TestSurfaceDecal_Blend

Shader "Custom/TestSurfaceDecalBlend" {
    Properties {
        _Color("Main Color", Color) = (1,1,1,1)
        _MainTex("Base (RGB) Trans (A)", 2D) = "white" {}
        _BumpMap("Normalmap", 2D) = "bump" {}
        _SpecGlossMap("Specular", 2D) = "white" {}
        //_SpecColor("SpecColor", Color) = (1,1,1,1)
        _Specular("Specular", Range(0.0, 1.0)) = 1.0
        _Gloss("Gloss", Range(0.0, 1.0)) = 1.0
    }
    SubShader {
        Tags { "RenderType" = "Opaque" "Queue" = "Geometry+1" "ForceNoShadowCasting" = "True" }
        LOD 200
        //Offset -1, -1

        //Blend SrcAlpha OneMinusSrcAlpha
        //Blend One One
        //Blend SrcColor OneMinusSrcColor
        //Blend SrcColor One

        GrabPass{ "_SharedGrabTexture" }

        CGPROGRAM
        // Physically based Standard lighting model, and enable shadows on all light types
        #pragma surface surf StandardSpecular vertex:vert decal:add //alpha:blend

        // Use shader model 3.0 target, to get nicer looking lighting
        #pragma target 3.0

        //sampler2D _SharedGrabTexture;

        sampler2D _MainTex;

        sampler2D _BumpMap;

        sampler2D _SpecGlossMap;

        float _Specular, _Gloss;

        fixed4 _Color;

        struct Input {
            float2 uv_MainTex;
            float2 uv_BumpMap;
            float4 grabUV;
            float4 color: Color;
        };

        void vert(inout appdata_full v, out Input o) {
            float4 hpos = mul(UNITY_MATRIX_MVP, v.vertex);
            o.uv_MainTex = v.texcoord;
            o.uv_BumpMap = v.texcoord1;
            o.grabUV = ComputeGrabScreenPos(hpos);
            o.color = v.color;
        }

        void surf (Input IN, inout SurfaceOutputStandardSpecular o) {
            //fixed4 grab = tex2Dproj(_SharedGrabTexture, UNITY_PROJ_COORD(IN.grabUV))  * _Color;
            fixed4 c = tex2D(_MainTex, IN.uv_MainTex) * _Color  * IN.color;
            o.Albedo = c.rgb *  c.a;
            o.Alpha = c.a;
            o.Normal = UnpackNormal(tex2D(_BumpMap, IN.uv_BumpMap));
            half4 specGloss = tex2D(_SpecGlossMap, IN.uv_MainTex);

            o.Specular = specGloss.rgb *  c.a * _Specular;
            o.Smoothness = specGloss.a * _Gloss;
            //clip((c.a-0.5)*2);

        }
        ENDCG
    }
    FallBack "Decal/Transparent Diffuse"
}