diff --git a/GLSL-shaders.md b/GLSL-shaders.md
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+Shader "Snow Plane"
+{
+    Properties
+    {
+        _Color ("Color", Color) = (1,1,1,1)
+        _BottomColor ("Bottom Color", Color) = (.8,.8,1,1)
+        _MainTex ("Albedo (RGB)", 2D) = "white" {}
+        _NormalMap ("Normal", 2D) = "white" {}
+        _Glossiness ("Smoothness", Range(0,1)) = 0.5
+        _Metallic ("Metallic", Range(0,1)) = 0.0
+        
+        _HeightMap ("Height Map", 2D) = "white" {}
+        _HeightAmount ("Height Amount", float) = 0.5
+        _TessellationAmount ("Tessellation Amount", Range(1,32)) = 8
+    }
+    SubShader
+    {
+        Tags { "RenderType"="Opaque" }
+        LOD 200
+
+        CGPROGRAM
+        // Physically based Standard lighting model, and enable shadows on all light types
+        #pragma surface surf Standard fullforwardshadows vertex:vert addshadow tessellate:tess nolightmap
+        
+        float _TessellationAmount;
+        float tess()
+        {
+            return _TessellationAmount;
+        }
+
+        #pragma target 4.6
+
+        sampler2D _MainTex;
+        sampler2D _NormalMap;
+        sampler2D _HeightMap;
+
+        struct Input
+        {
+            float2 uv_MainTex;
+        };
+
+        half _Glossiness;
+        half _Metallic;
+        fixed4 _Color;
+        fixed4 _BottomColor;
+        float _HeightAmount;
+
+        // 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_BUFFER_START(Props)
+            // put more per-instance properties here
+        UNITY_INSTANCING_BUFFER_END(Props)
+        
+        void vert(inout appdata_full v)
+        {
+            float offset = tex2Dlod(_HeightMap, float4(v.texcoord.xy, 0, 0)).r * _HeightAmount;
+            v.vertex.y += offset;
+        }
+
+        void surf(Input IN, inout SurfaceOutputStandard o)
+        {
+            // Albedo comes from a texture tinted by color
+            float height = tex2D(_HeightMap, IN.uv_MainTex).r;
+            fixed4 c = tex2D(_MainTex, IN.uv_MainTex) * lerp(_BottomColor, _Color, height);
+            o.Albedo = c.rgb;
+            o.Normal = tex2D(_NormalMap, IN.uv_MainTex);
+            // Metallic and smoothness come from slider variables
+            o.Metallic = _Metallic;
+            o.Smoothness = _Glossiness;
+            o.Alpha = c.a;
+        }
+        ENDCG
+    }
+    FallBack "Diffuse"
+}