MC-244146Parity issue: Bedrock pattern at the bottom of the Overworld is not the same across editions
1.18 changes the bedrock at the bottom of the world such that it depends on the world seed. 1.18 also aims to have world generation match as closely as possible in Java Edition and Bedrock Edition. However, using the same seed on both editions and clearing out an area to expose the topmost level of bedrock shows a different pattern created by said bedrock, even though it'd be expected they'd be the same.
Linked Issues
testing discovered1
Normal
MCPE-149849
Created Issue:
Parity issue: Bedrock pattern at the bottom of the Overworld is not the same across editions
1.18 changes the bedrock at the bottom of the world such that it depends on the world seed. 1.18 also aims to have world generation match as closely as possible in Java Edition and Bedrock Edition. However, using the same seed on both editions and clearing out an area to expose the topmost level of bedrock shows a different pattern created by said bedrock, even though it'd be expected they'd be the same.
Attachments1
relates to
![[Mod] SPGoding](../../../data/avatars/users/44622.png){kind=small}
testing discovered
![[Mod] tryashtar](../../../data/avatars/users/41963.png){kind=small}
![[Bot] Arisa](../../../data/avatars/users/43007.png){kind=small}
![[Mod] Les3awe](../../../data/avatars/users/79847.png){kind=small}
![[Mod] Jarl-Penguin](../../../data/avatars/users/92849.png){kind=small}
Discovered while testing MC-244146.
The bug
The pattern formed by bedrock at the bottom of the world seems to always be constant, regardless of the world seed.
This was previously the case on Java Edition, but was intentionally changed in 21w40a (https://www.minecraft.net/en-us/article/minecraft-snapshot-21w40a), making the absence of this effect in Bedrock Edition a parity problem. I also remember it being different in Bedrock Edition from seed to seed in older versions, so I don't know why it's gone to Java's old behaviour.
The two seeds tested were 1 (input as ddnqavbk due to MCPE-44604) and 1736465059.
How to reproduce
- Generate a world
- Teleport yourself to (0,-59,0)
- /fill ~-20 ~ ~-20 ~20 ~3 ~20 air
- Note the shape of the bedrock pattern - take a screenshot if needed
- Redo the above steps but generate a different world
Expected results
The shapes formed by bedrock would differ due to the seeds being distinct.
Actual results
The shapes seem identical.
As it seems, the bedrock pattern is now just constant for all Bedrock Edition worlds regardless of seed, as it previously was on Java.
Now reported under MCPE-149849
This report cannot be addressed until bedrock makes a decision about MCPE-149849