把物体变灰代码分享

Shader "Shader_tex2D" {
        Properties {
                _MainTex ("Base (RGB)", 2D) = "white" {}
        }
        SubShader {
                Tags { "RenderType" = "Opaque" }
                LOD 200

                CGPROGRAM
                //声明表面着色函数并设置光照模式为Lambert(漫反射)
                #pragma surface surf Lambert
                sampler2D _MainTex;
                struct Input {
                        float2 uv_MainTex;
                };
                void surf (Input IN, inout SurfaceOutput o) {
                        half4 c = tex2D(_MainTex, IN.uv_MainTex);//从纹理中采样
                        c = float4(Luminance(c));//设置灰度值
                        o.Albedo = c.rgb;//设置反射光颜色
                        o.Alpha = c.a;
                }
                ENDCG
        }

Fallback "Diffuse"
       
} // shader