Certain seeds cause features to repeat
Summary
Structures and world features are repeating diagonally.
Steps to Reproduce...
One example of repeating features:
- Create a world with seed 1669320484.
- /tp -3439 99 2148
What I Excepted to Happen Was...
World generation should be random
What Actually Happened Was...
Some world features are repeated in a pattern, examples are small sections of coral reefs that repeat over and over.
Notes
A video has been uploaded that demonstrates the issue far better than I can in text:
This Seed Makes EVERYTHING Repeat... Including Ancient Debris!?
Original Description:
this seed:1669320484 infinite loop at specific
at -3439 ~ 2148
and 134 ~ 54
Linked Issues
is duplicated by10
MCPE-99848Advanced Repetition...Even the glitching!DuplicateMCPE-101028Ocean Monuments Generate IdenticallyDuplicateMCPE-105480Several repeating ravines generated diagonally.DuplicateMCPE-114291The seed 1669320484 generates tons of ravines in a rowDuplicateMCPE-114472Bug Seeds With MineshaftsDuplicateMCPE-117130Same tree appears in specific patternDuplicateMCPE-122208Large oak trees repeat in a diagonal lineDuplicateMCPE-129542Infinite Ravine BugDuplicateMCPE-173808Duplicate Terrain And StructureDuplicateMCPE-181649Some seeds cause the world to generate repeating areasDuplicate
MC-111378
LowAttachments9
- Unresolved
Big_whale_3551- 19
- 13
- Confirmed
- 396139
- Multiple
- Android 8.1.0
1.19.30.21 Preview - 1.21.30.21 Preview
1.19.30.21 Preview 1.16.210.58 Beta 1.16.210.54 Beta 1.16.100.54 Beta 1.16.100.53 Beta 1.16.100.51 Beta 1.16.10 1.16.21 1.16.20 1.16.40 Hotfix 1.16.201 Hotfix 1.16.221 Hotfix 1.18.12 Hotfix 1.18.31 1.19.20 1.20.12 Hotfix 1.21.0.26 Preview 1.20.81 Hotfix 1.21.30.21 Preview
Created Issue:
bug seed 1669320484
this seed:1669320484 infinite loop at specific
Attachments1
- Unresolved
- Open
- Unconfirmed
- Android
- Android 8.1.0
- 1.16.10
this seed:1669320484 infinite loop at specific
at -3439 2148 and 134 54
this seed:1669320484 infinite loop at specific
at -3439 2148 and 134 54
this seed:1669320484 infinite loop at specific
at -3439 ~ 2148
and 134 ~ 54
![[Mod] GoldenHelmet](../../../data/avatars/users/18951.svg){kind=small}
bug seed 1669320484Certain seeds cause features to repeat
this seed:1669320484 infinite loop at specificat -3439 ~ 2148
and 134 ~ 54
Summary
Structures and world features are repeating diagonally.
Steps to Reproduce...
One example of repeating features:
- Create a world with seed 1669320484.
- /tp -3439 99 2148
What I Excepted to Happen Was...
World generation should be random
What Actually Happened Was...
Some world features are repeated in a pattern, examples are small sections of coral reefs that repeat over and over.
Notes
A video has been uploaded that demonstrates the issue far better than I can in text:
This Seed Makes EVERYTHING Repeat... Including Ancient Debris!?Original Description:
this seed:1669320484 infinite loop at specific
at -3439 ~ 2148
and 134 ~ 54
![[MCQA] Kinga Izdebska](../../../data/avatars/users/18949.svg){kind=small}
![[Mod] OcelotOnesie](../../../data/avatars/users/43220.png){kind=small}
is duplicated by
![[Mojang] Mega_Spud (Jay Wells)](../../../data/avatars/users/92696.png){kind=small}
is duplicated by
is duplicated by
relates to
is duplicated by
![[Bot] Arisa](../../../data/avatars/users/43007.png){kind=small}
is duplicated by
is duplicated by
is duplicated by
is duplicated by
![[Mod] Michael Wobst](../../../data/avatars/users/37868.png){kind=small}
relates to
![[Mod] EVGENSYPERPRO](../../../data/avatars/users/92853.png){kind=small}
is duplicated by
is duplicated by
![[Mod] Jarl-Penguin](../../../data/avatars/users/92849.png){kind=small}
Thank you for your report!
