Interactive Water - Building Worlds In Unreal - Episode 27

In this video, I show you how to use the fluid simulation tools in Unreal Engine 4.26 to add dynamic and interactive ripples to the water in your map. First, I show how to fix a bug that prevents water simulation from working. And then I add the components to our scene and show how to set it up.
Here's the previous episode on water bouyancy:
• Water Bouyancy - Build...
And here's the playlist for the whole series:
• Building Worlds in Unr...
Learn more!
• 4.26 Water And Volumet...
• Reactive Water in UE4/UE5
• Video
• UE4 4.26 Water Foam an...
Resources on the web:
docs.unrealeng...
Shader Book Recommendations
www.bencloward...
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Theme Music
Peace in the Circuitry - Glitch Hop
teknoaxe.com/Li...
Background Music
Sappheiros & Almaa - Dreams
• Sappheiros & Almaa - D...
#UnrealEngine #float #water

[@WHITERATPRIME1234567]

HOLY SHIT BALLS! Finally someone that actually understands what they are showing!

[@philluo3968]

hi,it work in UE4,but not in UE5,anyone how to fix it?

[@mongmong4519]

You are the best Since I found this tutorials I don't need to expend any money or times to get other tutorials

[@wesleyjames6680]

Thank you so much! I've been getting nowhere with this myself. Really appreciate your content!

[@1d33f1x3]

Thank you for the simple and straight forward tutorial! This is the first time since 4.26 came out that I've been able to get the fluid sim working! Now on to the rest of the series...

[@MR3DDev]

Great video as always now we can finally use this system like they did on the preview

[@BenCloward]

I'm hoping they'll make a new release soon with these issues ironed out so people don't have to hunt down random KZbin videos to figure out how to fix them. :0) I still haven't been able to get the foam to work, for example.

[@moddes3980]

@@BenCloward Check this video out - kzbin.info/www/bejne/e3i7fZ-FjMl7f7s it has the foam working from 4.26 preview 7 and the guy has a downl linked in the video description for the water plugin on its own. It might help you answer the questions as to why its not working in the current version. Thanks again!

[@bentripn]

@@BenCloward I'm also working on learning everything I can about the new water system. Thank you for the video!

[@moddes3980]

Brilliant video, made it look so easy getting the fluid sim to work haha! Amazing content as usual Ben, thanks!

[@PFINNEY]

Thank you! This is the first UE water tutorial that's actually helped me :)

[@gabehenry9404]

would love an update to this video with the interactive water working in UE5

[@alan112223]

Same

[@emrearslan9572]

What kind of Update do you mean? This is my first Water Material and I will recreate it, did something change?

[@alexanderboyko1866]

Thank you for Fix simulation!

[@veronikadziubliuk381]

I've been struggling with this for so long! THANK YOU!

[@veronikadziubliuk381]

There is one particular problem that always appears. My BP_FluidSim changes it's location to another place while simulating. And it is always the same place and I can not move it. I mean I can change simulating world size to some tremendous amount so it could reach the water, but maybe you know how to solve it ?:)

[@BenCloward]

In the Simulation properties on BP_FluidSim_01, there is a check box called Follow Player. If that is on, the fluid sim will snap to the player location when you run the game. That is usually what you want, because you want the fluid simulations to happen around the player, where ever he goes in the level. But if you're just trying to simulate and test behaviors in the viewport, you can turn that option off and the fluid sim should then stay where you put it originally.

[@veronikadziubliuk381]

@@BenCloward oooh, now I see, thank you!!

[@msinclaircorp4571]

YES!! i learn a lot!!, thanks to you Ben, the topic of the foam is very important!! i am looking answers to.

[@fleurbird]

You're a wizard ben...

[@BenCloward]

Sounds like a Harry Potter quote! ;)

[@fgc930]

Not working on UE5 Preview.

[@snowbeat936]

Have you find any solution?

[@fgc930]

@@snowbeat936 No i use other plugins.

[@snowbeat936]

@@fgc930 can you say me which one ?

