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Assets/CoolapeFrame/3rd/NGUI_Enhance/DepthMask/DepthMask.mat

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Assets/CoolapeFrame/3rd/NGUI_Enhance/DepthMask/DepthMask.shader

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+Shader "Depth Mask" {
+    SubShader {
+        Tags {"Queue" = "Geometry-10" }
+        Lighting Off
+        ZTest LEqual
+        ZWrite On
+        ColorMask 0
+        Pass {}
+    }
+}

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Assets/CoolapeFrame/3rd/NGUI_Enhance/DepthMask/readMe.txt

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+Unity3D 用Depth Mask实现的遮罩技术
+
+Unity3D 用Depth Mask实现的遮罩技术
+遮罩技术是一个基本的技术方法,有很多很多中用法.你可以在Flash中经常看到遮罩的使用,
+它可以另一些视觉元素更加惊艳.当我看到Unity中没有包含任何几何体和图片的遮罩技术
+很不爽,不过,幸运的我找到了解决方案,就是"Depth Mask"着色器.
+ 
+先看看着色器的代码,没错,非常短.
+
+Shader "Depth Mask" {
+
+    SubShader{
+        ColorMask 0
+        Pass {}
+    }
+}
+
+    如果用了多维材质,你需要像下面这样写:
+
+Shader "Depth Mask Complex"
+{
+    SubShader
+    {
+        Tags {"Queue" = "Background"}
+        Blend SrcAlpha OneMinusSrcAlpha
+        Lighting Off
+        ZWrite On
+        ZTest Always
+        Pass
+        {
+            Color(0,0,0,0)
+        }
+    }
+}
+
+如果你想更改任何一个物体材质的特性座遮罩(纹理,颜色等等)将是失败的,
+除非你用SetPass()去设置着色器,关于这个方法的文档在这
+(http://unity3d.com/support/documentation/ScriptReference/Material.SetPass.html).
+
+示例项目下载:http://pixelplacement.com/wp-content/uploads/2011/02/Masking.zip

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