Simple 2-sided cutout surface shader for Unity with bumpmap support

DoubleSidedCutoutSurfaceShader.shader

Shader "Kio/DoubleSidedCutoutSurfaceShader"
{
    Properties
    {
        _Color ("Color", Color) = (1,1,1,1)
        _MainTex ("Albedo (RGB)", 2D) = "white" {}
        _BumpMap ("Normal Map", 2D) = "bump" {}
        _Glossiness ("Smoothness", Range(0,1)) = 0.5
        _Metallic ("Metallic", Range(0,1)) = 0.0
        _Cutoff ("Alpha Cutoff", Range(0,1)) = 0.5
    }
    SubShader
    {
        Tags { "RenderType"="TransparentCutout" "Queue"="AlphaTest" }
        LOD 200
        Cull Back
        ZWrite On
        ZTest LEqual

        CGPROGRAM
        #pragma surface surf Standard fullforwardshadows alpha:fade
        #pragma target 3.0

        sampler2D _MainTex;
        sampler2D _BumpMap;
        float _Cutoff;

        struct Input
        {
            float2 uv_MainTex;
            float2 uv_BumpMap;
        };

        half _Glossiness;
        half _Metallic;
        fixed4 _Color;

        UNITY_INSTANCING_BUFFER_START(Props)
        UNITY_INSTANCING_BUFFER_END(Props)

        void surf (Input IN, inout SurfaceOutputStandard o)
        {
            fixed4 c = tex2D(_MainTex, IN.uv_MainTex) * _Color;
            clip(c.a - _Cutoff);
            o.Albedo = c.rgb;
            o.Normal = UnpackNormal(tex2D(_BumpMap, IN.uv_BumpMap));
            o.Metallic = _Metallic;
            o.Smoothness = _Glossiness;
            o.Alpha = c.a;
        }
        ENDCG

        Tags { "RenderType" = "TransparentCutout" "Queue"="AlphaTest" }
        Cull Front
        ZWrite On
        ZTest LEqual

        CGPROGRAM
        #pragma surface surf Standard fullforwardshadows alpha:fade
        #pragma vertex vert
        #pragma target 3.0

        sampler2D _MainTex;
        sampler2D _BumpMap;
        float _Cutoff;

        struct Input
        {
            float2 uv_MainTex;
            float2 uv_BumpMap;
        };

        half _Glossiness;
        half _Metallic;
        fixed4 _Color;

        UNITY_INSTANCING_BUFFER_START(Props)
        UNITY_INSTANCING_BUFFER_END(Props)

        void vert(inout appdata_full v, out Input o)
        {
            UNITY_INITIALIZE_OUTPUT(Input, o);
            v.normal = -v.normal; // Flip normal for back face
        }

        void surf(Input IN, inout SurfaceOutputStandard o)
        {
            fixed4 c = tex2D(_MainTex, IN.uv_MainTex) * _Color;
            clip(c.a - _Cutoff);
            o.Albedo = c.rgb;
            o.Normal = UnpackNormal(tex2D(_BumpMap, IN.uv_BumpMap));
            o.Metallic = _Metallic;
            o.Smoothness = _Glossiness;
            o.Alpha = c.a;
        }
        ENDCG
    }
    FallBack "Diffuse"
}