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diff --git a/indra/newview/app_settings/shaders/class3/deferred/cloudsF.glsl b/indra/newview/app_settings/shaders/class3/deferred/cloudsF.glsl
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+/** 
+ * @file WLCloudsF.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
+ * $/LicenseInfo$
+ */
+ 
+#ifdef DEFINE_GL_FRAGCOLOR
+out vec4 frag_color;
+#else
+#define frag_color gl_FragColor
+#endif
+
+/////////////////////////////////////////////////////////////////////////
+// The fragment shader for the sky
+/////////////////////////////////////////////////////////////////////////
+
+VARYING vec4 vary_CloudColorSun;
+VARYING vec4 vary_CloudColorAmbient;
+VARYING float vary_CloudDensity;
+VARYING vec2 vary_texcoord0;
+VARYING vec2 vary_texcoord1;
+VARYING vec2 vary_texcoord2;
+VARYING vec2 vary_texcoord3;
+
+uniform sampler2D cloud_noise_texture;
+uniform sampler2D cloud_noise_texture_next;
+uniform float blend_factor;
+uniform vec4 cloud_pos_density1;
+uniform vec4 cloud_pos_density2;
+uniform vec4 gamma;
+
+vec4 cloudNoise(vec2 uv)
+{
+	vec4 a = texture2D(cloud_noise_texture, uv);
+	vec4 b = texture2D(cloud_noise_texture_next, uv);
+    vec4 samp = mix(a, b, blend_factor);
+	return samp;
+}
+
+
+/// Soft clips the light with a gamma correction
+vec3 scaleSoftClip(vec3 light) {
+	//soft clip effect:
+	light = 1. - clamp(light, vec3(0.), vec3(1.));
+	light = 1. - pow(light, gamma.xxx);
+
+	return light;
+}
+
+void main()
+{
+	// Set variables
+	vec2 uv1 = vary_texcoord0.xy;
+	vec2 uv2 = vary_texcoord1.xy;
+
+	vec4 cloudColorSun = vary_CloudColorSun;
+	vec4 cloudColorAmbient = vary_CloudColorAmbient;
+	float cloudDensity = vary_CloudDensity;
+	vec2 uv3 = vary_texcoord2.xy;
+	vec2 uv4 = vary_texcoord3.xy;
+
+	// Offset texture coords
+	uv1 += cloud_pos_density1.xy;	//large texture, visible density
+	uv2 += cloud_pos_density1.xy;	//large texture, self shadow
+	uv3 += cloud_pos_density2.xy;	//small texture, visible density
+	uv4 += cloud_pos_density2.xy;	//small texture, self shadow
+
+
+	// Compute alpha1, the main cloud opacity
+	float alpha1 = (cloudNoise(uv1).x - 0.5) + (cloudNoise(uv3).x - 0.5) * cloud_pos_density2.z;
+	alpha1 = min(max(alpha1 + cloudDensity, 0.) * 10. * cloud_pos_density1.z, 1.);
+
+	// And smooth
+	alpha1 = 1. - alpha1 * alpha1;
+	alpha1 = 1. - alpha1 * alpha1;	
+
+
+	// Compute alpha2, for self shadowing effect
+	// (1 - alpha2) will later be used as percentage of incoming sunlight
+	float alpha2 = (cloudNoise(uv2).x - 0.5);
+	alpha2 = min(max(alpha2 + cloudDensity, 0.) * 2.5 * cloud_pos_density1.z, 1.);
+
+	// And smooth
+	alpha2 = 1. - alpha2;
+	alpha2 = 1. - alpha2 * alpha2;	
+
+	// Combine
+	vec4 color;
+	color = (cloudColorSun*(1.-alpha2) + cloudColorAmbient);
+	color *= 2.;
+
+	/// Gamma correct for WL (soft clip effect).
+	frag_color.rgb = scaleSoftClip(color.rgb);
+	frag_color.a = alpha1;
+}
+