[MC-130584] When a structure loads, water sources in the structure spread into waterloggable blocks

Whenever you save and load a structure, any water sources in the structure (including waterlogged blocks) will spread out and fill all adjacent waterloggable blocks.

Linked issues

is duplicated by 14

MC-127644 Waterlogged blocks in structures spread to other waterloggable blocks when loading the structure Resolved

MC-130733 Saving shematics with structure blocks water logs signs Resolved

MC-131959 Structure blocks load previously non-waterlogged blocks as waterlogged Resolved

MC-137346 Waterloggable blocks get automatically waterlogged when loaded by a structure block Resolved

MC-138824 Water spreads to adjacent waterlogged blocks, that then spread to other waterlogged blocks Resolved

9 more links

relates to 2

MC-140270 Spawning a structure with waterloggable blocks next to or inside a water source will waterlog the structure Resolved

MC-141034 taiga_fisher_cottage_1 is filled with water Resolved

testing discovered 1

MC-127679 Squids can spawn in waterlogged blocks Resolved

Attachments

Comments 26

Random Guyson 2018-06-28T17:22:46Z

I can confirm that this does happen, I've had a lot of problems because of it

Irbis 2018-07-06T13:08:11Z

Uploaded screenshot from vanilla structure generation.

Calvin Costic 2018-07-24T01:02:27Z

Still present in 1.13 release. From looking at similar bugs, it seems that if waterloggable blocks are adjacent to water, or other waterlogged blocks, they'll be loaded in as waterlogged. This can create a sort of chain reaction effect where if you have say, a ceiling made of half slabs with even a single block of water above one of them, all the slabs will be loaded waterlogged. Very inconvenient!

Cooper 2018-07-24T01:17:58Z

Yes, since this update makes the water far prettier and we want to build under water bases, and then move them underwater. @Calvin Costic

[Bot] Arisa 2018-08-22T17:46:08Z

Please do not mark unreleased versions as affected.
You don't have access to them yet.

16 more comments

akoimeexx 2018-08-28T17:21:40Z

Can confirm this is still the case for 1.13.1; structures saved with previously non-waterlogged sections next to waterlogged sections are flooded when loaded in from an nbt file. Can provide example nbt file from my experience with it if needed.

carpet0928 2018-09-26T10:24:44Z

This issue relates to BDS-111.

carpet0928 2018-10-19T21:01:27Z

Confirmed for 1.13.2-pre2.

Tom Holtz 2019-03-27T22:44:44Z

This bug has been present in all the 1.13 releases, and still persists in the 1.14 snapshots. Screen capture taken in 19w13a attached above.

Josh Birk 2019-05-18T12:30:39Z

Still persisting 1.14 Preview 2.

ZombieBaby 2019-06-15T15:06:52Z

Still in 1.14.2

Octupus Tea 2019-07-24T13:35:56Z

Can confirm in Release 1.14.4.

Jareth The Rad 2019-08-23T06:48:24Z

I actually found a Woodland Mansion with 3 Anvil rooms side by side and one of them was flooded due to a lake right outside.

Josh Birk 2019-10-31T02:48:16Z

Can confirm issue is still persisting in Release 1.14.4, and testing for 1.15.

Orson Routt 2019-12-22T08:59:18Z

Can confirm issue for Release 1.15.1.

Irbis 2020-02-09T14:50:25Z

20w06a affected

Chomuggaacapri 2020-06-12T03:24:00Z

Having this same issue in 1.16 Pre-release 4.

Jasper Levin 2020-07-05T02:07:22Z

A potential fix that i found was filling the area that will be loaded with the structure with a block that cant be waterlogged (I like to use barriers). Then when you load the structure the barriers will prevent the water spreading and waterlogging the area

mgatland 2020-09-15T10:12:44Z

After investigating, I see this as two separate issues. I have only fixed one of them.

I will update this issue to only describe the issue that was fixed. A moderator may want to reopen one of the duplicates that represents the other issue and ask for a new triage.

The issue that is fixed: When a structure loads, water sources in the structure spread into waterloggable blocks

The issue that is not fixed: When a structure is placed in water, water sources outside the structure spread into waterloggable blocks. (For example, when a shipwreck generates under water, its trapdoors become waterlogged.)

There was an example of the second case in the description. I removed it but it's here if you want to copy it to a new issue:

Example of it happening with vanilla structure generation:
seed: mansiontest
coords -18490 69 -3374

user-39d6c 2020-09-15T12:37:51Z

It's finally getting fixed. Thank you Matthew

Carlos G. 2020-09-15T18:56:03Z

Finally saving in the future with Data Packs those Taiga Decorations that required water in the inside so it didn’t become “Villager traps”. Probably this fix includes an indirect fix for another more common vanilla example that happened in a Village house due to this water spreading problem MC-141034

marcono1234 2020-09-19T12:16:10Z

MC-140270 has been reopened to describe the case where existing water sources spread inside the loaded structure; i.e. the case which will not be fixed by this fix for this issue.

Tom Holtz 2020-09-19T12:52:55Z

Really glad to see this getting fixed. Good call splitting the two issues.

KirbAvion 2022-03-02T22:43:34Z

I'm still getting this in random spots of custom and modified vanilla structures in 1.18.2.

user-f2760 2022-03-02T23:42:28Z

You sure you don't experience MC-140270?

KirbAvion 2022-03-03T01:41:47Z

Nope, I've got structures spawning thirty blocks in the air with no water around except for what generates with the structure. See attached for water spreading from a two-block water feature along the full length of the structure.

[media]