Unlit / Transparent / Adjustable Grayscale shader

Questions & Answers
1

Hi Can some one give me a hand to create a Unlit / Transparent / Adjustable Grayscale shader?

I’m half way through… I just can’t get the unlit work without causing an error message. :frowning:

Here is my script so far. It is a Transparent/Adjustable Grayscale Shader.

Shader "Custom/Grayscale" {
  Properties {
        _MainTex ("Base (RGB) Trans (A)", 2D) = "white" {}
        _EffectAmount ("Effect Amount", Range (0, 1)) = 1.0
    }
 Category
    {
        ZWrite On
        Alphatest Greater 0.5
        Cull Off
    SubShader {
        Tags {"Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent"}
        LOD 200
 
        CGPROGRAM
        #pragma surface surf Lambert alpha
 
            sampler2D _MainTex;
 			uniform float _EffectAmount;
 			
            struct Input {
                float2 uv_MainTex;
            };
 
            void surf (Input IN, inout SurfaceOutput o) {
                half4 c = tex2D(_MainTex, IN.uv_MainTex);
                o.Albedo = lerp(c.rgb, dot(c.rgb, float3(0.3, 0.59, 0.11)), _EffectAmount);
                o.Alpha = c.a;
            }
 
        ENDCG
    }
    }
    Fallback "Unlit/Transparent"
}
2

I think this shader was written by Jessy. It was posted here:
http://forum.unity3d.com/threads/115455-Unlit-with-adjustable-Alpha

Shader "Somian/Unlit/Transparent" {
 
    Properties{
        _Color ("Main Color (A=Opacity)", Color) = (1,1,1,1)
        _MainTex ("Base (A=Opacity)", 2D) = ""
    }
    
     
    
    Category {

        Tags {"Queue"="Transparent" "IgnoreProjector"="True"}
        ZWrite Off
        Blend SrcAlpha OneMinusSrcAlpha 

        SubShader {Pass {

            GLSLPROGRAM
            varying mediump vec2 uv;
    
            
    
            #ifdef VERTEX
    
            uniform mediump vec4 _MainTex_ST;
    
            void main() {
    
                gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
    
                uv = gl_MultiTexCoord0.xy * _MainTex_ST.xy + _MainTex_ST.zw;
    
            }
    
            #endif
    
            
    
            #ifdef FRAGMENT
    
            uniform lowp sampler2D _MainTex;
    
            uniform lowp vec4 _Color;
    
            void main() {
    
                gl_FragColor = texture2D(_MainTex, uv) * _Color;
    
            }
    
            #endif      
    
            ENDGLSL
    
        }}
    
        
    
        SubShader {Pass {
    
            SetTexture[_MainTex] {Combine texture * constant ConstantColor[_Color]}
    
        }}
    
    }
    
     
    
    }