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Bug
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Resolution: Fixed
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21w38a, 21w40a, 21w41a, 21w42a, 21w43a
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Confirmed
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World generation
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Normal
Background
In 1.18 the biomes are laid out in a 5d grid of noise values. Usually all grid cells are filed by one biome. However, if a grid cell is not filled, the world generation will pick the biome from the cell with the closest values.
The bug
For the combination of peak weirdness, coast continentalness, and erosions 0 to 3 there are no biomes defined. This causes the generation to sometimes pick ocean biomes (that are in the cells with lower continentalness) leading to them generating on land. These are the only grid cells that have no biome definitions.
Ingame effects
Here are some areas where oceans generate on land (sometimes very high up in the mountains) because of this bug. All of these positions are on seed 1 . (updated to 21w41a)
Ocean on land:
/execute in minecraft:overworld run tp @s -7100.73 103.11 63.60 20.70 49.80
Ocean on peak:
/execute in minecraft:overworld run tp @s 28441.72 153.99 -2198.79 -28.80 46.50
- is duplicated by
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MC-238610 Mini Oceans, Dried Up
- Resolved
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MC-238778 Ocean biomes generate on land
- Resolved
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MC-239179 Underwater Structure generates on land
- Resolved
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MC-240197 Odd Biome Generation
- Resolved
- relates to
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MCPE-149983 Seed parity: Bedrock cliff facades differ from the Java ones due to MC-237621 fix
- Resolved