[MC-236613] Overworld surface blocks (grass, sand, snow, mud) are sometimes generated underground in caves

The bug

Grass is generated in noise caves.

How to reproduce

❌ You will find grass blocks in noise caves.

Linked issues

14 more links

confirmed

Not specific to just oceans and rivers, grass generates underground in every biome.

This is a very long bug in 1.18 and i can confirm it

For the snow under the mountains it look kinda cool NGL.

Can confirm this behavior in 21w38a.

17 more comments

Can confirm in 22w15a. This also now affects mud.

[media]

Version: 22w15a

Seed: -4206205933034095720
Coordinates: /execute in minecraft:overworld run tp @s 8483.36 39.90 -3670.90 -1928.61 -15.45

In 22w16a

-3583889037144459814

/execute in minecraft:overworld run tp @s -944.24 69.94 -1010.96 -1394.29 13.02

Can confirm in 1.19.1.

Version: 1.19.1

Seed: -8413791146211211132
Coordinates: /execute in minecraft:overworld run tp @s 212.87 30.00 212.01 286.93 -18.15

Can confirm in 24w19b:

5418616608087677368

/tp 210 52 -1975

I can recall this being stated by Henrik Kniberg as intended during the development of 1.18.