Detail Texture

Shader "zff/Detail"
{
    Properties
    {
        _MainTex("Texture",2D)="white"{}
        _BumpMap("BumpMap",2D)="bump"{}
        _Detail("Detail",2D)="gray"{}
    }
    SubShader
    {
        Tags{"RenderType"="Opaque"}
        CGPROGRAM
        #pragma surface surf Lambert
        struct Input
        {
            float2 uv_MainTex;
            float2 uv_BumpMap;
            float2 uv_Detail;
        };
        sampler2D _MainTex;
        sampler2D _BumpMap;
        sampler2D _Detail;
        void surf(Input IN,inout SurfaceOutput o)
        {
            o.Albedo = tex2D(_MainTex,IN.uv_MainTex).rgb;
            o.Albedo *= tex2D(_Detail,IN.uv_Detail).rgb * 2;
            o.Normal = UnpackNormal(tex2D(_BumpMap,IN.uv_BumpMap));
        }
        ENDCG
    }
    Fallback "Diffuse"
}