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21w43a is the seventh snapshot for Java Edition 1.18, released on October 27, 2021,[1] which adds the old world upgrading and fixes bugs.
Additions
General
- Old worlds upgrading
- When generating close to old chunks hew terrain is adjusted to better match the existing terrain at the borders.
- The old bedrock layer between Y=0 and Y=4 in old chunks gets replaced with Deepslate
- Worlds upgraded in this snapshot will permanently have this deepslate.
- A new Bedrock layer is placed at Y=-64
Changes
General
- Chunk format
- Removed chunk’s
Leveland moved everything it contained up. - Chunk’s
Level.Entitieshas moved toentities. - Chunk’s
Level.TileEntitieshas moved toblock_entities. - Chunk’s
Level.TileTicksandLevel.ToBeTickedhave moved toblock_ticks. - Chunk’s
Level.LiquidTicksandLevel.LiquidsToBeTickedhave moved tofluid_ticks. - Chunk’s
Level.Sectionshas moved tosections. - Chunk’s
Level.Structureshas moved tostructures. - Chunk’s
Level.Structures.Startshas moved tostructures.starts. - Chunk’s
Level.Sections[].BlockStatesandLevel.Sections[].Palettehave moved to a container structure insections[].block_states. - Chunk’s
Level.Biomesare now paletted and live in a similar container structure insections[].biomes. - Added
yPosthe minimum section y position in the chunk. - Added
below_zero_retrogencontaining data to support below zero generation. - Added
blending_datacontaining data to support blending new world generation with existing chunks.
- General
- Some internal details of block and fluid ticking have been changed to improve save times.
Fixes
- 8 issues fixed
- From released versions before 1.18
- MC-131930 – Deep warm ocean generates without coral and sea pickles.
- MC-156616 – Badlands layers not generating properly.
- MC-217379 – Pufferfish don't spawn in deep warm ocean.
- MC-238073 – Decorators are independent of world seed.
- From the 1.18 development versions
- MC-236624 – Deep warm oceans don't count towards the "Adventuring Time" advancement.
- MC-236970 – Badlands strata is covered by orange terracotta at Y=160 and above.
- MC-238939 – Stone can generate in the Nether.
- From the previous development version
- MC-239397 – Lava pockets generate in icebergs.
References
- ↑ "Minecraft Snapshot 21w43a" – Minecraft.net, October 27, 2021