does the newest version work with old save? Or I have to create new save for it?

Realistic Water 0.3.2 seems to have broken Primitive Survival furrows, water flows through the initial furrows at the start but peeters off, they don't appear to be water sources anymore.

I'm getting the same errors as metasynthie. At first I thought it was from Watersheds. But after testing with and without Realistic Water the errors only appear with it active. 

14.8.2026 00:16:18 [Error] Exception: Object reference not set to an instance of an object.
   at Vintagestory.GameContent.BlockBehaviorFiniteSpreadingLiquid.GetFallingLiquidBlockId(Block ourBlock, IWorldAccessor world) in VSSurvivalMod\BlockBehavior\BehaviorFiniteSpreadingLiquid.cs:line 853
   at Vintagestory.GameContent.BlockBehaviorFiniteSpreadingLiquid.TrySpreadDownwards(IWorldAccessor world, Block ourSolid, Block ourBlock, BlockPos pos) in VSSurvivalMod\BlockBehavior\BehaviorFiniteSpreadingLiquid.cs:line 453
   at Vintagestory.GameContent.BlockBehaviorFiniteSpreadingLiquid.SpreadAndUpdateLiquidLevels(IWorldAccessor world, BlockPos pos) in VSSurvivalMod\BlockBehavior\BehaviorFiniteSpreadingLiquid.cs:line 325
   at Vintagestory.GameContent.BlockBehaviorFiniteSpreadingLiquid.OnDelayedWaterUpdateCheck(IWorldAccessor world, BlockPos pos, Single dt) in VSSurvivalMod\BlockBehavior\BehaviorFiniteSpreadingLiquid.cs:line 172
   at Vintagestory.Common.EventManager.TriggerGameTick(Int64 ellapsedMilliseconds, IWorldAccessor world) in VintagestoryLib\Common\EventManager.cs:line 196
   at Vintagestory.Server.ServerMain.Process() in VintagestoryLib\Server\ServerMain.cs:line 883

14.8.2026 00:16:18 [Error] Exception: Object reference not set to an instance of an object.
   at Vintagestory.GameContent.BlockBehaviorFiniteSpreadingLiquid.GetFallingLiquidBlockId(Block ourBlock, IWorldAccessor world) in VSSurvivalMod\BlockBehavior\BehaviorFiniteSpreadingLiquid.cs:line 853
   at Vintagestory.GameContent.BlockBehaviorFiniteSpreadingLiquid.TrySpreadDownwards(IWorldAccessor world, Block ourSolid, Block ourBlock, BlockPos pos) in VSSurvivalMod\BlockBehavior\BehaviorFiniteSpreadingLiquid.cs:line 453
   at Vintagestory.GameContent.BlockBehaviorFiniteSpreadingLiquid.SpreadAndUpdateLiquidLevels(IWorldAccessor world, BlockPos pos) in VSSurvivalMod\BlockBehavior\BehaviorFiniteSpreadingLiquid.cs:line 325
   at Vintagestory.GameContent.BlockBehaviorFiniteSpreadingLiquid.OnDelayedWaterUpdateCheck(IWorldAccessor world, BlockPos pos, Single dt) in VSSurvivalMod\BlockBehavior\BehaviorFiniteSpreadingLiquid.cs:line 172
   at Vintagestory.Common.EventManager.TriggerGameTick(Int64 ellapsedMilliseconds, IWorldAccessor world) in VintagestoryLib\Common\EventManager.cs:line 196
   at Vintagestory.Server.ServerMain.Process() in VintagestoryLib\Server\ServerMain.cs:line 883

If i have this mod installed and want to remove it, is there a command, or anything, that i could use to disable the mod and remove the modded blocks that it places? To avoid the endless "?" blocks?

Hey Blondie, thank you for making the mod :D

Can I ask a favor? I'm not having any luck with the water well (the one you can make with a shovel) in Hydrate or Diedrate. Water never appears, even though it says I should get over 20L of fresh well water daily. I see in the comments they should be compatible, but I'm wondering if this part was overlooked? I don't know if I should be making this post on here or on HoD's page ^^"

I just noticed that if you dam up a flooded zone from the source any blocks underneath the previously flooded area spawn a source block when removed

Hmm... I wonder if it could be possible to completely disregard water sources, and instead somehow make rain able to place down slight amounts of water? Water that is on the ground would slowly evaporate, while lakes would accumulate it until they flood (which would lead the excess water onto the ground), and the ocean would simply remove it (along with being able to flood any canals/caves connected to them). Though I guess it would require a whole rework of water :P

Accidentally flooded my base by creating a 2 block wide gap. Cant unflood it because it keeps creating new water blocks.

Lake extension should be off by default :(

How do you remove this mod from a world? I just realised that it's not needed in the modpack i was using, and after removing it it left a bunch of absolutely indestructible blocks in place of flowing water.

