Feedback Wanted: Shader Graph

Digging a bit deeper today, it looks like this texturing technique is actually done using the Stencil Buffer. Unfortunately, Shader Graph does not currently support writing to the Stencil Buffer.

Does anyone have any information about when that might be included? I can't find anything posted about it.

 

So apparently HDRP 3.0.0's Shader Graph is still broken for me for 1) Transparent materials 2) _CameraDepthTexture grabbing. Both pretty vital for creating a water shader. Has anybody got these working in HDRP?

 

I'm also having trouble getting _CameraDepthTexture to work for an equivalent to: http://wiki.amplify.pt/index.php?title=Unity_Products:Amplify_Shader_Editor/Depth_Fade

I'm finding it a little troublesome to port my shaders over to HDRP given the current limitations of the Shader Graph. I can't wait for some in-depth documentation on how to code shaders for HDRP. Looking at the HDRP shader source is a little overwhelming for my current knowledge level.

It would be nice to have Unity devs be as responsive on this thread as some of the devs are in other threads. Input system, Vector graphics, Text Mesh Pro, Collaborate and other such departments have really active participation by their respective developers. It's really great to see. It would help a lot to get some info on whether certain things will be supported in Shader Graph or not, or what features are upcoming or being developed. It seems like dev participation started off real strong in the beginning of this thread, but has kind of tapered off now except for @wyatttt

I guess we'll have to wait for the 2018.3 beta to see any developments on the Shader Graph.

 

Anyone have any idea why it won't allow me to connect from the Transform (World to Object space) to the Position of the PBR Master node? I must be missing something very simple.
(Unity 2018.2.2f1, LWRP & Shader Graph 3.0.0)


NOTE: Before creating the sub graph (Gerstner) from most of the nodes, all of the nodes connected without a problem.

 

@Clyde_Coulter : can you post the json of the graph? It's hard to read anything in the screenshot without zooming in 500%

 

Hey guys, I was bored to change the render pipeline every-time I wanted to see the differences between legacy, LW and HD render pipelines, so I've created a shortcut to apply a new render pipeline that's currently selected in the project view.

Code (CSharp):

1.  
2.  
3. using UnityEditor;
4. using UnityEngine.Experimental.Rendering;
5. using UnityEngine.Rendering;
6.  
7. public class SwapRenderPipeline
8. {
9.     [MenuItem("RenderPipeline/Swap render pipeline %F1")]
10.     public static void Swap()
11.     {
12.         RenderPipelineAsset renderPipelineSelected = Selection.activeObject as RenderPipelineAsset;
13.         GraphicsSettings.renderPipelineAsset = renderPipelineSelected;
14.     }
15. }
16.  

If you select a render pipeline and press Ctrl+F1 it will apply it, select anything else or nothing, it will reset the property.
That's verryyyyyyyyy simple but quite handy and time saver. Feel free to use it and change the key shortcut used (might not be the easiest one to press)
Cheers !

 

Here it is: https://www.dropbox.com/s/voziic0hxx28sgw/Gerstner_01.ShaderGraph?dl=0
Of course, it refers to a subgraph though.

 

Anyone know what the various colors of the node connection edges mean?

The short doc on wiki for shadergraph/edge just mentions "Each Data Type has an associated color for identifying its type."

Ha! A click on the link "Data Type" above takes me to a description of the colors used. https://github.com/Unity-Technologies/ShaderGraph/wiki/Data-Types

 

@Clyde_Coulter I tried setting the out(3) to positions(3) but it didn't work either. However if a create a Vector3 node, it can be linked to the position. I'm not sure the reason for this. But it happens on my computer too.

 

I'm installing 2018.2.3f1 right now (well, downloading currently) to see if it works in it.

 

Nope, that didn't help.
The thing is, the last node in the subgraph is a Vector3 that connects to the Subgraph Output node. The line coming from the subgraph should be yellow.

 

I have created a very small subgraph, containing a single vector3 and then tried to use it in another graph.
As can be seen, it is prepared to accept the output of the subgraph on all masternode inputs except the position.



(Dang! Photobucket compresses the crap out of png files! )

 

A question from non-shader guy: in HD shader graph is it possible to create a shader that can use edges and caverns of mesh geometry as a mask for effects like edge weathering and many more? Something like this:

If I can have a realtime pointiness values and use them in shader graph for an arbitrary mesh it is possible to create effects like this without baking a mesh-specific textures - just layers of effects masked by angles between polygons:

 

Out of the users here, who is using the latest (up to date) SRP, LWRP and Post Processing using the Package manager? I'l be releasing my SGE demo shortly (see thumbnail) and I wanted to know which is most likely to be used. Currently it's on the LWRP for 2018.2 (moved from 2018.1).

