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diff --git a/indra/newview/app_settings/shaders/class3/deferred/skyV.glsl b/indra/newview/app_settings/shaders/class3/deferred/skyV.glsl
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+++ b/indra/newview/app_settings/shaders/class3/deferred/skyV.glsl
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+/** 
+ * @file advancedAtmoV.glsl
+ *
+ * $LicenseInfo:firstyear=2005&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2005, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+ 
+uniform vec3 cameraPosLocal;
+uniform mat4 modelview_projection_matrix;
+uniform mat4 modelview_matrix;
+uniform mat4 inv_proj;
+uniform mat4 inv_modelview;
+
+ATTRIBUTE vec3 position;
+
+// Inputs
+uniform vec3 camPosLocal;
+
+out vec3 view_pos;
+out vec3 view_dir;
+
+void main()
+{
+    // pass through untransformed fullscreen pos (clipspace)
+	gl_Position = vec4(position.xyz, 1.0);
+
+    view_pos = (inv_proj * vec4(position, 1.0f)).xyz;
+
+	// this will be normalized in the frag shader...
+	//view_dir = (inv_modelview * view_pos).xyz;
+    view_dir = view_pos - camPosLocal;
+}
+