Add shaders

Sources/Shaders/EraseShader.shader

@@ -0,0 +1,65 @@
+Shader "GlobalSnow/EraseShader" {
+Properties {
+}
+
+SubShader {
+	Tags { "RenderType"="Opaque" "DisableBatching"="True" }
+    Cull [_EraseCullMode]
+	Pass {
+
+	CGPROGRAM
+	#pragma vertex vert
+	#pragma fragment frag
+	#include "UnityCG.cginc"
+	#include "GlobalSnowForwardOptions.cginc"
+    
+	struct v2f {
+    	float4 pos : SV_POSITION;
+	};
+
+	v2f vert( appdata_base v ) {
+	    v2f o;
+        APPLY_VERTEX_MODIFIER(v)
+		o.pos = UnityObjectToClipPos(v.vertex);
+	    return o;
+	}
+	
+	fixed4 frag(v2f i) : SV_Target {
+		return fixed4(0,0,0,0);
+	}
+	ENDCG
+	}
+	
+}
+
+SubShader {
+	Tags { "RenderType"="TransparentCutout" "DisableBatching"="True" }
+	Cull [_EraseCullMode]
+	Pass {
+
+	CGPROGRAM
+	#pragma vertex vert
+	#pragma fragment frag
+	#include "UnityCG.cginc"
+	#include "GlobalSnowForwardOptions.cginc"
+    
+	struct v2f {
+    	float4 pos : SV_POSITION;
+	};
+
+	v2f vert( appdata_base v ) {
+	    v2f o;
+        APPLY_VERTEX_MODIFIER(v)
+		o.pos = UnityObjectToClipPos(v.vertex);
+	    return o;
+	}
+	
+	fixed4 frag(v2f i) : SV_Target {
+		return fixed4(0,0,0,0);
+	}
+	ENDCG
+	}
+}
+
+Fallback Off
+}