Upgraded original RothenburgAR to Unity version 2017.4.5f1 (and upgrading from standalone vuforia to the version integrated in unity)

Assets/Vuforia/Shaders/DepthMask.shader

@@ -0,0 +1,43 @@
+//===============================================================================
+//Copyright (c) 2015 PTC Inc. All Rights Reserved.
+//
+//Confidential and Proprietary - Protected under copyright and other laws.
+//Vuforia is a trademark of PTC Inc., registered in the United States and other
+//countries.
+//===============================================================================
+//===============================================================================
+//Copyright (c) 2010-2014 Qualcomm Connected Experiences, Inc.
+//All Rights Reserved.
+//Confidential and Proprietary - Qualcomm Connected Experiences, Inc.
+//===============================================================================
+
+Shader "DepthMask" {
+   
+    SubShader {
+        // Render the mask after regular geometry, but before masked geometry and
+        // transparent things.
+       
+        Tags {"Queue" = "Geometry-10" }
+       
+        // Turn off lighting, because it's expensive and the thing is supposed to be
+        // invisible anyway.
+       
+        Lighting Off
+
+        // Draw into the depth buffer in the usual way.  This is probably the default,
+        // but it doesn't hurt to be explicit.
+
+        ZTest LEqual
+        ZWrite On
+
+        // Don't draw anything into the RGBA channels. This is an undocumented
+        // argument to ColorMask which lets us avoid writing to anything except
+        // the depth buffer.
+
+        ColorMask 0
+
+        // Do nothing specific in the pass:
+
+        Pass {}
+    }
+}