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[]
World generation[]
- Upgrading of old worlds
- Terrain from new chunks will now blend with existing terrain from old chunks, preventing glitched borders from occurring.
- The old bedrock layer between Y=0 and Y=4 in old chunks gets replaced with deepslate.
- If there is bedrock at Y=0, lower places in old chunks will be filled with deepslate.
- Caves do not generate below Y=0 in old chunks but lava lakes and geodes may generate.
- A new bedrock layer is placed at Y=-64.
- Worlds upgraded in this snapshot have these changes permanently applied.
General[]
- Added block tag
big_dripleaf_placeable
.- Contains farmland and the #dirt and #small dripleaf placeable block tags.
- Big dripleaf can be placed on blocks in this tag.
Changes[]
Blocks[]
- Restricted big dripleaf placement to clay, coarse dirt, dirt, farmland, grass blocks, moss blocks, mycelium, podzol and rooted dirt.
World generation[]
- Water levels change less often (slightly fewer underground waterfalls).
- Lava aquifers are slightly less common.
- Removed deep warm ocean biomes.
- Warm ocean biomes now generate in deep waters.
- Have been reshuffled again. Worlds will not look like as they did in previous snapshots.[2]
General[]
- Removed chunk’s
Level
and moved everything it contained up.Level.Entities
has moved toentities
.Level.TileEntities
has moved toblock_entities
.Level.TileTicks
andLevel.ToBeTicked
have moved toblock_ticks
.Level.LiquidTicks
andLevel.LiquidsToBeTicked
have moved tofluid_ticks
.Level.Sections
has moved tosections
.Level.Structures
has moved tostructures
.Level.Structures.Starts
has moved tostructures.starts
.Level.Sections[].block_states
has moved tosections[].block_states
.Level.Sections[].biomes
has moved tosections[].biomes
.
- Added
yPos
the minimum section y position in the chunk. - Added
below_zero_retrogen
containing data to support below zero generation. - Added
blending_data
containing data to support blending new world generation with existing chunks.
- The Priority Updates video setting has been renamed to Chunk Builder, added tooltips to its three options, and renamed them:
- "nearby" renamed to "Fully Blocking".
- "by player" renamed to "Semi Blocking".
- "none" renamed to "Threaded".
- Changed some internal details of block and fluid ticking to improve save times.
Fixes[]
- 11 issues fixed
- From released versions before 1.18
- MC-49010 – Cloning pressure plates or buttons whilst they're activated keeps them pressed forever.
- 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-224205 – Cloned big dripleaves remain tilted forever when their tilt value is not equal to "none".
- MC-228745 – Big dripleafs can't be supported by farmland.
- MC-238073 – Decorators are independent of world seed.
- From the 1.18 development versions
- MC-236615 – Priority updates setting has improper capitalization.
- 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.
Video[]
Video made by slicedlime:
References[]
- ↑ "Minecraft Snapshot 21w43a" – Minecraft.net, October 27, 2021
- ↑ "Unfortunately the seeds have been shuffled again, so worlds will not look like they did in previous snapshots. Hopefully world seeds will be stable after this though, so let the real seed hunt begin!" – @henrikkniberg on X, October 27, 2021