[MC-236652] Weather can sometimes be incorrect within a biome

The Bug

The weather can be incorrect in biomes sometimes.

Examples

It can snow in Jungles

It can rain in Snowcapped Peaks as seen from MC-236854

Reproduce

Go to

Seed: -8330603083619589917
Coordinates: /tp @s -2108 94 -298

Do /weather rain
❌ Notice that it is snowing in a forest biome

Expected Result

The weather would correspond to the biome i.e. rain in Jungles and snow in Snowcapped Peaks

Linked issues

relates to

MC-257570 Exposed cave biomes cause issues with rain near dry or snowy biomes

Attachments

MC-236652.mp4

Comments

syarumi 2021-09-15T20:37:50Z

Not invalid, this is a new issue caused by MC-236619 (kind of). Attached some screenshot on the seed: -8330603083619589917.

Seems like weather doesn't work correctly with 3D biomes.

IllagerCaptain 2021-09-15T20:41:23Z

I don't think this should be Invalid, as jungles are not suppose to have snow below y=256. So I am pretty sure this is a bug, not a feature request.

ampolive 2021-09-15T21:21:49Z

Can confirm.

migrated 2021-09-17T11:30:57Z

@unknown, they are not supposed to have snow above Y=256 up to Y=540 or something.
Either way, I'd agree that this is a bug.

migrated 2021-09-19T03:42:17Z

Can confirm. There is also an issue in areas where it does not rain but is supposed to wherein particles generate on the floor with no raindrops and vice versa. I even found a border between rain and no rain in the same biome, but could not locate any major value change that indicates what causes this.

Ceresjanin123 2021-10-07T20:39:33Z

cannot reproduce in 21w40a

anthony cicinelli 2021-10-07T20:40:32Z

I also cannot reproduce appears fixed in 21w40a

syarumi 2021-10-07T20:49:24Z

I recommend to still not close this issue, this might be still happening in cave biomes, and also could have issues with custom 3d biomes.

Ceresjanin123 2021-10-08T04:40:54Z

true Chava

[Mod] Neko 2021-10-08T07:21:10Z

Not fixed. It still rains in dry biomes when there is a cave biome beneath.

Seed: 3135233111757670245

/execute in minecraft:overworld run tp @s 1972.77 67.00 1021.51 449.88 8.26

In the above example, it rains in the savanna because there is a dripstone cave below.

Ceresjanin123 2021-10-08T13:46:18Z

whoops sorry

Ceresjanin123 2021-10-25T17:08:24Z

This was fixed in 21w41a (for real this time)

Moesh 2021-10-28T09:54:43Z

Is this still an issue in the latest snapshot?

syarumi 2021-10-29T05:21:11Z

Not quite fixed, still happens with cave biomes in default worlds. As you can see on the images, there's still some quirkiness when a dripstone cave is exposed to the sky, making the weather incorrect in snowy plains, but if blocks are placed on this biome the weather remains correct again. Not to mention this could mess up with custom biomes on the sky.

The expected here would be the weather to change exactly at the biome edge, or else give priority to the highest biome.

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