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This is a list of Java Edition 1.18 development versions.

1.18 Experimental Snapshot 1

1.18 Experimental Snapshot 1 is the first experimental snapshot for Java Edition 1.18, released on July 13, 2021,[1] which introduces new terrain generation and enables features from the preview data pack.

Additions

World generation

Caves
  • Completely overhauled.
  • Now stretch down to Y=-59.
  • The cavern now generates in 2 layers of different stone bases depending on the depth.
    • Cavern layer above Y=0 is made up of regular stone.
    • Stone transitions to deepslate from Y=0 to Y=-7.
    • Deepslate now completely replaces stone from Y=-8 to bedrock.
      • Certain types of ores and structures still generate in the deepslate layer, as well as tuff.
      • Dirt, diorite, granite and andesite do not generate in this layer.
  • Contain aquifers, bodies of water with different heights, independent of sea level (Y=63).
    • Aquifers below Y=0 sometimes generate with lava instead of water.[2]
  • Improved old caves, adding more variation.[3]
  • New noise caves, coming in 3 forms, cheese, spaghetti and noodle.
    • The original caves still exist with their generation slightly tweaked to better blend in with noise caves.
    • Cheese caves have large stone towers stretching from the bottom of the cave to the top.
      • Very large, often large enough to fly with elytra.
      • Abundant with springs, aquifers and ores.
    • Spaghetti caves are long, thin caves that have small aquifers and are more similar to original caves.
    • Noodle caves are thinner, squigglier and more claustrophobic variants of spaghetti caves.
Mountains
Ore veins

Technical

Debug screen
  • Added two new lines: Multinoise and Terrain.
    • Only appear if the dimension where the player is uses the multi-noise biome source type.
    • Multinoise lists the parameters used at the player's position in order to place a biome. C is continentalness, E is erosion, T is temperature, H is humidity and W is weirdness.
    • Terrain lists values related to terrain generation.[more information needed]

Changes

Blocks

Sculk Sensor
  • Have been re-added to the Creative Mode inventory.

Items

Bundle
  • Have been re-added to the Creative Mode inventory.
  • Can once again be crafted.

Mobs

Axolotls
Goat
General
  • Hostile mobs only spawn in areas where the light level is 0.
    • This change only affects block-light and not sky-light.[4]

World generation

Overworld
  • Now uses the multi-noise biome source type.
Lush Caves and Dripstone Caves
  • Now generate naturally underground and inside hills or mountains.
Deep Warm Ocean
  • Now generates naturally.
Swamp
  • Does not generate correctly. This is fixed in 1.18 experimental snapshot 2.[5]
Sub-biomes

The new ore generation for 1.18 Experimental Snapshot 1.

Ore distribution
  • The new ore distribution has been implemented, see below all the changes from 1.17 distribution to this.
    • Changed ore generation of all ores making them have a spread value like lapis lazuli ore. Some still retain a linear generation alongside a spread generation.
    • Coal ore, emerald ore, and copper ore no longer generate below Y=0.
      • Copper ore generates between the Y=0 and Y=96 and like all other ores, uses spread. It peaks at Y=48.
      • Emerald ore generates above Y=32 as a spread, peaking at Y=256 and decreasing in quantity as the altitude decreases.
      • Coal ore attempts to generate twice: once, evenly between an altitude of Y=136 and Y=256; and as a spread, peaking at an altitude of Y=96 and generating between an altitude of Y=0 and Y=192.
    • Other ores also generate differently.
      • Iron ore attempts to generate three times: once as a spread peaking at an altitude of Y=256, generating above Y=128; another as a spread peaking at Y=16 and generating with a minimum height of Y=-24 and a maximum height of Y=57, and a smaller one spreading evenly between the altitudes of Y=-64 and Y=-32.
      • Gold ore generates between the altitudes of Y=-64 and Y=32, peaking at Y=-16. The extra gold that generates in the badlands biome was left untouched.
      • Lapis lazuli ore attempts to generate twice: once, as a spread between the altitudes of Y=32 and Y=-32, peaking at an altitude of 0; and evenly between the altitudes of Y=64 and Y=-64, generating buried like ancient debris.
      • Redstone ore attempts to generate twice: once, evenly between an altitude of Y=15 and Y=-64; and as a spread, peaking at an altitude of -64 and generating below an altitude of Y=-32.
      • Diamond ore now generate as a spread, generating below Y=16 and peaking at altitudes near y=-64.
General
  • Terrain generation is now independent from biomes, with biomes adapting to whatever terrain they happen to generate throughout.[6]
    • This allows for natural variation in the terrain of any individual biome, both in terms of shape and elevation.
      • For example, forests and deserts could form up on a hill without needing a special biome just for that purpose.
    • This additionally allows for smoother transitions between biomes.
  • Terrain is now smoother and more extreme.

