Flowing water creates sources in slabs
The bug
When you place a slab directly into flowing water, it creates a new water source in the block, regardless of the hight of the flowing water. Also, the created water can fill a bucket but will be replenished before disappearing. In the attached image, the only source placed with a bucket is the one on the lime concrete. Applies to both top and bottom half slabs of all types.
How to reproduce
- Place a water source that creates flowing water.
- Place a slab in the water, it will turn into a waterlogged source block.
Linked Issues
is duplicated by10
MC-128692Water Duplication (No Not The Classic Trick)DuplicateMC-128721Infinite water using 1 water bucket and 1 slabDuplicateMC-128813Slabs will become waterlogged if next to any water levelDuplicateMC-128823when flowing water touches a slab. it turns it into a water source block and keeps on reapetingDuplicateMC-128826New water source created when water flows toward slabsDuplicateMC-128831Slabs hit by water get waterloggedDuplicateMC-128966when i place ONE water bucket in my world, it flooded the whole downtown. its a water physics bug.DuplicateMC-128988Water source blocks created on half slabsDuplicateMC-129131Flowing water turns slabs to waterlogged slabDuplicateMC-129651water source bugDuplicate
Created Issue:
Flowing water creates sources in half slabs
When you place a slab directly into flowing water, it creates a new water source in the block, regardless of the hight of the flowing water. Also, the created water can fill a bucket but will be replenished before dissapearing. In the attached image, the only source placed with a bucket is the one on the lime concrete. Applies to both top and bottom half slabs of all types.
How to reproduce
- Place a water source that creates flowing water.
- Place a slab in the water, it will turn into a waterlogged source block.
Attachments1
![[Mod] Neko](../../../data/avatars/users/92901.png){kind=small}
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![[Mod] redstonehelper](../../../data/avatars/users/10122.svg){kind=small}
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![[Mod] Michael Wobst](../../../data/avatars/users/37868.png){kind=small}
When you place a slab directly into flowing water, it creates a new water source in the block, regardless of the hight of the flowing water. Also, the created water can fill a bucket but will be replenished before dis
sapearing. In the attached image, the only source placed with a bucket is the one on the lime concrete. Applies to both top and bottom half slabs of all types.How to reproduce
- Place a water source that creates flowing water.
- Place a slab in the water, it will turn into a waterlogged source block.
The bug
When you place a slab directly into flowing water, it creates a new water source in the block, regardless of the hight of the flowing water. Also, the created water can fill a bucket but will be replenished before disappearing. In the attached image, the only source placed with a bucket is the one on the lime concrete. Applies to both top and bottom half slabs of all types.
How to reproduce
- Place a water source that creates flowing water.
- Place a slab in the water, it will turn into a waterlogged source block.
Flowing water creates sources inhalfslabs
is duplicated by
relates to
![[Mojang] Adrian Östergård](../../../data/assets/gravatar/nighter.jpeg){kind=small}
![[Mojang] Nathan Adams](../../../data/assets/gravatar/dinnerbone.png){kind=small}
[Mojang] Nathan Adamsis duplicated by
![[Mod] violine1101](../../../data/avatars/users/92858.png){kind=small}
is duplicated by
is duplicated by
is duplicated by
Also happens with glass panes, iron bars, fences, probably every waterlogged block as long as there is a water block or solid block below it.
I am pretty sure this a duplicate of MC-128700
Thank you for your report!
However, this issue is a Duplicate of MC-128700.
If you have additional information, please add it to that report.
Please search before reporting, as it's likely that one exists already.
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Does MC-128700 describe your issue?
In MC-128700's first screenshot when a slab is made to be a water source block, the water spread four directions around, but in my screenshot it doesn't.
I gotta say, I'm happy it doesn't apply to stairs, otherwise my entire mine would've be flooded.
I have a grid on a creative world made entirely of slabs, and when I accidentally placed a water source and picked it back up, the entire island was flooded.
I can confirm this bug on 18w16a.
I can see where Mojang was going with this, but the repercussions are sever for existing worlds. It is more realistic, and some may want that, but it breaks a lot of things
The new water physics, perhaps, should be settable at creation of the world, and disabled by default for worlds imported from old versions. There are serious implications for a lot of existing designs and worlds just from water being able to flow over slabs, let alone it effectively turning slabs into source blocks.
I think the mechanic needs more nuance if it's going to make it into a release. Either it needs to be configurable if implemented this way, or the mechanic needs to operate like traditional water blocks do and have a flowing water mechanism like there is with full blocks so infinite spread doesn't happen.
It could also be that we've seen the first pass at the mechanic and that Mojang already intended to evolve it over time. Time will tell!
Old worlds will not change until the water gets an update of some sorts.
Also, feature requests go to reddit. (r/minecraftsuggestions)
Also note, that water flowing into slabs that shouldn't create sources creating water sources is not intentional behavior (this exact ticket) and will either change to allow non-sources in slabs, or will change that there won't be sources created when no sources would be created without the slab.
For discussion regarding a bug report, please go to the Mojira reddit (r/mojira).
As explained by Moonbat, If you large floor or roof area covered of half slabs, A water source next to any slab will spread to every slab and become source blocks that can not be removed with sponges. It makes sense if the water spreads, but as flowing water, not as source blocks.
Similar effect happens when water lands on top of a magma block or soul sand, except the source block is created on top of the magma block or soul sand.
It seems this issue is fixed in 18w19 (tested in b): slabs can be individually waterlogged by using a bucket with water on them, but won't get waterlogged from having water flow into them.
The most ideal behavior in my opinion though was how the water behaved around that fence shown in the Update Aquatic trailer, where the water flowed through the fence without waterlogging it, I do hope that water behavior is still in the cards for 1.13.
This no longer occurs in 18w19b. Players are able to create water sources like the normal way (water source diagonally next to a water source; water sources surrounding an empty space) but with a slab now.
Confirmed fixed.
Not fixed.
Neko, in what way isn't it fixed in 18w20? Slabs will no longer be waterlogged from simply having water flow into them, which this issue was about. Beyond this waterlogged slabs seem to follow regular water source block rules identically. Thus I'm not sure what specifically you feel remain broken? I'm asking so that I'll know what to look for in the future.
Can't reproduce, the fix seems to have been good.
reopen please.
Ray, I don't see how your screenshot shows that the bug still happens?
Besides, this ticket is only about slabs, not other waterloggable blocks.
https://gyazo.com/73c61b376571ab84661c801bf1dbab52
Faro said this was the proper bug report for that bug.
That is a different case. There is no flowing water. The behavior you’re describing is intentional; a block can become waterlogged if a water source can be created there.
Ok cool I did not know that. Thank you for the info.
Where is the original bug report? Is there a reason why this is considered normal game mechanic?
MC-130203