Shader "Custom/Blocks" {

    Properties {

        _Color ("Color", Color) = (,,,)

        _MainTex ("Albedo (RGB)", 2D) = "white" {}

        _Glossiness ("Smoothness", Range(,)) = 0.5

        _Metallic ("Metallic", Range(,)) = 0.0

    }

    SubShader {

        Tags { "RenderType"="Opaque" "Queue" = "Transparent" }

        LOD

            //Cull front

            Blend SrcAlpha OneMinusSrcAlpha

        CGPROGRAM

        // Physically based Standard lighting model, and enable shadows on all light types

        #pragma surface surf Standard fullforwardshadows alpha

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

        #pragma target 3.0

        sampler2D _MainTex;

        struct Input {

            float2 uv_MainTex;

        };

        half _Glossiness;

        half _Metallic;

        fixed4 _Color;

        // Add instancing support for this shader. You need to check 'Enable Instancing' on materials that use the shader.

        // See https://docs.unity3d.com/Manual/GPUInstancing.html for more information about instancing.

        // #pragma instancing_options assumeuniformscaling

        UNITY_INSTANCING_CBUFFER_START(Props)

            // put more per-instance properties here

        UNITY_INSTANCING_CBUFFER_END

        void surf (Input IN, inout SurfaceOutputStandard o) {

            // Albedo comes from a texture tinted by color

            fixed4 c = _Color;// tex2D(_MainTex, IN.uv_MainTex) * _Color;

            o.Albedo = c.rgb;

            // Metallic and smoothness come from slider variables

            o.Metallic = _Metallic;

            o.Smoothness = _Glossiness;

            o.Alpha = c.a;

        }

        ENDCG

    }

    FallBack "Diffuse"

}