General

Height limit
  • Has been increased to 384 blocks, expanding 64 blocks up and 64 blocks down, with 320 being the limit upward and -64 being the limit downward.
World types

Gallery

Fixes

  • MC-126009 could be considered fixed by this version.

Issues

This version is not supported on the bug tracker, and therefore issues affecting it will be resolved as "Invalid".[7]

Trivia

  • This is the first time that the light level requirement for common hostile mob spawning has been changed for more than 10 years. The "light level 7 and below" rule was originally implemented on February 4, 2010, while the game was still in its Indev phase, and remained constant since with the exception of Java Edition Alpha v1.2.0 through Java Edition Alpha v1.2.0_02, where the restrictions were height based.
  • This is the first development version using the term "Experimental Snapshot", which starts the update development before the initial snapshots will begin, sometime in September.[1]

1.18 experimental snapshot 2

1.18 experimental snapshot 2 is the second experimental snapshot for Java Edition 1.18, released on July 20, 2021,[8][9] which makes numerous changes to world generation and mob spawning functionality related to spawners.

Additions

General

NBT tags
  • Spawners now have a new  CustomeSpawnRules [sic] tag, which lets players override the spawn rules of the spawned mob.
    • In the tag, players can specify  BlockLightLimit, which indicates the highest block-light the spawners will spawn mobs at.

Changes

Mobs

General

World generation

Beaches
  • Beaches are generally wider.
    • In some places there is a chance where no beaches generate at all, to provide some variation.
Extreme Hills
  • Renamed mountains to extreme hills, and gravelly mountains to gravelly hills.
Mountains
  • Sheep now spawn in meadows.
  • Rabbits now spawn more frequently in meadows.
  • Donkeys now spawn less frequently in meadows.
  • Blue orchid no longer spawns in meadows.
  • Meadows sometimes spawn a lone oak or birch, often with a bee nest.
  • Hostile mobs now spawn in the new mountain biomes.
  • Infested stone now generate in the new mountain biomes.
Ore distribution
  • Emerald ores now generate in the new mountain biomes.
Ore veins
  • Made ore veins slightly larger and more frequent.
Biomes
Swamp
  • Swamps now generate properly.
Lush Caves
  • Are now slightly smaller and slightly less common.
General
  • Biome placement is a bit smoother and less noisy. Fewer microbiomes dotting the terrain. Biomes tend to be a bit larger and less fragmented.
  • Underground biomes interfere less with surface biomes. They can still leak out of cave entrances sometimes.
  • Increased the height of some of the peaks.
    • Now can rarely reach up to Y=260.
  • Slightly increased the chance of finding large areas with flat terrain.
  • Structures now mostly show up in the right biomes.
  • Toned down the megacave entrances a little bit, and made them less likely to go all the way down to deepslate level.
  • Made cheese caves a little bit smaller on average, and a bit less likely to intersect the surface.
  • Reduced the chance of sand and gravel being placed in such a way that they immediately fall down on generation.
    • Some are now replaced with sandstone or stone.

General

Clouds
  • Raised cloud level from 128 to 192.

1.18 experimental snapshot 3

1.18 experimental snapshot 3 is the third experimental snapshot for Java Edition 1.18, released on August 10, 2021,[10][11] which makes numerous changes to world generation and fixes bugs from previous experimental snapshots.

Additions

World generation

Stony peaks
  • A new mountains biome that is a variant of lofty/snowcapped peaks that uses stone and strips of gravel, instead of snow and ice.
    • Is used to avoid temperature clashes.

Changes

Mobs

General
  • Mob spawning is now consistent throughout all altitudes increasing spawn rates in higher altitudes and decreasing spawn rates in lower altitudes.
    • The spawning rates are similar to 1.17's spawning rate at y=64.

