There is only stone below chunks loaded before 1.18
Reproduce
Create a world in 1.17.1
Load the world in 21w44a
Go in spectator mode under y=0
Observed Result
There is no deepslate
Expected Result
There would be deepslate
Linked issues
is duplicated by 10
MC-240486
Deepslate go bye bye at old chunks and cave blending dont match
Resolved
MC-240488
Deepslate does not spawn under y0.
Resolved
MC-240496
Stone generating below 0 in caves
Resolved
MC-240538
When exporting worlds from 1.17.1 to 1.18, Stone appears in negative Y levels instead of Deepslate
Resolved
MC-240577
Caves generating below existing chunks are made of Stone instead of Deepslate, when upgrading the world from 1.17.1
Resolved
5 more links
relates to 2
Attachments
Comments 3
There is also (still) no bedrock, just void past y-63
1.17 world, 1.17.1 chunk, upgraded directly from 1.17.1 => 21w44a, no in between versions
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This also doesn't make any sense at all cuz caves below 0 are absolutely deepslate.