[@julienb2764]

Thank you ! Please make the same tutorial for UE5.1 :)

[@nk361]

They made the same kind of mistake with the paintable clouds demo. It doesn't work by default in the demo, you have to connect a texture in it to another place for it to work. It feels like the documentation is so bad and things just randomly don't seem to work how they should. I hope they fix those with UE5. Their custom HLSL documentation page is outdated and doesn't work too. I was really looking forward to writing my own custom shaders.

[@momomadi2]

thanks

[@felixmikolai7375]

Sir please consider making a tutorial series on the voxel plugin for ue4! i guess its a big part of the future of gaming and there isnt much content for beginners at all at the moment. thanks for your content as always

[@naixelnxl2640]

Thanks you for this video and did you make a video for do this with the third person character ?

[@BenCloward]

Not yet. I may include that in next week's video. This one is just the basics.

[@lhwweiss]

Is it possible to make the default third person character interact with water like the yellow character?

[@AldenFilionCG]

Life saver as always...much needed video. Have you had any luck using the water tool with world composition? I have been racking my brain trying to get it to work in a tiled map in world comp. Thx again for this video series! Super helpful!!!

[@BenCloward]

Nice to hear from you, Alden! I think I read somewhere that the new water system didn't support world composition, and that they purposefully chose to leave out support for it since they're working on a world composition replacement. I don't remember where I heard or read that, so I may be wrong.

[@AldenFilionCG]

@@BenCloward Hey hey Ben, glad you are well! Thanks again for these video sets on open world. I figured the water stuff was too beta but if anyone would know what's going on behind the scene on those systems, you would be the one :) Doing virtual texture setup now, so gonna re-watch your vid on that. Keep them coming!!!

[@bransomething]

Thank you! :)

[@yuling1683]

Brother, is there any content about snow or mud interactive simulations tutorial

[@HSR_Freak]

YOU ARE GENIUS! I missed that. Can You add foam?

[@Zero_hk]

can i get a simple ripple effect instead of some expensive over the top water simulation??

[@BenCloward]

Yes. Here's a video that shows how to create simple ripples: kzbin.info/www/bejne/qGebdaGKgsp5fLM Starting with this video, I have 7 videos that show how to create more basic water.

[@Zero_hk]

@@BenCloward how do I make it transparent? Tried my own solution bit had some issues

[@Romain_Derelicts]

Hello Ben! Really great tutorial! Did you ever manage to make the river foam work depending on the velocity applied to the spline points? I've been searching how to do it for a while, in vain. There is a video of the plugin from Epic showing foam based on the velocity.

[@unrealdevop]

Idk what's going on with mine, but the 'BP_Dynamic_Force_Component' has waves but their flowing at about 1000mph in the direction the river is flowing....I've been messing around with stuff but for the life of me I can't figure out why it's doing it..... Update: The 'Simulation World Size' seems to have a constant animation length....so the larger you make it the faster it has to go to reach the edge...I guess this isn't really relevant since you probably wouldn't want it too big to begin with since it's meant to follow the player.

[@alan112223]

Thank youuu! Any chances to have this topic covered in UE5?

[@maxchiassonart8869]

Amazing!!! How do you get it to work in a sequencer if you had a boat and wanted to cause waves? Having it play or work when you press play on a sequencer? I can't find tutorial on this anywhere

[@bernhard.design]

Ben, did you ever dive into an underwater solution with the ocean and water plugin from Epic and 4.26? Everything seems surface based, but no volume solutions for underwater shots. Curious about your thoughts and keep rocking, cheers 😃🍻

[@marcapouli7805]

Nice video, too bad it doesn't work in UE 5

[@KiloLime]

i was wondering why tf it wasnt

[@marcapouli7805]

@@KiloLime Let's say it is half-working. Can't use buoyancy, can't use interactivity...

[@KiloLime]

@@marcapouli7805 I just can’t get any sort of impulse working :,(

[@marcapouli7805]

@@KiloLime Same, I managed to make it work in UE4, but each time there was an impulse, the whole water body was sucked like a low tide, no matter the settings. A shame it is less working years after, and after a major softawre update

[@thanoszag6563]

Hi, very interesting video, I would really like to see how to make water in a bottle. Hope you are going to make a relating video :)

[@ArcaneRealities]

Good vid - why does the sim stop sometimes and restart ? Are you clicking the mouse - or is it really that jenky that it cannot continue the last impulse - so you couldnt have a pulsing impulse action ? like something hitting a pool every 3 sec or will the previous ripples continue ?