We're actually already tracking this issue at MCPE-95011, so I will resolve and link this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
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Thank you for your report!
We're actually already tracking this or a very similar issue at MCPE-95011, so we will resolve and link this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature, to see if the issue has already been mentioned.
Quick Links:
📓 Issue Guidelines – 💬 Mojang Support – 📧 Suggestions – 📖 Minecraft Wiki
Thank you for your report!
We're actually already tracking this issue at MCPE-95011, so I will resolve and link this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki
Duplicate of MCPE-95011
Thank you for your report!
We're actually already tracking this issue at MCPE-95011, so I will resolve and link this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki
Please report only one bug each ticket. The bug with the infinite ravine is MCPE-95011.
Thank you for your report!
We're tracking this issue in MCPE-95011, so this ticket is being resolved and linked as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki
Thank you for your report!
We're tracking this issue in MCPE-95011, so this ticket is being resolved and linked as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki
Thank you for your report!
We're tracking this issue in MCPE-95011, so this ticket is being resolved and linked as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki
The bug
The generation of carvers only appears to use the bottom 48 bits of the world seed, and ignores the top 2^16. As a result, the arrangement of carvers in one world will be shared by another 65,535 worlds, despite noise caves differing.
As it appears that Mojang intended to eliminate such similarities with the fixing of MC-236650, the fact that this remains is likely a bug.
How to reproduce
This can be seen by generating a world with a desired seed, locating a carver-based cave, then generating another world with an integer multiple of 281474976710656 added to the seed and flying to the same location. Assuming that the carver's generation has not been interrupted by another cave, not being underground or some other factor, the basic cave layout should appear identical.
The screenshots provided with this ticket use the seeds 1 and 281474976710657, with coordinates provided.
Expected results
The carvers would appear completely different for all 2^64 seeds.
Actual results
The carvers are a complete match for seeds constructed in this way.
How to fix
Carvers should be made to also respect the upper 16 bits in the world seed as to eliminate duplicate caves like these.
If the carver RNG is redone, it should also be reworked in the same way in Bedrock Edition as to fix MCPE-154323. Such a change could also fix MC-111378 and MCPE-95011.
Further notes
This likely affects world generation as far back as Beta 1.8, and possibly even earlier (in b1.8 to 1.6.4, it affected the entire world like with MC-236650, but from 1.7 onwards only affects carvers and other minor details): https://www.minecraftforum.net/forums/minecraft-java-edition/seeds/2229720-can-two-different-seeds-produce-identical-worlds
Very closely relates to MC-250445. Likely also relates to MC-111378, MC-236650, MCPE-18739, MCPE-95011 and MCPE-154323.
This is specifically the Bedrock Edition equivalent of MC-250445; the differences between these two tickets constitute MCPE-154323.
The bug
Bedrock Edition recently expanded to allow for the main world generation to support 64-bit seeds. However, this only appears to affect the superficial terrain shape and noise caves; it appears that carvers will end up being the same for very many seeds.
How to reproduce
A keen eye can be used to reproduce this on any seed - just create a world with a desired seed, locate a carver cave, then create another world with a seed which has an integer multiple of 4294967296 added to the previous seed and go to those exact coordinates. Assuming that the cave's generation hasn't been interrupted by something like an aquifer, surface terrain or a structure, the cave's basic shape should be identical.
I've specifically opted to use the seed 1669320484, which becomes 5964287780 when 4294967296 is added to it. The choice of this seed is due to the very unique cave generation it results in (MCPE-95011), which makes the similarities between the two seeds incredibly obvious. The weird cave generation is not the focus of this bug report - I'm just using it since it makes the matching caves across different seeds obvious.
Expected results
Cave generation would use all 64 bits of the seed, just like the rest of terrain does.
Actual results
It only uses the lower 32 bits of the seed. As a result, any given carver layout will be shared by another 4,294,967,295 other seeds.
How to fix
Carvers should be made to also respect the upper 32 bits in the world seed as to eliminate duplicate caves like these.
If the carver RNG is redone, it should also be reworked in the same way in Java Edition as to fix MC-250445 and MCPE-154323. Such a change could also fix MC-111378 and MCPE-95011.