So, the "still" water this mod waterflows create are not actually full water blocks/source blocks and therefore arent actually compatible with "hydrate or diedrate", right? at least, thats how it plays out in my game

does this work with the rivers mod?

I'm getting a lot of these error messages, and although I don't see a mod mentioned it's about water spread, so I figured I should check with this page to see if it might be related to or affecting Realistic Water spread!

does this mean if I dig up from a cave into a lake, the whole lake disappears into the cave? oh my god

i had an issue with water and chiseled blocks, now my map looks ugly, as it disturbed grass

Placing blocks to try and expand a perimeter around an overflowing stream is creating new source blocks at the outer edges. I have a nightmare situation going where new source blocks are generated as I try to fence in a stream, unless I head off the growth by building a stop point, it just keeps filling empty spaces with sources. I'm going to have to roll back my server to before I placed any blocks near the natural stream and uninstall until there's some reduction in source block generation.

Smetimes water is impossible to contain. Why placing blocks beside or under water makes new source blocks? Now I have water magicaly raising in the middle of a river and flowing horizontaly out of waterfall because I tried building a bridge. I guess it is lake extension fault and can be disabled but I wish I know it sooner.

Hello. I've encountered some strange behavior with the latest version when using it with the waterwheel system from the Medieval Expansion mod. Although no error message appears in the log or any clear indication of the problem, when using the mod's sluice gate system, it generates static water that never disappears. This doesn't happen with version 0.2.2. I'm sorry I can't provide a more specific example.

Are there any river mods that work well with this mod? I.e. rivers that are made of flowing water blocks and therefore allow redirection.

The latest update is causing an issue with the "True Archimedes Screw" and "Aqueducts and Sluices", when the mod is installed, the water from the Archimedes screw does not flow properly into an aqueduct.

It gets stuck in the first block, removing Realistic Water solves the issue.

Hi i wanted to remove your mod due a problem with IME (intresting mining and extraction) but i got many unremovable Question-Mark (unmapped) Blocks. Is there a save way to remove your mod? or maybe a way to get it to work with IME? Thanks in advance!
(ah! the probleme is that slucing doesn't seam to work in the realistic water blocks, almost forgot to mention)

As of the latest 1.2.3 version Waterfall: SomeLiquidSourceTransport is now compatible with realistic water since there were some issues with it.

Lovely update

Is there a way to use only the portion of the mod that makes lakes/water extend if you remove an adjecent block?
I kinda really like that part but im not too keen on watesheds mod spilling out of controll everywhere, i kinda would love just to be able to have flat water surfaces stayy filled when adjecent blocks are removed (like from instability or if i remove it)

The game instantly crashes without bringing up the crash report dialog (or writing any evidence to client or server logs) using this mod when a water source block comes into contact with one of Paddy Fields' modded rice paddy blocks. The bug only started when I added this mod to my game.

Hey everyone, version 0.3.0 is out.

This is a substantial update with many bugfixes and improvements, there is now a configuration file with two options:

MaxPathDistance controls how hard the pathfinder tries to find downpaths (Swedneck you might want to increase it :P)

AllowLakeExtension allows to disable the generation of source blocks when digging at the border of a lake (Dovinya might want to disable it)

For Dekoser it should be easier to create sluices now

Hiya, is there a way to cleanly uninstall the mod without debug blocks showing up? I wanted this mod on my world but it appear that afer breaking a single bock of a lake near the ocean everything turned into source blocks and that is not something I want happening if I can't fix it by damming it off

So is it just an adjustment of the distance water will flow from it's source, or is there some other changes made here? I want to understand it more on a technical level. 

Hi theblondie. I love your mod. I've found some incompatibilities with certain mods. I've already created a patch for all of them, and if you share your Discord username, we can talk privately and I'll send you the code and all the instructions so you can safely include it in your patch. I've searched for you, but I haven't found a username I'm sure is you. I look forward to your reply. Cheers!

what's the name of the config for the mod? I only see watersheds in my modconfig folder and nothing to do with realistic water. was hoping to disable new water sources with buckets.

This is very cool, but I can't help but think it needs some more polish before I'd want to use it in a real world. Particularly the way it seems like it prefers to spread laterally instead of downhill, actively spreading past a slope to continue across a flat plane, which is just not how water works realistically.

