Screen Space Fluids Shaders [RELEASED]

Screen Space Fluids (SSF) is a set of high-quality shaders for rendering the surface of particle-based fluids with real-time performance and configurable speed/quality.

SSF Pro provides higher quality and more features (fluid translucency, refractions) than the free version of SSF. See screenshots for comparison.

The SSF method is not based on polygonization and as such circumvents the usual grid artifacts of marching cubes. The shaders smooths the surface to prevent the fluid from looking "blobby" or jelly-like. It only renders the surface where it is visible, and has inherent view-dependent level-of-detail. All the processing, rendering and shading steps are directly implemented on graphics hardware.

SSF Pro

SSF

QuickStart video:

SSF provides only fluid visualization that can be used, for example, with Unity's Particle System. However, SSF works best with third-party fluid simulation library such as uFlex.

SSF requires GPU with ComputeShaders support (e.g. DX11).

SSF is under development. Any bug reports and feature requests are more than welcome.

 

Very very nice ! I like it.
6R

 

Can i use this in some way to render imported particle animations from other 3D software in mdd, pc2 or another format?
I think i read some time ago that there are point cloud import formats for unity in the asset store.
Maybe i have to read more about what a particle is in unity.

Edit:
Would love to use it with this asset and animated objects/particles from my animation programms from where i can export pc/pc2 files.

https://www.assetstore.unity3d.com/en/#!/content/21869

 

Is there a refraction/transparent version?

 

Of course, you just need to slightly modify the fluid renderer script to read the particles positions from the particle cloud rather than Unity's particle system. Half a minute job.

Yes, however it will be part of SSF Pro (i.e paid version), which will be coming to the asset store this month.

 

Very cool plugin.
I got a small bug. Incorrect intersects a very large particle with objects in scene.

 

Thanks for reporting this, will have a look into this.

 

Question. Is it possible to do so, to draw particles in different colors separate?
In SSF_FluidRenderer colors are sent through the m_colors array, but in the end all particles are colored in the color specified in SSF_ComposeFluid.
Question2. Perfomance Pro version than free: better, lesser, equal?

 

SSF Pro v0.1 is now live on the AssetStore! v0.2 supporting fluid transparency with refractions coming very soon.

 

Yes, I will have a look to add colouring per particle in the v0.3 release

It will get faster, I will focus on shader optimizations in the next releases

 

Hi, do you have any approximate schedule for the refractions?

 

I've submitted v0.2 to the AssetStore an hour ago. Hopefully, should be live this week.

 

Great, just bought both SSF and uFlex.

 

Awesome, have fun!

 

You need a orc bathing in mud and drinking beer demo scene ...

Spoiler: Example

I mean it's the same quality anyway!

 

Thanks Neoshaman!
Will think about it

 

korzen303,
can i get the latest Pro version if i already bought it? assetstore updated too long ( i downloaded 0.1v)

 

This looks great! For optimal usage what does one need?

Uflex + SSF Pro?

 

Sure, just please drop me your email (preferably gmail) address.

First, try out uFlex as it comes with HQ shaders from SSF Pro included for free. Getting full version of SSF Pro will give you, at the moment, fluid translucency and rafractions.

 

korzen303,
i sent.

 

SSF Pro v0.2 with fluid transparency and refractions is live on the AssetStore now

 

OMG you will blow people mind if you have a throw back to a known CG movie lol

Currently can't buy it, I need to see my banks you should have my money, I'll make sure you'll get it

 

The mud simulation shouldn't be a problem but I would need a similar scene and rigged Shrek model

 

I'll see if I can do or find something, I can't promise anything.

 

Hi, first off I am really happy with my purchase of SSF Pro. - Works like a charm. There is only one thing i am missing featurewise. Is it possible to get it working with sub emitters correctly?
cheers

 

I hope the development of the plugin continues?

