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diff --git a/indra/newview/app_settings/shaders/class3/deferred/lightUtil.glsl b/indra/newview/app_settings/shaders/class3/deferred/lightUtil.glsl
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+/** 
+ * @file lightInfo.glsl
+ *
+ * $LicenseInfo:firstyear=2007&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2007, 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
+ * $/LicenseInfo$
+ */
+
+struct DirectionalLightInfo
+{
+    vec4 pos;
+    float depth;
+    vec4 normal;
+    vec3 normalizedLightDirection;
+    vec3 normalizedToLight;
+    float lightIntensity;
+    vec3 lightDiffuseColor;
+    float specExponent;
+    float shadow;
+};
+
+struct SpotLightInfo
+{
+    vec4 pos;
+    float depth;
+    vec4 normal;
+    vec3 normalizedLightDirection;
+    vec3 normalizedToLight;
+    float lightIntensity;
+    float attenuation;
+    float distanceToLight;
+    vec3 lightDiffuseColor;
+    float innerHalfAngleCos;
+    float outerHalfAngleCos;
+    float spotExponent;
+    float specExponent;
+    float shadow;
+};
+
+struct PointLightInfo
+{
+    vec4 pos;
+    float depth;
+    vec4 normal;
+    vec3 normalizedToLight;
+    float lightIntensity;
+    float attenuation;
+    float distanceToLight;
+    vec3 lightDiffuseColor;
+    float lightRadius;
+    float specExponent;
+    vec3 worldspaceLightDirection;
+    float shadow;
+};
+
+float attenuate(float attenuationSelection, float distanceToLight)
+{
+// LLRENDER_REVIEW
+// sh/could eventually consume attenuation func defined in texture
+    return (attenuationSelection == 0.0f) ? 1.0f : // none
+           (attenuationSelection <  1.0f) ? (1.0f / distanceToLight) : // linear atten 
+           (attenuationSelection <  2.0f) ? (1.0f / (distanceToLight*distanceToLight)) // quadratic atten
+										  : (1.0f / (distanceToLight*distanceToLight*distanceToLight));	// cubic atten    
+}
+
+
+vec3 lightDirectional(struct DirectionalLightInfo dli)
+{
+    float lightIntensity = dli.lightIntensity;
+	lightIntensity *= dot(dli.normal.xyz, dli.normalizedLightDirection);
+    //lightIntensity *= directionalShadowSample(vec4(dli.pos.xyz, 1.0f), dli.depth, dli.directionalShadowMap, dli.directionalShadowMatrix);
+	return lightIntensity * dli.lightDiffuseColor;
+}
+
+
+vec3 lightSpot(struct SpotLightInfo sli)    
+{
+	float penumbraRange = (sli.outerHalfAngleCos - sli.innerHalfAngleCos);
+    float coneAngleCos = max(dot(sli.normalizedLightDirection, sli.normalizedToLight), 0.0);
+	float coneAttenFactor = (coneAngleCos <= sli.outerHalfAngleCos) ? 1.0f : pow(smoothstep(1,0, sli.outerHalfAngleCos / penumbraRange), sli.spotExponent);
+    float distanceAttenuation = attenuate(sli.attenuation, sli.distanceToLight);
+    float lightIntensity = sli.lightIntensity;
+    lightIntensity *= distanceAttenuation;
+	lightIntensity *= max(dot(sli.normal.xyz, sli.normalizedLightDirection), 0.0);
+	lightIntensity *= coneAttenFactor;
+    lightIntensity *= sli.shadow;
+	return lightIntensity * sli.lightDiffuseColor;
+}
+
+vec3 lightPoint(struct PointLightInfo pli)
+{
+    float padRadius = pli.lightRadius * 0.1; // distance for which to perform smoothed dropoff past light radius
+	float distanceAttenuation =	attenuate(pli.attenuation, pli.distanceToLight);
+    float lightIntensity = pli.lightIntensity;
+    lightIntensity*= distanceAttenuation;    
+	lightIntensity *= clamp((padRadius - pli.distanceToLight + pli.lightRadius) / padRadius, 0.0, 1.0);
+    lightIntensity *= pli.shadow;
+    lightIntensity *= max(dot(pli.normal.xyz, pli.normalizedToLight), 0.0);
+	return lightIntensity * pli.lightDiffuseColor;
+}