mojira.dev
MC-219200

Lush Cave decorator is different each time ignoring the world seed

The bug

While trying to reproduce a bug for another bug report I haven't made yet I have discovered a weird occurrence. Every time I generate this world with the same settings it looks slightly different.

Edit: This doesn't only affect this world, this affects every world and it also affects every chunk of every world.
Basically the lush caves decorator isn't seed related resulting in you getting different world every time.

How to reproduce

Create a singlebiome lush caves world with seed -8508883206669806165
Go to: /execute in minecraft:overworld run tp @s -26.34 -36.86 171.23 -482.09 41.75
The area looks like this:

[media]

Now exit to menu and recreate the world without changing any settings
The area now looks like this:

[media]

Repeat the step from Step 1 (create a new world with lush caves single biome and the same seed)

The area now looks like this:

[media]

Now recreate this world
This time the area looks like this:

[media]

As you can see each time this area looks very different.

It's so inconsistent I cannot predict if you will be able to reproduce exactly the same worlds I did

Basically only the shape of the cave stays the same and the decoration generation is entirely different each time.

Linked issues

Attachments

Comments

migrated

Seems like a duplicate of MC-55596.

Ceresjanin123

Nope that affect only certain chunks.
Here every single chunk is affected but only affects the lush caves biome and is much more noticable.
It also happens in all seeds.

I wouldn't say its a duplicate but it is related

wobst.michael

Can confirm. Ran into this while trying to reproduce other issues.

ampolive

Can confirm in 1.17.1 Release Candidate 2, using a single biome world. Used the same seed, but a different command:

/execute in minecraft:overworld run tp @s -150.06 33.22 72.36 -102.09 41.75

due to the reverted change to world height.

Ceresjanin123

Can also confirm this still happens as of 1.18 Exp-snapshot 3

ampolive

@unknown Thanks, but the 1.18 experimental snapshots are not supported in the bug tracker.

ampolive

Can confirm in 21w37a.

gaspoweredpick

This also happens with large azalea trees, which can negatively impact gameplay by changing where you can locate a lush cave on the same seed.

Ceresjanin123

Can confirm in 21w38a

ampolive

Can confirm in 21w39a.

Moesh

Dupe of MC-55596

Ceresjanin123

This is NOT a dupe of MC-55596, this is caused by something different also this causes the entire lush caves to be different not just a few select chunks

ampolive

If anything, this is a duplicate of MC-238073.

Ceresjanin123

I think this isn't a duplicate of either because MC-219200 started happening way before MC-238073 so they prob have different causes and have to be fixed separately

violine1101

I've now re-resolved this as a duplicate of MC-238073. As far as I can tell it should be the same issue, but the impact is bigger in 21w37a. And since MC-238073 got higher priority it should be the parent ticket from now on.

For future reference, see also reddit discussion https://www.reddit.com/r/Mojira/comments/q23as5/mc238073_and_mc219200_should_be_reopenedwere/

Ceresjanin123

MC-238073 was fixed and MC-219200 still occurs, as I expected this is a different issue please reopen

Ceresjanin123

(Unassigned)

Confirmed

Platform

Normal

World generation

21w10a, 1.17.1, 21w37a, 21w38a, 21w39a, ..., 1.21.1, 24w36a, 1.21.2 Pre-Release 3, 1.21.3, 1.21.4

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