Official Water System for the High Definition Render Pipeline

Is buoyancy system available in 2022.2.0a8 and will a8 be in UnityHub?

 

@chap-unity out of curiosity how did you guys did the waterline?

 

Ah because the choppiness...

 

I'm getting this error on 2022.2a7 when creating water shader graph

 

Water system in the Viking Village URP looks very similar to this one:

 

Still not working in 2022.2a9 i'm getting black screen and this error now when creating water

 

Hi,i tried this water system in 2022.2a9,it looks great!
i have 3 questions.

1.the foam does not receive ambient lighting, so you can see it is totally dark in the shadowed area. is this normal ?





2.i didn't find any option for contact foam, is this feature not in the plan?
i mean something like this foam:



3.any place i can change the color of the water?

 

I approve of the blood-red sea demonstration there Pierre heh.

 

Adding any water body gives me the underwater effect across the whole world and the surface of the water is nowhere to be seen..... i am using 2022.2.9 alpha.... and also the water shader seems broken

 

It still isn't visible in scene, I just get this:


(Grid lines are invisible due to the water surface)

 

Thx for answer!
about question 3,i mean the color of water diffuse color.
unlike the scattering color only react to direct lighting i mean the color that will react to ambient lighting.
i guess the water is made with a material with black diffuse color, scattering color and refraction color,right?
the shadowed parts can't be only lighted by reflections in real life.
but as you said foam have some problems for now, i guess ambient lighting is in the same situation?

 

This is really fantastic, haven't had a lot of time to play with it but it's great out of the box.

It'd be neat if there was an option to enable only the underwater caustics rendering, independent of the rest of the underwater effects. The light scattering in the underwater toggle seems to conflict with standard volumetric fog, and I'd love to still get these caustics.

For context, while underwater I'm rendering top-down (which means the surface transition elements is not important to my use case), and using normal volumetric fog combined with directional light cookies creates really neat volumetric godrays, if a bit more stylized than realistic.

 

The wave scaling settings bit confusing for me, how to get smaller wave size and preserve the detail/mesh size?
when i mean about scalling is not the wave heights, but the xz scale.

 

I created a thread with setup information in case anyone needs that info:

https://forum.unity.com/threads/how-to-set-up-the-new-water-system.1263698

 

tested on 2022.2.0a9, and for some reason light was not affecting the sea, until i selected light in hierarchy?
(not actually 100% sure how it happened, but seemed like touching the light gameobject helped.. or did i miss some setting somewhere?)

check video at 31:40 where it happened youtube link

 

Is there anything i missed?
still not getting water being rendered

 

The water shows up in my game camera, but not in the scene camera.

 

windows

 

Hello, I recently tested the Water using Unity version 2022.2.0a12 on two projects, on a fresh new project and on a project I have upgraded form Unity 2021.3.2f.

The water looks outstanding and I honestly can not wait until its finished. It just looks so good!

Adding the Water to a fresh new project following the steps provided by @Rowlan (thanks by the way) worked with no issues.

On the other hand adding the water to the upgraded project had/has some issues. With everything set-up correctly, when adding the Water Surface -> Ocean to the existing scene, I got an error and the water would not render.

The error: "Compute shader (WaterLighting): Property (_AirSingleScatteringTexture) at kernel index (1) is not set
UnityEngine.GUIUtilityrocessEvent (int,intptr,bool&)?"

The temporary fix: When I toggled the Sky and Fog Volume off and on, the water rendered and it stop showing the error.
It could be because I am using Lighting Override mask with this project because I stumbled around other issues with it as well. Note that every time I enter/exit play mode I have to toggle the sky and fog volume off and on again in order for the water to render and stop the error mentioned above.

@Reanimate_L Maybe you have the same issue and could try what I have done, hope it will solve your problem for the time being.

Thanks Unity team for your hard work this is just amazing!

 

Hmm nope, doesn't work for my case. Not sure why though

 

Check this guys

This 2d fluid based shoreline and foam looks so good. Can we have something similar in unity?

 

As far as i know it is based on unreals niagara particle system, and somehow turns it into water, but dont quote me on that. This type of water system is much more complex and it is a much different route to implement it this way.

Would be interesting to know what the cost of this is. I think also somebody posted a fog simulation based on particles, to simulate mist going down a mountain. Would be interesting to see.

