Add shaders

Sources/Shaders/SnowParticleSurfaceShader.shader

@@ -0,0 +1,47 @@
+Shader "GlobalSnow/Snow Particle Surface Shader" {
+Properties {
+	_MainTex ("Particle Texture", 2D) = "white" {}
+	_InvFade ("Soft Particles Factor", Range(0.01,3.0)) = 1.0
+}
+
+Category {
+	Tags { "Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent" }
+	ColorMask RGB
+	Cull Off ZWrite Off
+
+	SubShader {
+		CGPROGRAM
+		#pragma surface surf Simple vertex:vert alpha
+		#pragma target 3.0
+
+		#include "UnityCG.cginc"
+
+		sampler2D _MainTex;
+		float _InvFade;
+
+		struct Input {
+			fixed4 color: COLOR;
+			float2 uv_MainTex;
+		};
+			
+		half4 LightingSimple(SurfaceOutput s, half3 lightDir, half atten) {
+			half4 c;
+			c.rgb = saturate(s.Albedo * _LightColor0.rgb * atten);
+			c.a = s.Alpha;
+			return c;
+		}
+
+		void vert(inout appdata_full v, out Input o) {
+			UNITY_INITIALIZE_OUTPUT(Input, o);
+			o.color = v.color;
+		}
+			
+		void surf(Input IN, inout SurfaceOutput o) {
+			fixed4 co = tex2D(_MainTex, IN.uv_MainTex);
+			o.Albedo = co.rgb;
+			o.Alpha = co.a * IN.color.a;
+		}
+		ENDCG 
+	}
+}
+}