MC-244152Bedrock pattern seems roughly symmetric around world origin
The bug
When at the exact center of the world, the patterns formed by bedrock appear to have a sort of imperfect mirror symmetry to them, rather than the complete randomness that would be expected.
How to reproduce
- Teleport yourself to 0, -59, 0
- Use a fill command to clear out an air space: /fill ~-20 ~ ~-20 ~20 ~5 ~20 air
- Use a fill command to replace deepslate and other desired blocks with a lighter block to make bedrock stand out more: /fill ~-70 ~-1 ~-70 ~70 ~-1 ~70 white_concrete replace #deepslate_ore_replaceables
Expected results
The bedrock would just be random noise.
Actual results
There is definitely visible symmetry that can be seen in the shapes the bedrock forms, with occasional imperfections.
Linked Issues
![[Mod] ampolive](../../../data/avatars/users/18949.svg){kind=small}
NormalCreated Issue:
Bedrock pattern seems roughly symmetric around world origin
Discovered while testing MC-244146.
The bug
When at the exact center of the world, the patterns formed by bedrock appear to have a sort of imperfect mirror symmetry to them, rather than the complete randomness that would be expected. I've tested this on the seeds 0 (pollinating sandboxes) and 1 so far - it may not affect higher numbers.
How to reproduce
- Teleport yourself to 0, 59, 0
- Use a fill command to clear out an air space: /fill ~-20 ~ ~-20 ~20 ~5 ~20 air
- Use a fill command to replace deepslate and other desired blocks with a lighter block to make bedrock stand out more: /fill ~-70 ~-1 ~-70 ~70 ~-1 ~70 white_concrete replace deepslate
Expected results
The bedrock would just be random noise.
Actual results
There is definitely visible symmetry that can be seen in the shapes the bedrock forms, with occasional imperfections.
Attachments1
Discovered while testing MC-244146.
The bug
When at the exact center of the world, the patterns formed by bedrock appear to have a sort of imperfect mirror symmetry to them, rather than the complete randomness that would be expected.
I've tested this on the seeds 0 (pollinating sandboxes) and 1 so far - it may not affect higher numbers.How to reproduce
- Teleport yourself to 0, 59, 0
- Use a fill command to clear out an air space: /fill ~-20 ~ ~-20 ~20 ~5 ~20 air
- Use a fill command to replace deepslate and other desired blocks with a lighter block to make bedrock stand out more: /fill ~-70 ~-1 ~-70 ~70 ~-1 ~70 white_concrete replace deepslate
Expected results
The bedrock would just be random noise.
Actual results
There is definitely visible symmetry that can be seen in the shapes the bedrock forms, with occasional imperfections.
Discovered while testing MC-244146.
The bug
When at the exact center of the world, the patterns formed by bedrock appear to have a sort of imperfect mirror symmetry to them, rather than the complete randomness that would be expected.
How to reproduce
- Teleport yourself to 0, -59, 0
- Use a fill command to clear out an air space: /fill ~-20 ~ ~-20 ~20 ~5 ~20 air
- Use a fill command to replace deepslate and other desired blocks with a lighter block to make bedrock stand out more: /fill ~-70 ~-1 ~-70 ~70 ~-1 ~70 white_concrete replace #deepslate_ore_replaceables
Expected results
The bedrock would just be random noise.
Actual results
There is definitely visible symmetry that can be seen in the shapes the bedrock forms, with occasional imperfections.
![[Mojang] Adrian Östergård](../../../data/assets/gravatar/nighter.jpeg){kind=small}
![[Mod] Michael Wobst](../../../data/avatars/users/37868.png){kind=small}
![[Mod] SPGoding](../../../data/avatars/users/44622.png){kind=small}
discovered while testing
Discovered while testing MC-244146.
The bug
When at the exact center of the world, the patterns formed by bedrock appear to have a sort of imperfect mirror symmetry to them, rather than the complete randomness that would be expected.
How to reproduce
- Teleport yourself to 0, -59, 0
- Use a fill command to clear out an air space: /fill ~-20 ~ ~-20 ~20 ~5 ~20 air
- Use a fill command to replace deepslate and other desired blocks with a lighter block to make bedrock stand out more: /fill ~-70 ~-1 ~-70 ~70 ~-1 ~70 white_concrete replace #deepslate_ore_replaceables
Expected results
The bedrock would just be random noise.
Actual results
There is definitely visible symmetry that can be seen in the shapes the bedrock forms, with occasional imperfections.
![[Mojang] Felix Jones](../../../data/avatars/users/40484.png){kind=small}
[Mojang] Felix Jones[Mojang] Felix Jonesis duplicated by
![[Bot] Arisa](../../../data/avatars/users/43007.png){kind=small}
![[Mod] Avoma](../../../data/avatars/users/86198.png){kind=small}
![[Mojang] slicedlime](../../../data/assets/gravatar/slicedlime.jpeg){kind=small}
![[Mod] ManosSef](../../../data/avatars/users/61702.png){kind=small}
Invalid, modded game.
Also, don't intentionally make duplicates! MC-244152
Thank you for your report!
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Can confirm as of 1.18 (rc2 inc.)
Just want to add that this is still the case on 1.19. Just dug down to bedrock in my survival world at 00, and I have perfectly mirrored bedrock generation in a 5×5 area (2 lines symmetry).