[@BenCloward]

I'm not really sure to be honest. I'm not doing anything on purpose to make it do that. Seems like the simulation is reseting itself. But I'm not too worried about it since this is just the in-viewport preview of the effect and not the actual running game.

[@Bordodai]

Any idea where I can find that water content folder. I dont see it in any unreal release I've tried. and it doesnt come with the water plugins

[@beaabraira9808]

Hi! I would like to thank you for your tutorial, you saved my life with the explanation about how to fix the foam material. But I still have a problem with the ripples. I did the ripples using the Bp_fluid sim but my landscape is not flat, it has different heights and I have a problem with this. I have ripples in one height but not in the others. I built (with a coworker) a complex system in the Bp_fluid sim. But, it´s a madness because we need to calculate the heights all the time, and even that doesn´t work correctly. I´m asking you, is there a way to do this? I mean, how can I make the ripples in different heights in my landscape? Thks again ^^

[@jamescleave7024]

I'm confused: at 7:54 you just select the river object as Water Body in BP_FluidSim. As far as I understood, it is a water body object from 4.26 water system, but in previous series you've been making your own water shader, and the river used to be just a plane with water material on it? Is it possible to use this interaction thing with a custom water shader or not?

[@BenCloward]

My videos make the most sense when watched in order. In episode 24 (kzbin.info/www/bejne/m2nMe5tnq5eDr7s) I add the water system. In episode 25 (kzbin.info/www/bejne/ipOkq4SQZ9yUhas) I improve the appearance of the water, and in episode 26 (kzbin.info/www/bejne/hHy7XoJ4n99ggtE) I show an easy way to make objects float in the water. The method of just using a plane with a water shader on it doesn't allow for easily making objects float on the water, or making objects create dynamic ripples in the water - so I switched to Unreal's built-in water system to show how those effects could be achieved. I hope that helps.

[@zombieallen]

Was there ever a follow-up on how to attach this to a player character?

[@Ka2Fa]

Can I add this BP to the water shader you showed how to make before the 4.26 water system came out? I followed it in 4.26, so could just import what I need directly. I don't really need a big landscape kind of water, it'll be inside a building so the new system isn't really useful for me yet. I know I can just use their material for custom shapes, but would prefer to use my own since its for a uni project and the whole point kind of is to make it myself and I've already customized it for my needs.

[@KindTom1]

Thanks for the Tuts. Can this work with an imported Alembic Animated mesh?

[@cristobalthompson2932]

Hi, tried to use this on my mannequin, and it works, but when i compile there is an error in M_ForceDisplay_01, that is a material in the water plugin material. Can you help me ?

[@captainunknown2839]

Awesome Tutorial, Is it possible to make Unreal Engine Water an infinite Ocean If we use Far material It has a visible transition & moreover it's not explorable (by the player it's just a basic rendition) How do we make it infinite ocean with Waves, Buoyancy & everything should work just as it does in Watermesh actor?

[@pingusmcdingus5124]

If I have two WaterBodyCustom planes at different elevations, do you know how I could solve ripples on both using BP_FluidSim_01? - Ticking 'Follow Player' allows BP_FluidSim_01 to track with the player in X and Y, but if I go up a hill to a second WaterBodyCustom at a higher altitude, the ripples won't be simulated because BP_FluidSim_01 is too far below. - Can't add a second BP_FluidSim_01 at the other elevation since this breaks fluid simulation for the entire scene. - I've tried adding a trigger volume to change the Z position of BP_FluidSim_01 when the player enters it but that doesn't do anything. Ripples are still solved for the lower pool not the higher one. Been pulling my hair out over this for the past few days now. Would be curious to find out whether anyone else has come across this issue before.

[@Gourkan]

Hi Ben. Have you found a fix for the broken shore foam as well? It would be great if you could figure out how to replace the "Fill texture 2d" in the "WaterBody_Niagara_ShoreFoam" asset. Thanks for the great content.

