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Bug
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Resolution: Duplicate
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None
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1.18.32, 1.19.30, 1.19.41, 1.20.12 Hotfix, 1.20.15 Hotfix
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Confirmed
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Multiple
The locations and shapes of the amethyst geodes, lava pools and possibly even other features only depend on the last 32 bits of the 64-bit seed meaning they are the same for many worlds. Even the budded amethyst block positions in the amethyst geodes are the same.
Steps to reproduce:
- Create a world with any seed.
- Find an amethyst geode or a lava pool and remember its coordinates.
- Create a world with the seed of the first world but with any integer multiple of 4294967296 (2^32) added to it.
- Go to the feature's coordinates but in the new world.
- Compare their locations and their shape.
Observed results:
The features have the same shape and location.
Expected results:
Every element of a world should depend on all 64 bits of the seed.
Notes: A similar glitch also effects carver caves (MCPE-154333), structures (MCPE-154939), the end (MCPE-155137) and the nether (MCPE-154947). Only the surface biomes and noise caves of the overworld aren't effected by such a bug.
- duplicates
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- Open
[MCPE-156090] Some features/decorators like lava pools, amethyst geodes etc. depend only on the last 32 bits of the 64-bit seed.
I thought this is a different bug from mcpe - 154939, because that one is for structures (which can be found with /locate), but this one is for decorators (which cannot be found with /locate). Or should I merge the two bug reports and write the information from this one because of the similarity between decorators and structures?
Thank you for your report!
We're tracking this issue in MCPE-154939, so this ticket is being resolved and linked as a duplicate.
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The seeds and the coordinates are given in the images and their names. Any two seeds that have a difference of 2^32 will work. You just need to find a feature or go to the nether or the end and compare their shape and locations, because this bug affects them too. That's probably because, despite the seeds being updated to 64 bit, the generation of features, structures, caves, the nether and the end (and possibly some other things that I'm not aware of) still uses only 32 of the bits.
Could you please provide examples of two different seeds, one with 2^32 added to it and one not, where the issue can be observed?
This ticket will automatically reopen when you reply.
Thank you for your report!
However, this issue has been temporarily closed as Awaiting Response.
Is this still an issue in the latest version? If yes, can you please add it to the affected versions (or mention it if you are not the reporter)?
This ticket will automatically reopen when you reply.
Quick Links:
📓 Issue Guidelines – 💬 Mojang Support – 📓 Project Summary – 📧 Suggestions – 📖 Minecraft Wiki
Yes, please update the other ticket with this information if possible.