[MC-238899] Caves and ravines near the nether roof have flat ceilings

The Bug:

Near the top of the nether at y level 121, cave carvers always get cut off, resulting in caves and ravines having flat ceilings.

Here is an example:

Version: 1.19.3

Seed: 1692907036
Coordinates: /execute in minecraft:the_nether run tp @s -207.04 114.23 412.72 105.38 -46.64

Steps to Reproduce:

Generate a world with the seed provided above and teleport to the given coordinates.
Look closely at the ceiling of the cave/ravine.
Take note as to whether or not caves and ravines near the nether roof have flat ceilings.

Observed Behavior:

Caves and ravines near the nether roof have flat ceilings.

Expected Behavior:

Caves and ravines near the nether roof would not have flat ceilings.

Linked issues

duplicates

MC-129569 Nether ravines and caves that generate near the nether ceiling get cut off instead of generating up to the bedrock layer

Attachments

Comments

migrated 2021-10-17T02:22:42Z

Can confirm.

Also, kind of unrelated, they appear to generate in different places as before, since I created the same seed and went to the nether both in 1.17.1 and 21w41a and there were caves in the snapshot where in the release there weren't any

migrated 2021-10-21T17:22:26Z

Affects 21w42a

migrated 2021-11-11T19:53:08Z

Affects 1.18 Pre-1

migrated 2021-11-22T18:33:38Z

Affects 1.18 Pre-6

Avoma 2022-06-08T18:07:39Z

Can confirm in 1.19.

[media]

Version: 1.19

Seed: -7904429713016255202
Coordinates: /execute in minecraft:the_nether run tp @s 36.45 109.84 84.07 -109.60 -44.19

Avoma 2023-07-30T09:27:50Z

This ticket is actually a duplicate of MC-129569.