[@BenCloward]

I found a solution in a forum post, but it required recompiling the water plugin, which was something that I didn't want to ask my viewers to do. I think we just need to wait a few more weeks until Epic releases a fix for it themselves.

[@dpredie]

is there a simple way to create a small water like aquarium

[@Ben_CY123]

Hi, in the last Water Bouyancy video, the physics reaction makes the trunk look too light and it reminds me this problem also happened in Final Fantasy 7 Remake, a AAA game using UE4. Any idea can fix this problem? I did some test before and I think the reason should be is the character movement component not calculate the physics reaction with physics body, just generate unlimited force to push every physics object far away even the object have 300kg. Btw, great tutorial! learn a lot from this channel!

[@BenCloward]

This is something I'm going to address in the next video.

[@yearight1205]

All the thing's you've done with water, an entire playlist. And yet, I still could not find that which I seek. I hope you see this. I am making an animation with a boat, and the boat is animated to go on top of a static mesh of water. The problem is the water is clipping into the boat. I haven't got a clue how to make it so that the static mesh doesn't penetrate the boat's hull. Do you by chance know how to do this?

[@BenCloward]

There is a good way to fix this. Create a flat mesh that fits inside your boat from the top - sort of like a lid for your boat. Ensure that it is positioned high enough so that it’s always above the water. Then assign it a material that’s set to be transparent. And also set it so that it renders first, before the water renders. (I don’t know the details for how to do this in Unreal, but you should be able to figure it out). A transparent plane that is above the water but draws before it should make the water that clips through the boat invisible.

[@dropcheck6562]

This is great. Just what I was looking for. Do you have a link for Ryan's demo?

[@BenCloward]

I think I included it in the description? If not, it's here: kzbin.info/www/bejne/jnnYmHeOrZuWa8U

[@dropcheck6562]

@@BenCloward Thank you :)

[@bobboberton349]

how do you speed up how quick the ripple expands?

[@grimsk]

홍석님에게..

[@plasid2]

Fludi simulation stop working different high water level how fix it?

[@officialAfron]

why does this not work on mobile? when I launch to my iphone device, it opens the launch screen then shuts down without loading the game

[@BenCloward]

I'm not surprised at all that water simulation doesn't work on mobile. It's a very high-end feature.

[@officialAfron]

@@BenCloward Contrary to that, it's actually supposed to work. Mobile devices have reached the performance of PS4 console power, there is no indication of the water plugin not working on mobile in the documentation. Also epic's tutorial video talks about how the plugin is used in fortnite for both mobile and desktop/console, even stating the settings they use on mobile, so yeah it should work on mobile.

[@Maxparata]

Anything new on the foam?

[@lrogam]

works in unreal 5 too?

[@coromotostudio9842]

Noup

[@ashwinj9879]

not working in 5.1.1 :/

[@blanketparty5259]

Can you add bouyancy to this material for boats?

[@BenCloward]

I show how to do that in episode 26 and 28: kzbin.info/www/bejne/eZyTZ6mZebh7mLM, kzbin.info/www/bejne/hHy7XoJ4n99ggtE

[@blanketparty5259]

@@BenCloward awesome ! Thanks )

[@blanketparty5259]

@@BenCloward Oh wait just realized this is the new water from UE. I cant seem to get it working with my map as its 8k by 8k. /:

[@MustafaBerkeGureltol]

The simulation itself looks terrible though :D

[@nk361]

Real time is to blame for that honestly, someday we'll be able to make the cooler ones work in real time

[@MustafaBerkeGureltol]

@@nk361 Water sim in Ubisoft's games look fairly better than this one tbh

[@BenCloward]

I think I could improve the look if I spent some time tweaking the settings. I didn't put any effort into the appearance here - just getting it up and running.

[@MustafaBerkeGureltol]

@@BenCloward I know, sir. I love your videos. Using a bit of tesellation in the water shader would help a lot, I belive. We could also add some foams/flipbook particles onto the water surface by using the DepthFade node.

[@MustafaBerkeGureltol]

But that would also require us to get the location and rotation data from the character component to properly create the visual inside the material.