 

Start coding

 

The original creator of Unity water system (or the previous version i guess) create similar system long time ago if i'm not mistaken

 

You mean this? https://twitter.com/greje656/status/1152054697915797505 I've seen his tweets and they look gorgeous too

 

This thread is for a water shader so I don't think it's meant to be simulated.

BUT there is a particle-based fluid simulation on the VFX graph roadmap : https://portal.productboard.com/8uf...ion?utm_medium=social&utm_source=portal_share

But for now I think that the water shader is the priority as it's missing a lot of features : splashes, GameObject interactions, current, coastlines waves, and collisions for rocks in the middle of streams would be cool too.

 

That vfx thing on roadmap is a real 3d particle based simulation which is not suited for large scale sims as in the video. This 2d approach on another hand is pretty fast and looks very cool. And I don't understand your point about "water shader", everything is shaders and this thread is about water system and everything related to it.

 

Sorry if I misunderstood the point of the tread.
And is the 2d simulation really shader based ? You might be right and that would be really cool to have in Unity.
Also yes you're right about the VFX thing it probably wont work for this kind of simulation.

 

Yeah that one

 

I get this error in alpha 13


Entire screen renders gray unless I disable the water. The water works normally in alpha 11

 

Just tried it out, but I cant get it to work, entire screen either turns into a water color or there is nothing at all, I do have volumetric clouds added, and even those are not visible when the screen is of a water color.

using version 2022.2.0a13

 

You also need to enable it on a volume profile in your scene. If you still don't get it working after that you can check this tutorial and see what settings you might have missed.

 

Dude, thank you very much.
For some reason my brain couldn't compute that step although I did do that similar step for the volumetric clouds lol

 

Hi! Water looks amazing! What about foam disappearing over time and not immediate like now?

 

I think that you can use the "foam drag" slider for that. Unless I'm mistaken.

 

How do we fetch the water height at a specific location? I tried to get the water surface component (script) via code, but it does not seem to be able to find anything of the like

Am I missing a using tag?

I also do experience a lot of lag, having a simple terrain and the ocean produces 6 fps at time at runtime (edit: found the issue on the lag, it was the CPU simulation part and esp. the full resolution check box)

 

So I found it, for anyone that is looking for the same thing add the following using tag:
using UnityEngine.Rendering.HighDefinition;

Via script you can then get the WaterSurface component and fetch the FindWaterSurfaceHeight();

 

To anyone as noob as myself, I did some testing with fetching the water height at a certain position and I have a solution that is working (at least for me), this what I have so far, maybe someone can shed some light on this implementation cause maybe there is something that can be improved.

float FindWaterHeightAtPoint(Vector3 floatPoint)
{
float waterHeight;

WaterSearchResult wsr;
WaterSearchParameters wsp = new WaterSearchParameters()
{
error = 0f,
targetPosition = floatPoint,
startPosition = floatPoint,
maxIterations = 16
};

waterSurface = ocean.GetComponent<WaterSurface>();
bool hightAtPoint = waterSurface.FindWaterSurfaceHeight(wsp, out wsr);
waterHeight = wsr.height;

return waterHeight;
}

floatPoint is basically the specific point in world space where the water height needs to be fetched
waterHeight is the return value when the method is called
waterSurface is the component (script) that is attached to the ocean gameObject
wsr.height what comes out of the fetch

Now that raises the following questions though:
1. what is the error variable for and what happens if I set this to 1 or higher?
2. target and start position has the same vector3, is there any reason to have these there own vector3?

Anyone with knowledge could help me with this would be apreciated, thanks.

 

I haven’t checked myself but is there no documentation on this?
Small note: I would rewrite your code to be an extension method for WaterSurface like so:
“public static bool FindWaterSurfaceHeight(Vector3 floatPoint, out WaterSearchResult waterSearchResult)”
This is way more general, reusable and accessible.
Alternatively, an explicit conversion from Vector3 to WaterSearchParameters would also work.

 

Thanks for the info, this was just a quick test, I also notice that i am fetching the watersurface component in fixed update lol

 

Hello!

I'm experimenting the Water System with 2022.2.0 alpha 13.
Everything works fine except for reflections. The cloud layer is correctly reflected but 3D objects above the water surface aren't. Is there a way to get 3D objects reflected or is this the intended behaviour?



Thanks,
F.

 

You have to:
1.Enable Screenspace Reflection in HDRP quality settings and add it in your Volume Settings.
2.Enable Transparent Reflection for Screenspace Reflection both in HDRP quality settings and Volume Settings.