World generation

Aquifers
  • Aquifers can go deeper and are more likely to connect with cave systems further down.
  • Added more high-frequency variation to aquifers, to reduce the risk of massively huge areas with waterfilled caves everywhere.
    • Underground lakes and flooded regions are more likely to be spread out instead of concentrated in one region.
Badlands
  • Tweaked badlands so they sometimes show up in flat areas next to plateaus, and made the red sand generate higher up (to account for the generally higher terrain).
  • Eroded badlands no longer create floating pillars on top of the water surface.
Biomes
  • Tweaked biome placement to reduce the chance of temperature clashes.
  • Tweaked biome placement to allow for more noisiness and diversity.
    • This allows for the reintroduction of microbiomes.
Beaches
  • Tweaked beaches a bit, to make them more inclined to show up on flat coastlines rather than hilly areas.
  • Reduced the amount of stone shores.
Desert temples
  • Desert temples spawn on the surface rather than at a fixed y-level.
Mountains
  • Made peak biomes and meadows less likely to generate in flat low elevation areas.
  • Snowy slopes and snowcapped peaks no longer place dirt under the snow.
Pillager outposts
  • Now generate in all the new mountain biomes.
Swamps
  • Swamps are less likely to overlap cold or dry biomes, and they no longer place hanging water.
Villages
General
  • Smoothed out the cliffs in shattered terrain a bit.
  • Coastlines and river banks are less likely to be intersected by aquifers.
    • Local water levels are mostly used in terrain that doesn't border a river or ocean.
    • Cave openings and ravines that intersect an ocean or river will mostly use sea level.
  • Inland low-elevation areas are less likely to have flooded caves everywhere.
  • Grass no longer generates underwater.
  • Reduced the chance of incorrect surface placement.
  • Reduced the chance of river biome generating in dry mountain gorges.

Fixes

  • Fixed goats not spawning in the new mountain biomes.
  • Fixed an issue where players in multiplayer can face far more or far fewer enemies than intended, particularly when other players are flying.
  • MC-30560 was fixed by this version, although it will not be marked as such due to the bug tracker not handling experimental snapshots.

1.18 experimental snapshot 4

1.18 experimental snapshot 4 is the fourth experimental snapshot for Java Edition 1.18, released on August 17, 2021,[12][13] which makes numerous changes and tweaks to world generation.

Changes

World generation

Badlands
  • Now is larger and less likely to show up as microbiome splotches.
  • Terracotta bands now go higher.
  • Wooded badlands grass and trees now start higher.
Biomes
  • Tweaked biome placement in general to reduce the risk of harsh collisions.
  • Now biome placement is a bit smoother and less noisy. This should result in fewer microbiomes.
  • Removed surface freezing for hot biomes, and raised the altitude at which snow layers are placed.
Desert
  • Now is larger and less likely to show up as microbiome splotches.
  • Desert pyramids now tend to be partially buried and no longer generate on water.
Extreme Hills
  • The terrain is now more extreme and fiddled with the placement of shattered terrain and extreme hills in general to make it fit in with the terrain better.
Jungle pyramids
  • No longer generate on water.
Ore distribution
  • Reduced the number of diorite/andesite/granite blobs on the surface.
  • Copper blobs now are bigger in dripstone caves.
  • More iron is generated in mountains.
Rivers
  • Reduced the likelihood of rivers being cut off and turning into steep dry river gorges in mountainous terrain.
  • Rivers will tend to either carve a fjord through the mountain range, or raise the terrain to form a saddle valley between the peaks.
Snowy Slopes
  • Replaced the dirt layer by snow blocks.
Stone shores
Stony peaks
Swamps
  • Tweaked swamp placement a bit.
  • Are less likely to extend deeply inland.

1.18 experimental snapshot 5

1.18 experimental snapshot 5 is the fifth experimental snapshot for Java Edition 1.18, released on August 25, 2021,[14][15] which makes numerous changes and tweaks to world generation.

Changes

Mobs

General
  • Removed the height-based spawning change that was made in snapshot 3.

