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Bug
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Resolution: Awaiting Response
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None
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1.18 Pre-release 5, 1.18 Pre-release 8
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Unconfirmed
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World generation
Custom superflat generation seem to be inconsistent when putting in structures/decorators with the new world height.
Structures such as geodes, mineshafts are generating only above y=0.
Strongholds seem to be not generating at all.
Lava lake features not generating below y 0.
Most decorators show skewed and inconsistent generation vs default overworld gen:
Tuff and gravel patches not generating below y 0
Redstone, lapis lazuli, iron ores not generating their usual heights below y 0
Diamond ore generating abnormally above y 16
Other biome-specific decoration has not fully been tested.
For windswept hill (and likely any mountain biome)-related generation, infested blocks are not generating below y 0.
How to spot/reproduce:
Generate a custom superflat world with stone or deepslate for ores and other things to generate in. I suggest filling in the range of the ore distribution.
Reveal ores and check for structures.
Superflat Presets:
Tunnelers' Dream for best observed results.
Overworld, Desert, and Snowy Kingdom will show the lower decorator inconsistency.
For the images I generated a custom preset (no datapacks; modifying Tunnelers' Dream)
minecraft:bedrock,64*minecraft:deepslate,230*minecraft:stone,5*minecraft:dirt,minecraft:grass_block;minecraft:windswept_hills