I've fluffed up and accidentally placed a bucket of water down in the barn which has flooded the whole area, is there anything I can do to get rid of all the water?

oh man, creating a sluice is a challenge for sure ~ trying to create a continues moving stream comming from multiple points and merging without getting a point were the flow isnt moving items downstream while maintaining a reasonable footprint, quite a duzi
but i see the end at the tunnel, symetricall merger and trapdoors seems to be the key. (for muck-transport)

i noticed that when modwater hits a vanilla source (eg. pond) and then the modwater is stoped from the source, it can happen that the pond is now flowing strangly like there are now sourceblocks missing, like they were replaced and left holes
have to study it further myself to make a better report tho

soo, good job ~

Since the last update, my rivers and watersheds are leaking a lot 😂

I like the idea behind this mod, especially being able to dig channels. The only thing that bothers me is the fact that a very small pond of source blocks is able to entirely flood a mountain side without ever empty 😅
But I'm not sure there would be an easy solution to that (except maybe compute a max spread based on the amount of source blocks available...)

Also I wondered (and actually I had the same question about Hardcore Water) if it would be doable, when a manually digged channel ends up in an enclosed bassin to fill it with source blocks.

Is this mod different from the Hardcore Water mods? Or does it have more or fewer features?

Can we get an option to make buckets not able to put source blocks kinda like how waterfall does it because something I noticed is that when you play with the vanilla no source block setting and this mod sometimes when running water hits existing water it makes a bunch of currents and I can't fix it unless I allow source block placement 

Please add a way to remove this mod from an existing game.

Hey hey, love your mod!

Running into a tiny issue, however. The furrows from Primitive Survival don't seem to really want to 'fill' like they used to; I can have water right next to a furrow and have it not update after it's had a stick develop in it. I can turn those off, but I'd prefer to leave them on - just a heads up.

i don't know why i thought it was using normal water blocks to function.  removed the mod because some of the giant messes this can cause in normal world generation but .. a sea of ? blocks lol.  i get it, makes sense.

After updating a lot of water blocks became missing (the ? blocks). Any idea how to fix them? They're unbreakable

Hey, if moving water caused the blocks it flows over to slip using sideways instablity, these rivlets would be able to sort of carve a riverbed when flowing down steap embankments, just using in game mechanics.

I love the way this mod works, buuuutttt (there's always a but) I noticied it only affects freshwater.  So, hypothetically, if I were to build a castle on the coast then dig a moat from the ocean around the castle, the saltwater still has Vanilla behavior.  It's like there isn't enough water in the sea to fill a dry little ditch!  Also, playing with buckets transporting water sources turned off for immersion.

Was this intentional?  Like it creates a conflict when fresh and salt water flow into eachother?

Hey if you're looking for art for the cover, I'd be happy to make you something. I've been wanting a mod like this for ages. I'm not a professional ilistrator, but I can do a decent wood-cut style image. 

"There is basically no fps impact as the calculations are performed outside of the graphics thread."

That's not how a game's frame rate works...

I'm still getting pretty excessive water spread. Having a limit to the angle water can spread at would help a lot, making it actually feel like it's flowing with some momentum rather than just gently spreading out. 

Is there any way this mod can just move the water sources from high areas to low ones? I really like the idea of this mod but it still can create infinite water very easily in some ways more easily and in much less desirable ways i.e. flooding. If the water was just relocated, flooding could be reversed and water would become an actual finite resource. 

If you're worried about mods like watersheds that place water in open areas you could make the water have stability like sand so it only empties from the edges or unsupported areas. 

I have no idea if this is even possible for your mod or if this even sounds interesting to you. But I'm hoping so, as it seems in line with the objective of this mod. I dont know anything about coding so forgive me if im asking the impossible. This mod is already amazing and adds so much to the game as is, thank you!

Hey hey, love this mod, unfortunately we had to remove it due to massive floods - now we have lots of water blocks that can't resolve, be removed, or interacted with in any way (show up as white with red question marks, can't be deleted or replaced even in creative mode). I'm happy to reinstall to fix it, but just wanted to give you an FYI.

Is there any way to drain areas? in some places the endless lakes are making it difficult. If I accidentally break a block in the wrong place in the wall, then I lose the entire area that is lower than the lake because it flods with source blocks. I can dry it up by placing dirt each block at a time, but it is very time consuming.  I wish there was a way to do like the sponge in that other block game.   I love the idea of single-wide channels not creating source blocks so that at least some accidents could be prevented.

theblondie Is it possible to disable the creation/expansion of lakes using a config? Is it possible to check the connection between two sources? It's just that in flat landscapes, endless lakes form due to the fashion...

