Add shaders

Sources/Shaders/EnviroShadowCookie.shader

@@ -0,0 +1,54 @@
+// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'
+
+Shader "Enviro/Standard/ShadowCookie"
+{
+	Properties
+	{
+		_MainTex ("Texture", 2D) = "white" {}
+	}
+	SubShader
+	{
+		// No culling or depth
+		Cull Off ZWrite Off ZTest Always
+
+		Pass
+		{
+			CGPROGRAM
+			#pragma vertex vert
+			#pragma fragment frag
+			#pragma target 2.0
+			#include "UnityCG.cginc"
+			#pragma exclude_renderers gles 
+			struct appdata
+			{
+				float4 vertex : POSITION;
+				float2 uv : TEXCOORD0;
+			};
+
+			struct v2f
+			{
+				float2 uv : TEXCOORD0;
+				float4 vertex : SV_POSITION;
+			};
+
+			v2f vert (appdata v)
+			{
+				v2f o;
+				o.vertex = UnityObjectToClipPos(v.vertex);
+				o.uv = v.uv;
+				return o;
+			}
+			
+			uniform sampler2D _MainTex;
+			uniform float _shadowIntensity;
+			uniform int _shadowMode;
+
+			fixed4 frag (v2f i) : SV_Target
+			{
+				fixed4 col = 1 - (tex2D(_MainTex, i.uv) * _shadowIntensity);
+				return float4(col.r,col.r,col.r,col.r);
+			}
+			ENDCG
+		}
+	}
+}