World generation

Badlands
  • Slightly decreased the size of Badlands.
Caves
Dripstone Caves
  • In world generation, grass is replaced with stone (if generated near grass).
Jungle Edge
  • Re-added the Jungle Edge biome.
Lush Caves
  • Now generate with springs.
  • Were unintentionally made smaller and more fragmented.[16]
Mountains
  • Mountain tops are now more jagged and pointy.
  • Mountain areas and peak biomes now are slightly larger on average.
  • Raised the average mountain height
Mushroom Fields
  • Tweaked mushroom fields biome, now it matches the shape of the islands better.
Rivers
  • Tweaked the depth of rivers and the steepness of river banks.
  • They are less likely to be super deep or get cut off in flat areas.
  • Rivers integrate better with swamps, the river tends to get shallow and merge with the swamp instead of carving through.
Swamps
  • Moved swamps slightly more inland.
  • Swamp trees can grow in slightly deeper water than before, populating deeper marshes.
General
  • Small lakes features are no longer placed in dry and hot biomes (desert, savanna, badlands).
  • Reduced the number of lake feature placements in other biomes.
  • Water springs can generate in more types of blocks such as dirt and snow, increasing the likelihood of small mountain streams and waterfalls.
  • Reduced the amount of shattered terrain and shattered savanna biome, replacing some of that space with flatter beaches instead.
1.18 Experimental Snapshot Comparison.jpg

Fixes

  • Fossils with diamonds no longer generate above deepslate level.
  • Fixed an unintentional change from snapshot 4 that made mountains lower and smoother.
  • Fixed an indent in the code.

1.18 experimental snapshot 6

1.18 experimental snapshot 6 is the sixth experimental snapshot for Java Edition 1.18, released on September 1, 2021,[17][18] which introduces changes to terrain generation and tweaks biome placement.

Changes

Mobs

Horses, mules, and donkeys
Llamas

World generation

Aquifers
  • Aquifers under oceans or rivers are more likely to link to the underground.
    • More likely to find cave openings on ocean floors that actually lead somewhere instead of being cut off.
    • Caves at Y=0 to Y=40 which under oceans are more likely to be flooded.
Giant tree taiga and giant spruce taiga
  • No longer considered as cold climates.
    • Decreased the chance of mixed in with snowy biomes, caused a small reshuffle of other biomes to maintain the overall balance.
Grove and snowy slopes
  • Decreased the chance of generating on mountain peaks.
  • Altered generation so that they tend to spawn farther away from contrasting temperatures.
Springs
  • Slightly reduced the number of water springs.
Swamps
  • Now generate in dry areas.
  • Decreased the chance of being fragmented.
Canyons
  • Underwater variants readded
    • No longer use a specific carver for underwater canyons. Instead, they generate on ocean floors, using normal noise caves and carvers.
    • Now have more natural variation.
General
  • Decreased the chance of generating cold microbiomes.
  • Slightly increased the number of underwater magma blocks, to increase the chance of finding air when diving in aquifers.
  • Cave carvers can now carve through sand and gravel on ocean floors.

Fixes

1.18 experimental snapshot 7

1.18 experimental snapshot 7 is the seventh and final experimental snapshot for Java Edition 1.18, released on September 8, 2021,[19][20] which introduces changes to terrain generation and tweaks to elytra due to various server chunk loading issues.

Changes

Items

Elytra
  • No longer take durability damage when gliding, only when boosting with firework rockets.
  • Decreased the firework rocket boost on an elytra from 30 blocks per second to 26 blocks per second.
  • Now break when the item reaches 0 durability.

World generation

Caves
  • Noodle caves are no longer capped at y=130, allowing cave openings and cracks in mountain peaks.
General
  • Slightly smoothened the terrain by lowering the noise.

21w37a

21w37a is the first proper snapshot for Java Edition 1.18, released on September 15, 2021,[21] which adds the contents of the previous experimental snapshots and brings more parity with Bedrock Edition.