Incredible, thanks for making and sharing it! <3

theblondie video:

https://drive.google.com/file/d/1DwUOv8D3PbcrhcfAyUBYnYoFEtmIVssK/view?usp=sharing

Heyhey! Thanks for this really nice mod! I tested it yesterday together with Rivers and Watersheds and it works fine and fits right in. I think there's some overlap and some differences between Realistic Water and Watersheds which might fill in each others gaps. Wrote that into the Watersheds Discord as well ;)

Speaking of which: I've seen there isn't a discord thread for Realistic Water yet. You might want to take a look into that. Seems like a very quick and accessible way to get feedback from the community.
Also I've took a bunch of screenshots I wanted to show you; It probably wasn't what you had in mind with the mod but in conjunction with Wilderlands Caves I've got a multilevel underground riversystem with waterfalls in between levels going. I explored it in creative and it was absolutely stunning. To explore something like that in survival must be awesome! Wanted to post some pictures of the underground river system on the discord, but well there's none yet :P

Lastly I've had Terrain Slabs active while playing around with Realistic Water and I hadn't too much issues with flooding but I think that's very dependened on the overall terrain/worldgen.

Cheers!

Try using it with https://mods.vintagestory.at/algernonswatersheds
You'll notice that several water springs start but don't spread, stopping abruptly without finding a shallow point or a water source like lakes, etc.

it seems this mod is a bit incompatible with terrain slabs. When water passes through the semi-block, it creates an endless source, which is why the regions are filled with water without the possibility of drainage...

This is such a cool idea, I'm excited to give it a try!

Would you consider sharing the code somewhere (e.g. github)? I'm really curious to see the details of how you implemented it :)

theblondie Great mod. I've really enjoyed playing with it to create canals and irrigation for crops.

If its not too much trouble, I do have one suggestion. Is it possible to add a config option to prevent the water spreading from rivulets? My experience is that they spawn so often in mountainous regions that the flooding gets too intense.

Is this based on the Hardcore Water mod's aqueducts?

Hey, I tested version 1.1.0 on my server, updating from 1.0, and the performance tanked a lot. ticks were taking 1s at some cases

Can you confirm and update the description etc. if is this safe to install Mid-game or need a new save?

Installed mid-game and current water flowing from mountains were acting as mod intends. 
Or even say how compatible this is with some other water mods perhaps?

Great idea otherwise, love the concept

Wondered if that was the key player. Thanks for the quick response!

Regardless of AI generated (maybe translated?) comment, I do agree with Mercar and Swedneck. Even with riverbeds and basins a single rivulet will happily flood a hill on the way down and is not nearly limited enough in that regard. Only happens sometimes, but it's consistent with the type of hill shown in the image, both with and without a cliff below. Also note on the leftmost edge the rectangular gaps in water propogation (might be hard to fix, I'm not too familiar myself with how you developed this). Same thing happens on the rightmost peninsula. 

Really dig the mod otherwise. I do like having floodplains, it just seems extremely aggressive sometimes, and I think terrain slabs might exacerbate that issue alongside algernon's.

So after playing around with this a bit i think the spread is very overenthusiastic, a single source block can turn into a massive lake and having more source blocks at the.. source.. makes no difference.  
Ideally there should be a system where spread scales with the number of sources (thus modeling increased flow); but in case that's difficult to implement i'd at least lower how far water can spread on a flat surface and maybe instead increase how far it can spread per each block it descends, so you don't get the excessively enormous wetlands 

Also i can confirm that single source blocks on a flat surface will create new source blocks and thus potentially literally infinite water, which.. might explain why the spread feels overenthusiastic. And yes i tried this with source transport turned off in the world config.

Is there any way to config the spread max distance, im using Watersheds and sometimes water blocks spawn outside of the river bed and spread over huge distances literaly flooding all surroundings. While these effects look cool there a re quite performance intensive 

I've played around with the mod for a bit, and I think the source block mechanic should be improved a bit. If you pour water on a cliff near a hilly area/forest, you'll end up with a huge wetland. Now, that's not an issue per se, but it appears that the edges of a wetland have these unrealistic and ugly edges where the water just ends. Furthermore, if you cut off the source, then most of the water will drain, but you'll still have some patches of water that just start from nowhere, like this:

I think introducing a mechanic where water dries up at the edges if it can't find a block to rest against or water bordering it would improve the situation.

So, for example:

The water (blue) bordering a wall (red) will not dry up since it both borders the wall and is enclosed by other water, but the water that has 1 level and doesn't border any walls will dry up and start lowering all the other water block's levels. The 1-level check ensures that water that flows into other water doesn't dry up and cut off the stream.

I dunno if this would be very performance intensive or if it is even possible, but if it was implemented, it'd be very cool! Of course, you've already done a lot of very good work with this mod, so it's not a crime if you decide that this isn't a good feature to implement.

theblondie  it seems that once the flooding travels far enough it self sustains and can not be undone by blocking the original source blcok that started it. i have forests flooded with patches of full water blocks after the initial flood.

Thanks! I did some testing and it is indeed fine with existing worlds.

Would this be compatible at all with Algernon's Watersheds?

Btw be careful making aqueducts..... they make new water blocks so removing then can be a chore later O.o

Looks insanely cool

Is this mod compatible with an existing world?