Minecraft:Java Edition 1.18 experimental snapshot 2

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1.18 Experimental Snapshot 2 (known as 1_18_experimental-snapshot-2 in the launcher) is the second experimental snapshot for Minecraft:Java Edition 1.18, released on July 20, 2021,<ref>Template:Mcnet</ref><ref>Template:Reddit</ref> which makes numerous changes to world generation and mob spawning functionality related to Minecraft:monster spawners.

Additions

File:Snapshot 1 Map.png

A map of biome placement in the first snapshot.

File:Snapshot 2 Map.png

A map of biome placement in this snapshot.

General

Minecraft:NBT format

Spawners now have a new Template:NbtTemplate:Sic tag, which lets players override the spawn rules of the spawned mob.
- In the tag, players can specify Template:Nbt, which indicates the highest block-light the spawner spawns mobs at.

Changes

Mobs

General

Minecraft:Zombie, Minecraft:skeleton, Minecraft:spider, and Minecraft:cave spider spawners now spawn mobs up to block-light level 11.

World generation

Minecraft:Beaches

Beaches are generally wider.
- In some places there is a chance where no beaches generate at all, to provide some variation.

Minecraft:Extreme hills

Renamed mountains to extreme hills, and gravelly mountains to gravelly hills.

Minecraft: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.

Minecraft:Ore distribution

Emerald ores now generate in the new mountain biomes.

Minecraft:Ore veins

Made ore veins slightly larger and more frequent.

Minecraft:Biomes

Minecraft:Ice spikes, Minecraft:eroded badlands, and Minecraft:savanna plateau generate naturally.

Minecraft:Swamp

Swamps now generate properly.

Minecraft: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.