[MC-225344] Cave generation seems to be broken at seemingly random chunk borders

Cave generation seems to be broken

I've never seen this in 21w18a

Linked issues

is duplicated by 12

MC-225401 Ravines and caves on the ocean floor generate broken up and with weird one-block wide strips Resolved

MC-225989 Weird chunk squares appearing in oceans Resolved

MC-226153 Oceanic Trenches at Border of Chunk Generated Incorrectly Resolved

MC-226203 Strange Abandon Mineshaft generation in and around water logged caves Resolved

MC-226447 Underwater ravine world generation bug Resolved

7 more links

relates to 2

MC-223227 Floating water caves in caves under the ocean Resolved

MC-227228 Cave generation peculiarities along chunk borders under oceans and beaches Resolved

Attachments

Comments 13

user-aa418 2021-05-12T12:36:39Z

Can confirm

[media]

Sebexan 2021-05-19T19:09:41Z

I can confirm for 21w20a

Sebexan 2021-05-27T13:50:42Z

I can confirm for 1.17 Pre-release 1

Isaac Rios 2021-05-27T21:25:17Z

Confirmed for 1.17 Pre release 1

Edit: Forgot to attach seed: -7573769822904852349

[media]

Topher Donovan 2021-05-27T23:59:35Z

[media]

Attached a screenshot of the error in a forest biome.

Seed: 2141519423403999074

3 more comments

clamlol 2021-06-01T01:34:27Z

Confirmed in 1.17pre2.

clamlol 2021-06-01T22:18:55Z

[media]

It seems like this issue was fixed in 1.17pre3 under oceans but still happens occasionally under beaches. Might be that an edge case wasn't addressed in the original fix. This should probably be reopened or split into a new issue for beaches.

mgatland 2021-06-02T09:52:50Z

Please raise a new issue with the repro steps from @unknown's post and mark that it 'relates to' this one : )

clamlol 2021-06-03T00:36:38Z

Aite I made MC-227228. Turns out the buggy caves in my screenshot are in 1.16.5 too so there's a chance it's an unrelated issue, but a "relates to" link would probably be a good idea all the same.

clamlol 2021-06-03T01:15:08Z

The more I fly around in 1.16.5 the more I notice that ocean ravines seem to be offset by a block or two at every chunk border (MC-126133?). It could be that some underlying issue was exacerbated during the 1.17 snapshots and that led to this issue. I included links to all related issues in MC-227228.