[MC-125033] Old cave and ravine generation gets cut off unnaturally on chunk borders near water

Very related to MC-124988. See attached screenshots.

Examples

Caves

Examples on seed

7913388302499728605

/tp @p 1256 70 11127
/tp @p 1060 72 11175
/tp @p 739 74 9251
/tp @p 1133 67 9522
/tp @p 852 38 18707 (underground example)
/tp @p 781 43 18699 (also underground)

-8590338427130770590
/teleport -176.00 63.19 156.49

Ravines

6042461418960263782
/teleport -163 65 -90

Linked issues

is duplicated by 8

MC-134583 Chunk glitch on this beach Resolved

MC-148665 Noise Generator bugs Resolved

MC-156885 World generation sometimes stops at chunk borders Resolved

MC-158097 Several chunks generating filled up / Caves "cut off" at chunk borders Resolved

MC-172944 Cave cut at chunk border Resolved

3 more links

relates to 5

MC-154393 Flooded caves and trenches get cut off on chunk boundaries near land for no reason Resolved

MC-126133 Undercover ravines sometimes generate cut off at chunk borders Resolved

MC-167213 Water Caves Don't Generate Through Land Biomes Resolved

MC-216448 River generates over a ravine Resolved

MC-216952 Some chunks interrupting with cave systems filled with blocks Resolved

Attachments

Screen Shot 2021-03-29 at 9.03.33 AM.png

Comments 27

marcono1234 2018-02-11T21:05:57Z

Apparently affects ravines as well.

[Mod] redstonehelper 2018-02-21T16:14:41Z

18w08a example (in case the old ones no longer work): /tp @p -3124 80 3156, 6681878277208838608.

[Mod] Neko 2018-07-22T20:44:17Z

1.13 example:

Seed: 5203146265350693241

/execute in overworld run tp @s 88.80 67.08 -9.63 121.93 34.73

Oval 2018-09-24T01:57:30Z

Confirmed for 1.13.1.

Sam Frewer 2019-05-12T19:38:09Z

[media]

Discovered an instance of this in 1.14.1 pre-release 2

Seed: -2998127435321252675

Coordinates: X: -58 | Z: 546

17 more comments

Nixinova 2019-08-29T07:44:16Z

Another example: Seed: -3070852984194394850, coords -200/60/160

Nixinova 2019-12-14T04:08:36Z

Still in 1.15

KingSheepMC 2020-03-13T21:08:44Z

I can still produce the bug in the snapshot 20w11a and all of 1.15+ releases.
It's annoying.
This bug is not on Bedrock.

[media]

KingSheepMC 2020-03-19T18:16:42Z

affects 20w12a

KingSheepMC 2020-03-25T19:01:05Z

Caves are still weird in 20w13a, indicating this version is affected.

KingSheepMC 2020-04-03T20:16:45Z

20w14a - affected

KingSheepMC 2020-04-08T14:44:35Z

20w15a has this problem

bugi74 2020-04-08T15:24:05Z

See MC-411. Duplicate or at least related to. EDIT: note: its state of "invalid" is basically a forgotten state, it should have been reopened for proper evaluation.

ralokt 2020-06-23T09:31:50Z

[media]

Still affects 1.16pre1

Seed: 8470219322699000237
Approximate coordinates in screenshot: -47, 75, -18

pulpetti 2020-07-21T23:58:38Z

Confirmed in 20w29a

Avoma 2021-01-03T18:09:30Z

Can confirm in 20w51a. Here's an example with a ravine.

Seed: -6178286686098098179
Coordinates: /execute in minecraft:overworld run tp @p -72 68 -1717 90 50

Avoma 2021-01-12T11:08:18Z

Here's one with an underwater ravine:

Seed: -5436467103508185805
Coordinates: /execute in minecraft:overworld run tp @s 432153.00 44.35 466.82 -322.57 48.99

Avoma 2021-02-04T17:36:53Z

Can confirm in 21w05a.

Brevort 2021-04-17T22:35:49Z

Definitely worse in 21w15a than 21w05b.

KingSheepMC 2021-05-05T17:44:54Z

Unfortunately this bug wasn't fixed in 21w18a.

user-68c81 2021-05-05T18:03:26Z

Can confirm in 21w18a with Avoma's first seed.

jacobsjo 2021-05-05T23:06:09Z

Caves being cut of seems to have happened because of 2 different causes:

Because the biome of the chunk where it was supposed to generate in didn't have that carver enabled (rivers don't have any carver enabled). This is the main cause that this issue is reporting and has indeed been fixed in 21w18a.
Because the maximum distance from the starting chunk has been reached. This has nothing to do with the existence of water. The first example by Avoma (-6178286686098098179 at -72 68 -1717) has this issue (there is no water biome anywhere that could cause this cut-off). This hasn't been fixed but isn't what this issue is reporting.

user-68c81 2021-05-06T04:54:39Z

I don't think there is a distinction between "water biomes" and the other ones. You can turn any biome into an ocean with a datapack by simply changing the depth parameter. When a biome has terrain below y=63, it will always get flooded, which is why you can still find lakes in deserts (MC-72831) or other low biomes.

I think the caves check for water blocks in some places, but they seem to "miss" if the water patches are too small, causing MC-132285.

Rexmanx 2021-05-06T09:02:13Z

Can confirm still in 21w18a, despite labeled as fixed.

clamlol 2021-06-08T19:21:08Z

[media]

Confirmed in 1.17.

wobst.michael 2021-09-24T15:48:45Z

Can this still be seen in 21w38a?

clamlol 2021-10-07T23:21:31Z

I couldn't reproduce this in 21w40a, although obviously I wasn't able to check the areas from prior reports due to the biomes being enlarged in this snapshot.