How can I modify this grayscale shader to work for Transparent Cut Out?

Hi I was looking for a shader that could make gray scale, and I found one, but when it only does so as a diffuse type, I wanted to know how I could make it instead be in a transparent cut out diffuse.

Here is what the shader I'm currently using looks like:

Code (CSharp):

1. Shader "Custom/gray" {
2.     Properties {
3.         _MainTex ("Base (RGB)", 2D) = "white" {}
4.         }
5.     SubShader {
6.         Tags {"Queue"="AlphaTest" "IgnoreProjector"="True" "RenderType"="TransparentCutout"}
7.         LOD 200
8.        
9.              CGPROGRAM
10.     #pragma surface surf Lambert
11.    
12.     sampler2D _MainTex;
13.    
14.     struct Input {
15.     float2 uv_MainTex;
16.     };
17.    
18.     void surf (Input IN, inout SurfaceOutput o) {
19.     half4 c = tex2D (_MainTex, IN.uv_MainTex);
20.     o.Albedo = (c.r + c.g + c.b)/3;
21.     o.Alpha = c.a;
22.     }
23.     ENDCG
24.     }
25.     FallBack "Transparent/Cutout/Diffuse"
26. }

 

Code (csharp):

1.  
2. Shader "Custom/gray cutout" {
3.     Properties {
4.         _MainTex ("Base (RGB)", 2D) = "white" {}
5.         _AlphaReject ("Alpha reject", Range(0.0, 1.0)) = 0.5
6.         }
7.     SubShader {
8.         Tags {"Queue"="AlphaTest" "IgnoreProjector"="True" "RenderType"="TransparentCutout"}
9.         LOD 200
10.        
11.              CGPROGRAM
12.     #pragma surface surf Lambert
13.    
14.     sampler2D _MainTex;
15.     half _AlphaReject;
16.    
17.     struct Input {
18.     float2 uv_MainTex;
19.     };
20.    
21.     void surf (Input IN, inout SurfaceOutput o) {
22.     half4 c = tex2D (_MainTex, IN.uv_MainTex);
23.     clip(c.a - _AlphaReject);
24.     o.Albedo = dot(c.rgb, half3(0.3333, 0.3333, 0.3333));
25.     o.Alpha = c.a;
26.     }
27.     ENDCG
28.     }
29.     FallBack "Transparent/Cutout/Diffuse"
30. }
31.  

 

Ahh this works great thanks! One more question, if I may: what is the way to do a gray scale of a transparent bump diffuse?

 

Well, you could make the diffuse texture grayscale, but else you can also just take the existing shader and add this line:

Code (csharp):

1.  
2. o.Albedo = dot(c.rgb, half3(0.3333, 0.3333, 0.3333));
3.