Additions

General

Commands
  • /jfr
    • When enabled, begins profiling with Java FlightRecorder, as well as the following custom events:
      • minecraft.ServerTickTime: Sampling event exposing average server tick times in intervals of a second
      • minecraft.ChunkGeneration: Time taken to generate individual chunk stages
      • minecraft.PacketRead / minecraft.PacketSent: Network traffic
      • minecraft.WorldLoadFinishedEvent: Initial world loading duration
    • The profiling can be stopped in-game by using /jfr stop.
Font
  • Added illageralt, the rune-like font from Minecraft Dungeons.
    • Currently only usable via commands
Loot tables
  • Added the type field, which is mandatory.
    • Written into BlockEntityTag.id to ensure that the tag can be migrated correctly between versions
Options
  • Can now disable lightning flashes, which prevents lightning from making the sky flash. Lightning bolts themselves will still appear.
  • The device the game outputs audio to can now be chosen in-game.
  • Added "Priority updates" to video settings.
    • Determines as to which chunk sections are updated synchronously in a single frame.
      • Three options:
      • nearby, which corresponds to how chunk sections were updated before 21w37a, and by player and none, which reduce stuttering when placing or removing blocks.
        • However, the latter two options may cause rare visual delays in world updates. These options also appear to be improperly capitalized.[22]
Subtitles
  • Added subtitles for various bundle sounds.

Changes

Blocks

Enchanting Table
  • Now emits a light level of 7.
Cave Vines, Kelp, Twisting Vines and Weeping Vines
  • Will stop growing if shears are used on the tip.

Mobs

Axolotls
  • Now only spawn in lush caves.
  • Now have their own mob cap.
Vindicators, pillagers, and evokers
Goat

General

Options
  • The Sneak and Sprint, and Auto-jump options have been moved to the Controls tab.
  • Render distance now causes chunks to load in a cylinder shape around the player instead of a square.
Splashes
  • The splash "[this splash text has been delayed until part 2]" has been changed to "[this splash text is now available]".
Tags
  • Renamed the lava_pool_replaceables block tag to lava_pool_stone_cannot_replace.
Other
  • Worlds last opened before Java Edition 1.2 can no longer be opened.
    • These worlds must be opened in a version prior to 21w37a (preferably between Java Edition 1.2 and Java Edition 1.6.4).
    • An error will be shown when attempting to open these worlds.
  • Worlds from before 21w37a currently cannot be opened, though this will change before 1.18 is released.
  • Removed length limits for scoreboards, score holders and team names.
  • Data pack format has been increased to 8.

Known issues

Fixes

44 issues fixed
From released versions before Java Edition 1.18
  • MC-29274 – Withers will not pursue players in survival mode unless attacked.
  • MC-30560 – River through eroded badlands biome generates floating rock formations at water surface.
  • MC-54545 – Client render distance doesn't adjust to server render distance if they are different, causing faulty chunk loading.
  • MC-65628 – Desert pyramids generate underground when using amplified or custom terrain.
  • MC-123277 – Too long scoreboard objectives and team names are not detected when commands are parsed.
  • MC-129266 – Jagged ocean transitions and slower biome generation.
  • MC-138801 – The interactions between a biome and another biome and its variants are inconsistent.
  • MC-140690 – Giant spruce taiga hills have no difference with giant spruce taiga.
  • MC-159025 – Drowned do not spawn in warm ocean biomes.
  • MC-160710 – Chat messages written while sleeping are deleted after waking up.
  • MC-166423 – Splash water bottles don't damage endermen.
  • MC-182362 – Score callbacks with a too long name break callback chain.
  • MC-202376 – Rabbits, instead of spawning on snow blocks, spawn on snow layers.
  • MC-208601 – Axolotls do not avoid danger when pathfinding.
  • MC-212113 – Glow lichen can spawn underwater whilst not in a cave.
  • MC-213779 – FPS dramatically decreases when looking up in world with large height.
  • MC-214783 – Oceans generate with stone floors.
  • MC-214797 – Pointed dripstone can generate floating at transitions between local water levels.
  • MC-214799 – Aquifiers sometimes create air pockets.
  • MC-214864 – Hard edges when new caves generate near surface.
  • MC-214989 – Isolated floating mineshaft platform.
  • MC-215296 – Mineshafts often don't generate in floating island worlds.
  • MC-215876 – Dirt can generate below y=0 from mineshafts.
  • MC-216784 – Ruined portals don't generate below y=0.
  • MC-216952 – Some chunks interrupting with cave systems filled with blocks.
  • MC-216967 – Kelp and seagrass can generate in aquifers.
  • MC-217465 – Unnatural shape looking like a chunk border but appears to be completely unrelated to chunk borders.
  • MC-217509 – Inefficient generation of aquifers, noise caves and ore veins.
  • MC-219774 – Magma blocks spawn everywhere underwater in 21w10a.
  • MC-219946 – Weird flat sections of terrain.
  • MC-221777 – Horses donkeys, mules, llamas, and trader llamas do not follow players holding food.
  • MC-221815 – Flat roofs in underwater caves.
  • MC-221917 – Dripstone, pointed dripstone, and cave magma generate in oceans.
  • MC-222051 – Iron ore generation was not increased in 21w13a.
  • MC-222379 – Magma can spawn under air in underwater caves.
  • MC-223044 – Floating water can generate in ravines.
  • MC-223051 – Dripstone can generate in surface lakes.
  • MC-223148 – New extended height message goes behind the scrolling bar.
  • MC-226184 – Axolotls pathfinding to water can sometimes fall in wide holes.
  • MC-227244 – Ore blocks from ore veins float in underwater magma ravines.
  • MC-230343 – Parity issue: enchanting tables do not emit a light level of 7.
  • MC-231721 – Animals named "Dinnerbone" do not look at the food correctly.
  • MC-231863 – Game crashes when trying to access the Realms settings.
  • MC-233050#lava_pool_stone_replaceables tag name is misleading.

Notes and references

  1. a b "New world generation in Java available for testing" by Henrik Kniberg. Minecraft.net, July 13, 2021
  2. "Minecraft Snapshot 21w16a" – Minecraft.net, April 21, 2021
  3. "Oh forgot to mention in the changelog* we also added some more variation to the old cave carvers (width, heigh, floor cutoff, etc). Just to make them blend in a bit better with the noise caves instead of being instantly recognizable."@henrikkniberg on Twitter, February 25, 2021
  4. "Some more information about: "Monsters will only spawn in complete darkness" * This means that generic monster spawning is now only in complete darkness. (Mobs that have special rules like slimes or phantoms are unaffected by this) * This only affects block-light, not sky-light"@_Ulraf_ on Twitter
  5. a b "Noticed some biomes were missing or not generating properly in the experimental snapshot. Re-adding swamps, ice spikes, and eroded badlands. Also experimenting with the cloud level."@henrikkniberg on Twitter, July 15, 2021
  6. "Minecraft 1.18 experimental snapshot"– Henrik Kniberg on YouTube, July 13, 2021
  7. MC-231984
  8. "New world generation in Java available for testing" by Henrik Kniberg. Minecraft.net, July 20, 2021
  9. "Minecraft 1.18 experimental snapshot 2 is out!"u/MrHenrik2 on Reddit, July 20, 2021
  10. "New world generation in Java available for testing" by Henrik Kniberg. Minecraft.net, August 10, 2021
  11. "Minecraft 1.18 experimental snapshot 3 is out!"u/MrHenrik2 on Reddit, August 10, 2021
  12. "New world generation in Java available for testing" by Henrik Kniberg. Minecraft.net, August 17, 2021
  13. "Minecraft 1.18 experimental snapshot 4 is out!"u/MrHenrik2 on Reddit, August 17, 2021
  14. "New world generation in Java available for testing" by Henrik Kniberg. Minecraft.net, August 25, 2021
  15. "Minecraft 1.18 experimental snapshot 5 is out!"u/MrHenrik2 on Reddit, August 25, 2021
  16. "Minecraft 1.18 experimental snapshot 6 is out!"u/MrHenrik2 on Reddit, September 1, 2021
  17. "New world generation in Java available for testing" by Henrik Kniberg. Minecraft.net, September 1, 2021
  18. "Minecraft 1.18 experimental snapshot 6 is out!"u/MrHenrik2 on Reddit, September 1, 2021
  19. "New world generation in Java available for testing" by Henrik Kniberg. Minecraft.net, September 8, 2021
  20. "Minecraft 1.18 experimental snapshot 7 is out!"u/MrHenrik2 on Reddit, September 8, 2021
  21. "Minecraft Snapshot 21w37a" – Minecraft.net, September 15, 2021
  22. MC-236615
  23. MC-236618
  24. MC-236698
  25. MC-236816
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