Unity Triplanar PBS Simple

Shader "Custom/TerrainShader" {
    Properties {
        _ColorLow ("_ColorLow", Color) = (0,1,0,1)
        _ColorHigh ("_ColorHigh", Color) = (1,1,1,1)
        _ColorSlope ("_ColorHigh", Color) = (1,0,0,1)
        _MainTex ("Albedo (RGB)", 2D) = "white" {}

        _BumpMap ("BumpMapLow", 2D) = "white" {}
        _BumpMapHigh ("BumpMapHigh", 2D) = "white" {}
        _BumpMapSlope ("BumpMapSlope", 2D) = "white" {}

        _Glossiness ("Smoothness", Range(0,1)) = 0.5
        _HeightFactor ("HeightFactor", Float) = 0.05
        _SlopeFactor ("SlopeFactor", Float) = 0.7
        //_Metallic ("Metallic", Range(0,1)) = 0.0
    }
    SubShader {
        Tags { "RenderType"="Opaque" }
        LOD 200

        CGPROGRAM
        // Physically based Standard lighting model, and enable shadows on all light types
        #pragma surface surf Standard

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

        fixed4 _ColorLow,_ColorHigh,_ColorSlope;
        sampler2D _MainTex,_BumpMap,_BumpMapHigh,_BumpMapSlope;
        float _HeightFactor,_SlopeFactor;

        struct Input {
            float2 uv_MainTex;
            float2 uv_BumpMap;
            float3 worldPos;
            float3 worldNormal; INTERNAL_DATA
        };

        half _Glossiness;
        half _Metallic;
        fixed4 _Color;

        void surf (Input IN, inout SurfaceOutputStandard o) {
            // Albedo comes from a texture tinted by color
            fixed4 col = tex2D (_MainTex, IN.uv_MainTex);

            float h = saturate(IN.worldPos.y*_HeightFactor);

            o.Normal = UnpackNormal ( lerp( tex2D (_BumpMap, IN.uv_BumpMap), tex2D (_BumpMapHigh, IN.uv_BumpMap), h ) );

            float3 worldNorm = WorldNormalVector (IN, o.Normal);

            float slope = abs( dot(worldNorm, float3(0,1,0) ) );

            fixed4 c = lerp( _ColorLow, _ColorHigh, h*h );

            if (slope > _SlopeFactor)
                c.rgb = c;
            else{
                c.rgb = lerp(col, c, slope*slope );

                o.Normal = UnpackNormal ( tex2D (_BumpMapSlope, IN.uv_MainTex) );

            }

            //o.Normal = worldNorm;

            o.Albedo = c.rgb;
            // Metallic and smoothness come from slider variables
            o.Metallic = 0.0;
            o.Smoothness = c.a*_Glossiness;
            o.Alpha = 1.0;
        }
        ENDCG
    }
    FallBack "Diffuse"
}