 

Yes, it continues. I am on holidays at the moment and will release the SSF Pro v0.3 just after I come back

 

@korzen303 – Any chance this plugin supports VR? Also, do you happen to know if SSF would work with Fluvio – you said it supports unity particles which Fluvio I think is based off of?

 

@macdude2 - I don't have a HMD to test it with VR. NVidia has recently released the Funhouse VR demo which is using SSF in VR so certainly it is possible. It may require some tweaking though for stereoscopy as SSF works obviously in screen-space and is applied as a post-processing effect.

 

I decided to test it out – at the moment your effect does not seem to work for VR. It was unfortunately not only extremely slow, but it also seemed to not even render correctly (however, this may have been due to the refresh rate). The particle balls, however, did work pretty well. They definitely look better than standard unity particles and I believe would look OK in a more cartoony game.

 

First, I want to polish the SSF for non-VR applications. Maybe, meanwhile NVidia will update flex shaders for VR use, which will ease things out for me.

The fastest way to speed up SSF is to lower the resolution of the target render textures (from 2k to 1k or even 512x512)

 

So, when will we see 0.3?

 

Hi,
I'm a Uflex and a SSFPro user, I'd like to know where can I get the SSFProFlexFuildRenderer class ?

 

Hi, please drop me your email. I will send you the integration package. Sorry about this

 

a few questions:
1. How to use m_colorBuffer in FluidRender( Pro and nonPro )? I set a different color for each particle in fluid_render script, but they are still displayed with the color specified in the FluidComposer.
2.What meen the setting MinDepth in FluidRender? Change it, but do not see changes in the image.

ps: version 0.3

 

Hi SG,

I am afraid that this is not supported at the moment but I will look at this for the next release.

Regards

 

korzen303,
how about my questions? a few the post above

 

Hi,

sorry, missed that.

1. ColorBuffer is currently not in use. I will look how to add fluid colouring in the future release.
2. I am not 100% sure if it is currently in use (maybe depends on the shader type). Basically, it only affects things when you are very, very close to the fluid surface. Nothing really important though...

 

korzen303,
ok, will be waiting.

 

Hi,

just to confirm that both SSF and SSF Pro work fine with VR except when using Single Pass Stereo Mode. This includes point sprites as well as fluid rendering.

 

Hi... I noticed that SSF isn't working properly in the 5.5 beta. I wonder if you can spot what the problem is and if there might be an easy fix? I've attached screens of SSF_GreenGoo in 5.4 vs 5.5:

 

Hi, thanks for reporting this will check thisas soon as possible.

 

Hi, I bought SSF and Uflex, I'm doing a project with Oculus Rift and I have disabled the option single pass stereo rendering in player setting, it does not work, the fluid appears frozen. Please help

 

Can I use this with fluid based cloth? Jim mentioned testing your code here with his cloth testing.

 

The SSF Pro versions improves the fluid rendering quality and works great with uFlex, if that what is you are asking about.

 

Hello @korzen303 , any way that FlexColliders only takes a specific mesh and not all those that are in the scena automatically? , I put the mesh that interests me but the script automatically puts all of the scene

 

HYE ::-- IS THERE ANYWHERE AN TUTORIAL ABOUT THE TRANSPARENT - REFRACTIVE SHADING::-- IS IT POSSIBLE TO ADJUST THE " SSF" IN ANY SCHADEREDITOR -(SHADERFORGE;AMPLYFIED SHADEREDITOR)

 

FYI - in Unity 5.6:
Shader error in 'ScreenSpaceFluids/SSFPro_ThicknessShaderHQ2': 'UnityObjectToClipPos': cannot implicitly convert from 'float4x4' to 'float4' at line 125 (on d3d11)

 

Hi Korzen,

I just bought uFlex and SSF Pro. I plan on using it for simulating white water rapids in a river. I was wondering what the progress was on the features below?

-Translucency with volumetric absorption (Beer's Law)
-Improved lighting support
-Shadows
-Surface noise
-Caustics