Question Trying to get a shader to render to depth post processing effect.

Hello,

I'm a beginner with unity shaders and have come across an issue that I can't really find information on. I'm currently trying to make a "toon shader" with outlines. I have implemented a post processing shader that works out an ouline to objects based on depth, to do this, the materials of the object need a depth pass from my understanding, this is something I later discovered when using a different shader to study how lighting is rendered, I noticed that the outlines weren't rendering.

Would anyone know how I could implement a depth pass to this shader?


.shader file:

Code (CSharp):

1. Shader "Unlit/CelShader"
2. {
3.     Properties
4.     {
5.         _MainTex ("Texture", 2D) = "white" {}
6.         _DepthTex("Depth Texture", 2D) = "white" {}
7.         _MainTex_ST("Main Texture ST", Vector) = (1,1,0,0)
8.         _DepthTex_ST("Depth Texture ST", Vector) = (1,1,0,0)
9.         _Gloss ("Gloss", Range(0,1)) = 1
10.         _Color("Color", Color) = (1,1,1,1)
11.     }
12.     SubShader
13.     {
14.         Tags { "RenderType"="Opaque"  "Queue" ="Geometry"}
15.         LOD 100
16.  
17.         GrabPass
18.         {
19.            
20.         }
21.  
22.         //Base Pass
23.         Pass
24.         {
25.             Tags{"LightMode" = "ForwardBase"}
26.  
27.             ZWrite Off
28.  
29.             CGPROGRAM
30.             #pragma vertex vert
31.             #pragma fragment frag
32.  
33.             #include "LightingInclude.cginc"
34.             ENDCG
35.         }
36.  
37.             //Add Pass
38.         Pass
39.         {
40.             Tags{"LightMode" = "ForwardAdd"}
41.  
42.             ZWrite Off
43.  
44.             Blend One One
45.             //src*1 + dst*1
46.             CGPROGRAM
47.             #pragma vertex vert
48.             #pragma fragment frag
49.             #pragma multi_compile_fwdadd
50.             #include "LightingInclude.cginc"
51.             ENDCG
52.         }
53.     }
54. }

.cginc file:

Code (CSharp):

1. #include "UnityCG.cginc"
2. #include "Lighting.cginc"
3. #include "AutoLight.cginc"
4.  
5. struct MeshData
6. {
7.     float4 vertex : POSITION;
8.     float3 normal : NORMAL;
9.     float2 uv : TEXCOORD0;
10. };
11.  
12. struct Interpolator
13. {
14.     float2 uv : TEXCOORD0;
15.     float4 vertex : SV_POSITION;
16.     float3 normal : TEXCOORD1;
17.     float3 wPos : TEXCOORD2;
18.     LIGHTING_COORDS(3, 4)
19. };
20.  
21. sampler2D _MainTex;
22. float4 _MainTex_ST;
23. float4 _Color;
24. float _Gloss = 20;
25.  
26.  
27. Interpolator vert(MeshData v)
28. {
29.     Interpolator o;
30.     o.vertex = UnityObjectToClipPos(v.vertex);
31.     o.uv = TRANSFORM_TEX(v.uv, _MainTex);
32.     o.normal = UnityObjectToWorldNormal(v.normal);
33.     o.wPos = mul(unity_ObjectToWorld, v.vertex);
34.     TRANSFER_VERTEX_TO_FRAGMENT(o);
35.     return o;
36. }
37.  
38. float4 frag(Interpolator i) : SV_Target
39. {
40.    
41.  
42.  
43.     //Diffuse Lighting
44.     float3 N = normalize(i.normal);
45.     float3 L = normalize(UnityWorldSpaceLightDir(i.wPos)); //Directional light
46.     float attenuation = LIGHT_ATTENUATION(i);
47.     float3 lambert = saturate(dot(N, L));
48.     float3 diffuseLight = (lambert * _LightColor0.xyz) * attenuation;
49.  
50.     //specular lighting
51.     float3 V = normalize(_WorldSpaceCameraPos - i.wPos); //View Direction
52.     //float3 R = reflect(-L, N); //phong
53.     float3 H = normalize(L + V);
54.  
55.     float3 specularLight = saturate(dot(H, N)) * (lambert > 0); //blinn-phong
56.  
57.     float specularExponent = exp2(_Gloss * 11) + 2;
58.     specularLight = pow(specularLight, specularExponent) * _Gloss * attenuation; //speculat exponent
59.     specularLight *= _LightColor0.xyz;
60.  
61.     return float4(diffuseLight * _Color + specularLight, 1);
62. }

If this code looks familiar, it is because I'm following along with Freya Holmers explanation of lighting:

Thank you

 

Well you currently have "ZWrite Off" in both of your passes.
So change that
https://docs.unity3d.com/Manual/SL-ZWrite.html

 

FIX: I might seem quite stupid for this, but it was because I had Zwrite off.

I could have sworn that I tried turning it on before to no result.

 

Hello,

Yes, I did realize that i had Zwrite off after posting lol. I did have it on but it didn't fix the issue on its own, so i turned it off to see what difference it would make, and forgot to turn it back on lo.

I actually had to put a shadow caster pass in the shader for it to work, which was with info I got from this dev log: