPPzm2uTB3U|RQWVvTnxIco}} == References == {{Reflist}} == Navigation == {{Navbox Java Edition versions|1.1x}} [[de:21w40a]] [[es:Java Edition 21w40a]] [[fr:Édition Java 21w40a]] [[it:Java Edition 21w40a]] [[ja:Java Edition 21w40a]] [[pt:Edição Java 21w40a]] [[ru:21w40a (Java Edition)]] [[th:รุ่น Java 21w40a]] [[zh:21w40a]]