[MC-237110] Grass blocks can generate underwater

Grass blocks can be generated underwater.

Enter the following seed and coordinates.

Seed: 7394312107885230768
Coordinates: /execute in minecraft:overworld run tp @s 133.70 61.00 -334.78 -198.75 45.60

❌ → Notice how grass blocks are able to generate underwater.

Grass blocks should not be generated underwater; instead, dirt should be generated.

Attachments

Here's some additional information regarding this issue.

The Bug:

Grass blocks are able to generate underwater.

Steps to Reproduce:

Seed: -23279494138296081
Coordinates: /execute in minecraft:overworld run tp @s -1653.23 60.49 -807.33 110.74 18.83

Expected Behavior:

The expected behavior would be that grass blocks are not able to generate underwater. Instead, dirt should be generated.

Can no longer reproduce in 21w39a with these coordinates, but the bug might still exist. I will look for other examples.

This is significantly rarer in 21w39a, but it still happens.

EnderDonut08 2022-07-14T13:21:47Z

Same happens in mangrove swamps as well as sea grass rendering bug in latest release.

[media][media]

This bug tracker is for the Java Edition of the game, for Bedrock Edition please report this bug to the MCPE project.