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diff --git a/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaBlendV.glsl b/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaBlendV.glsl
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+/**
+ * @file shadowAlphaMaskV.glsl
+ *
+ * $LicenseInfo:firstyear=2011&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2011, 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 mat4 texture_matrix0;
+uniform mat4 modelview_projection_matrix;
+uniform float shadow_target_width;
+
+ATTRIBUTE vec3 position;
+ATTRIBUTE vec4 diffuse_color;
+ATTRIBUTE vec2 texcoord0;
+
+#if !DEPTH_CLAMP
+VARYING float pos_zd2;
+#endif
+
+VARYING float pos_w;
+
+VARYING float target_pos_x;
+VARYING vec4 vertex_color;
+VARYING vec2 vary_texcoord0;
+
+void passTextureIndex();
+
+void main()
+{
+ //transform vertex
+ vec4 pre_pos = vec4(position.xyz, 1.0);
+ vec4 pos = modelview_projection_matrix * pre_pos;
+ target_pos_x = 0.5 * (shadow_target_width - 1.0) * pos.x;
+
+ pos_w = pos.w;
+
+#if !DEPTH_CLAMP
+ pos_zd2 = pos.z * 0.5;
+
+ gl_Position = vec4(pos.x, pos.y, pos.w*0.5, pos.w);
+#else
+ gl_Position = pos;
+#endif
+
+ passTextureIndex();
+
+ vary_texcoord0 = (texture_matrix0 * vec4(texcoord0,0,1)).xy;
+ vertex_color = diffuse_color;
+}