I've added a few more things based on feedback from this thread so it should be relevant to a fair few people.

 

Hi there I'm using LWRP and Shader Graph (2018.2)
One thing I recognized is that the Unlit Master Node doesn't offer appliance of the global unity fog. In my use case I want to manage lighting by myself but I also want to use the built-in fog. It would be great when I'd have the option to enable what I need for my specific master node (e.g. shadowing, etc.)

 

Hello,

I asked around on twitter, and from what I got so far, the results of the Shader Graph are re-rendered every frame, even when no animations are applied. And the texture actually is static. Can you confirm that ? If thats the case, how can I store the final texture into another one, lets say in a pre-compute step ?

 

How can get acces to this particle vertex streams in my shader graph?



I tried using a UV node with Channel 3 but im not sure if thats the correct way because it doesnt work atm.

EDIT: Okay i was able to access it via the UV node and channel 1 (because it obviously says TEXCOORD1 ).
But now i have the problem that i cant access the color values correctly...
The color it outputs is not the color i have chosen in the Custom2 custom data module.
For this im again using the UV node and channel 1 but accessing the yzw values.



EDIT2: Because i wasnt able to access the correct color value via the channel 1 yzw values, i added another "placeholder" vertrex stream for texcoord1.yzw and then another one for the Custom2 data using the full range xyzw values. This time i could access the via the UV node using channel 2.

 

I haven't tried it, but if I were to attempt it then I would take a look at using render to texture. Create a camera and new render texture and render certain assets to that using layers (?).

 

Lighting and vertex displacement.

I'm playing with deforming a spherical mesh with some noise and I've noticed that the lighting seems to only be calculated against the sphere proper and never on the deformations. Is this a forward vs deferred problem? e.g. there is a specular highlight that appears baked into the surface instead of updating as the noise deforms the surface.

 

Are you modifying the normals also to conform to the deformations?

 

How I deal with it...

And when I graph it...

 

How do you run a procedural node into a triPlanar projection. It only seems possible to pass it an existing texture, how do you turn a procedural node into a texture to pipe into a triplanar projection so you can texture geometry with no UVs procedurally?
Maybe that just isn't possible to do entirely internally in a shader but it sure would be handy if you could procedurally pre-create textures to apply.

Ah ha! Maybe using these
https://docs.unity3d.com/Manual/CustomRenderTextures.html

 

That does the job nicely.

 

Is there a reason your voronoi noise node doesn't output distance 2?

 

@Luoyue @MythrilMan51 I made a previous post showing the subgraph for LinearEyeDepth. Here it is again:

You can use this to convert the _CameraDepthTexture value back to an actual distance that can be used to compare against z value of the Position node (in view space).

If you want an example, here's that force field shader that leverages the LinearEyeDepth subgraph:

There's probably some simplification that could happen here, but it was a quick pass.

 

Is there support for [PerRendererData] properties in Shader Graph?

 

Hello,
I wanted to create a sprite shader where I change the albedo's color to a color defined by a gradient.
But I found that the gradient can't be converted to a property. I would really love to modify the gradient per material. Even more, per instance.

 

How to make custom lighting in shadergraph?

I would like to control the frenel based on normal orientation (faking the light angle) so I could make something like this

 

Recalculating normals...

I'm working on a graph that uses noise to create vertex displacements on a sphere, but I need to update the normals so the lighting and reflections are accurate. So far I have not found any examples of how to do this... Any thoughts?

 

a Normal From Height node should be coming in the next version of Shader graph so you will be able to use that to get the proper normals.

From - Github Shader Graph Changelog

 

I can't update it because it tell me it's up to date with 3.0.

 

... What's the current version of it?

 

[3.1.0]

 

Any help getting started writing a Gerstner custom node would be greatly appreciated. I've been looking for any docs on writing custom shaders for shadergraph and what the available method(s) are. The CodeFunctionNode examples are really sparse, and only give very simple examples without any doc on writing a shader for that environment. This will be completely new to me, but I'm willing to and capable of learning.

NOTE: I think I just need to implement a vertex or compute shader for this.
EDIT: I found the code on GitHub for the current shadergraph nodes, that should help.

 

I bet it's a bug... I mean... I'm on the latest version on Unity... 2018.2.4... So I wouldn't know... Unless.....

