今天美術想把高光貼圖引數合成到Main貼圖中，減少貼圖數，挺好，知道省記憶體了。 於是簡單改了改surface著色器。 Shader "Custom/HighLightByAlphaPass" {
    Properties {
         _MainTex ("Base (RGBA A--HighLight)", 2D) = "white" {}
         _MainColor("Diffuse",Color) = (1,1,1,1)
         _SpecColor("Specular Color", Color) = (1, 1, 1, 1)
  　　_Gloss("Gloss", Range(0.01, 10)) = 0.5
    }
    SubShader {
        Tags { "RenderType"="Opaque" }
        LOD 200         CGPROGRAM
        #pragma surface surf BlinnPhong         sampler2D _MainTex;
        float _SpecularPower;
 　   float _Gloss;
       float _Spec;
       float4 _MainColor;         struct Input {
            float2 uv_MainTex;
        };         void surf (Input IN, inout SurfaceOutput o) {
            float4 c = tex2D (_MainTex, IN.uv_MainTex);
            o.Specular = c.a;
  　　   o.Gloss = _Gloss;
            o.Albedo = c.rgb * _MainColor.rgb;
        }
        ENDCG
    }
    FallBack "Diffuse"
}