Shader "Custom/VertexColors" {
    Properties{
        _Color("Color", Color) = (1,1,1,1)
        _MainTex("Albedo (RGB)", 2D) = "white" {}
        _Glossiness("Smoothness", Range(0,1)) = 0.5
        _Metallic("Metallic", Range(0,1)) = 0.0
    }
        SubShader{
            Tags { "RenderType" = "Opaque" }
            LOD 200

            CGPROGRAM

            #pragma surface surf Standard fullforwardshadows
            #pragma target 3.0

            sampler2D _MainTex;

            struct Input {
                float2 uv_MainTex;
                float4 vertColor : COLOR;
            };

            half _Glossiness;
            half _Metallic;
            fixed4 _Color;

            void surf(Input IN, inout SurfaceOutputStandard o) {
                fixed4 c = IN.vertColor;
                o.Albedo = c.rgb;
                if (c.r == 1.0 && c.g == 1.0 && c.b == 1.0) {
                    o.Albedo = _Color.rgb;
                }
                o.Metallic = _Metallic;
                o.Smoothness = _Glossiness;
                o.Alpha = c.a;
            }
            ENDCG
        }
            FallBack "Diffuse"
}