Thank you for your report!
We're tracking this issue in MCPE-95011, so this ticket is being resolved and linked as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki
Thank you for your report!
We're tracking this issue in MCPE-95011, so this ticket is being resolved and linked as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support (Technical Issues) – 📧 Microsoft Support (Account Issues)
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki
– I am a bot. This action was performed automatically! The ticket was resolved by one of our moderators, and I left this message to give more information to you.
Please provide the coordinates where the problem occurs. I loaded the seed and did not see it near the world spawn.
I think is c++ algorithm bug
look like the PC JAVA algorithm bug
Structures are Repeating Along a Straight Line.
Summary
Structures are repeating along a straight line.
Steps to Reproduce
What I Excepted to Happen Was...
There was only 1 ravine.
What Actually Happened Was...
Ravines repeated Along a straight line.
Also ibxtoycat made a video about this issue.
Another infinite loop seed just the rival of seed 289849025, wow!
Oh I just noticed some repeating lakes in the seed shared in the description near -175 Y 275
This ravine reaches to the far lands and I have tried it.
@Alec Parungao, Give coordinates and Step to reproduce to reproducing it.
Affecting all dimension, nether, end, and overworld
Thanks for updating this issue.
Affects 1.16.20 and all platforms.
Affecting all versions and multiple.
Affecting 289849025 seeds.
Step to reproduce:
I see. I went to your world and it feels like a ravine going forever and ever until the Far Lands. Note: Affects Bedrock Edition 1.14.31 (I don’t have version 1.16.40 because I have Minecraft: Education Edition)
Confirmed in 1.16.100.54/1.16.100.54 and 1.16.40 (Hotfix). Hopefully this gets patched as a player can indefinitely farm ancient debris from this issue.
This happens on seed 380666697, with the internal generation of ocean monument rooms, all the ocean monuments have identical interiors. Examples are near
X: -8,500 Z: -600
Also had problems in this world with multiple strongholds without portals, as well as the majority of treasure maps being identical.
The same thing was also reported for java and it got resolved as won't fix.
MC-111378I've seen this sort of infinite diagonal generation before with mineshafts, but only in earlier Bedrock editions. The seed reported here also generates infinite diagonal lines of unconnected underground dungeons.
I recommend DO NOT FIX. The seeds that do this are rare, and when it happens it's interesting, and can create an interesting game experience. It doesn't detract from the game at all. It isn't a bug, it's a feature!!
This bug won't be fix due to the fact that this is the result of game limitations. there are a simillar bug in java that they also said that they won't fix
So, would someone resolve this ticket as "won't fix"?
I am not seeing repeating features in 1.18.12 using the seed in the description or one from the comments. Are there any seeds that have this problem in the current version?
THIS ISN'T A BUG, IT'S A FEATURE.
The original seed 1669320484 reported in this ticket still has repeating features, but they are no longer easily visible from the surface. This seed spawns you about 50 blocks away from a couple of endless rows of trees. One such row ends in a village at 274,72,120 in a snowy biome. You can find endless underground canyons; just teleport yourself to -35,21,-355 and to 0,0,-1264.
Another repeating seeds in 1.18.12 is 289849025, which shows evidence of repeating decorations on the small island at 640,*,40. Or fly up to 1000,150,-260 and you'll see rows of uniformly-spaced trees.
For all these seeds, Chunkbase shows canyons and geodes as repeating features. The seed in this ticket description also had repeating dungeons, so the same may still be true.
It's clear that there are still repeating seeds in 1.18.12. So I recommend closing as "won't fix" as has already been done with the corresponding Java Edition ticket
MC-111378. This isn't a bug, and it certainly isn't a problem. The seeds are rare, but interesting.In 1.18.30.
Also seeds 5964287780, 10259255076, 14554222372, etc. (1669320484 + 4294967296 x n)
I think this one can't be fixed. It occurs due to a specific cause in the code, it's cool anyway to have these seeds, so it's better to be in game rather than being removed.
Can confirm, the seed did work for me
Can confirm in preview 1.21.30.21.
Why is this ticket even still open? The corresponding Java ticket
MC-111378was already closed long ago as "won't fix". This one should be resolved accordingly.