 

I don't see it there... Take it up to the manager.

 

What is equivalent to shaderforge's Append node in Shadergraph ?

 

combine node

 

Do you just want to do a fresnel effect from a different angle than the view angle? If so the equation is pretty simple and you could just replicate it.

Out = pow((1.0 - saturate(dot(normalize(Normal), normalize(YourNewDirection)))), Power)

 

Yes, and that got me going pretty well with the hook up for deriving from the CodeFunctionNode, but the syntanx and the like for coding the shader was what took me a bit to figure out.

I got it going, though, and it works pretty well. I'll post a video and pic in a bit once it uploads. I really like how the integration works, it makes it really pretty easy to implement a new node!
(thanks for giving me a push to get started with it!)

 

@wyatttt
Here it is, 2 of the new nodes in action together:

I'll have to work on the normals, can't quite get them right.

 

I tried using this from an article on it since I have most of those ready to be used from calculating the wave function. The article is at: https://developer.nvidia.com/gpugems/GPUGems/gpugems_ch01.html

 

I can post the code, if you want, for the node and maybe you can play with it and see how it goes.
I thought that I might be able to use a Normal Blend node to blend from multiple Gerstner nodes.

 

@wyatttt

Edit: Oops, I might see the problem with the normal....I'm doing a dot(Di, wpos + offset), but wpos is a vec2 of worldpostion.xz, and offset is xyz (so I changed it to offset.xz).

Code (CSharp):

1. // Editor/GerstnerNode.cs
2. [Title("CoulterMade", "GerstnerA")]
3. public class GerstnerNode : CodeFunctionNode, IMayRequirePosition, IMayRequireTime
4. {
5.     public GerstnerNode()
6.     {
7.         name = "GerstnerA";
8.     }
9.  
10.     protected override MethodInfo GetFunctionToConvert()
11.     {
12.         return GetType().GetMethod("GerstnerA", BindingFlags.Static | BindingFlags.NonPublic);
13.     }
14.  
15.  
16.     static string GerstnerA(
17.          [Slot(0, Binding.WorldSpacePosition, 0, 0, 0, 0)] Vector3 WPos,
18.          [Slot(1, Binding.None, 0.707f, 0, 0.707f, 0)] Vector2 direction,
19.          [Slot(2, Binding.None, 2.0f, 0, 0, 0)] Vector1 waveLength,
20.          [Slot(3, Binding.None, 0.2f, 0, 0, 0)] Vector1 amplitude,
21.          [Slot(4, Binding.None, 0.5f, 0, 0, 0)] Vector1 speed,
22.          [Slot(5, Binding.None, 0.7f, 0, 0, 0)] Vector1 steepness,
23.          [Slot(6, Binding.None, 1.0f, 0, 0, 0)] Vector1 numWaves,
24.          [Slot(7, Binding.None, 0, 0, 0, 0)] out Vector3 offset,
25.          [Slot(8, Binding.None, 0, 0, 0, 0)] out Vector3 normal
26.         )
27.     {
28.         offset = Vector3.zero;
29.         normal = Vector3.up;
30.  
31.         return @"
32.            {
33.            float2 Di = normalize(direction);
34.            float2 wpos = WPos.xz;
35.            //{precision} wi = 6.283185 / waveLength;
36.            {precision} wi = 2.0 / waveLength;
37.            {precision} Qi = steepness / (wi * amplitude * numWaves);
38.            {precision} QiA = Qi * amplitude;
39.            {precision} Pt = speed * wi * _Time.y;
40.            {precision} k = wi * dot(Di, wpos) + Pt;
41.            {precision} cosK = cos(k);
42.            {precision} qiAcosK = QiA * cosK;
43.            offset.x = Di.x * qiAcosK;
44.            offset.z = Di.y * qiAcosK;
45.            offset.y = amplitude * sin(k);
46.  
47.            {precision} WA = wi * amplitude;
48.            {precision} DdotP = wi * dot(Di, wpos + offset.xz) + Pt;
49.            {precision} C0 = cos(DdotP);
50.            {precision} S0 = sin(DdotP);
51.            normal.x = -(Di.x * WA * C0);
52.            normal.z = -(Di.y * WA * C0);
53.            normal.y = 1.0 - (Qi * WA * S0);
54.            normal = normalize(normal);
55.            }
56.        ";
57.     }
58.  
59.     public bool RequiresTime()
60.     {
61.         return true;
62.     }
63. }
64.