3 files changed, 52 insertions, 7 deletions
diff --git a/indra/llrender/llatmosphere.cpp b/indra/llrender/llatmosphere.cpp
index 644e102a15..4edfd9efe9 100644
--- a/indra/llrender/llatmosphere.cpp
+++ b/indra/llrender/llatmosphere.cpp
@@ -132,6 +132,46 @@ AtmosphericModelSettings::AtmosphericModelSettings(
 {
 }
 
+bool AtmosphericModelSettings::operator==(const AtmosphericModelSettings& rhs) const
+{
+    if (m_skyBottomRadius != rhs.m_skyBottomRadius)
+    {
+        return false;
+    }
+
+    if (m_skyTopRadius != rhs.m_skyTopRadius)
+    {
+        return false;
+    }
+
+    if (m_sunArcRadians != rhs.m_sunArcRadians)
+    {
+        return false;
+    }
+
+    if (m_mieAnisotropy != rhs.m_mieAnisotropy)
+    {
+        return false;
+    }
+
+    if (m_rayleighProfile != rhs.m_rayleighProfile)
+    {
+        return false;
+    }
+
+    if (m_mieProfile != rhs.m_mieProfile)
+    {
+        return false;
+    }
+
+    if (m_absorptionProfile != rhs.m_absorptionProfile)
+    {
+        return false;
+    }
+
+    return true;
+}
+
 void LLAtmosphere::initClass()
 {
     if (!gAtmosphere)
@@ -192,9 +232,10 @@ LLAtmosphere::~LLAtmosphere()
 
 bool LLAtmosphere::configureAtmosphericModel(AtmosphericModelSettings& settings)
 {
-// Advanced Atmospherics TODO
-// Make this store a hash of the precomputed data
-// and avoid redundant calcs for identical settings
+    if ((m_model != nullptr) && (settings == m_settings))
+    {
+        return true;
+    }
 
     if (m_model)
     {
diff --git a/indra/llrender/llatmosphere.h b/indra/llrender/llatmosphere.h
index 0d62a069ac..a010803595 100644
--- a/indra/llrender/llatmosphere.h
+++ b/indra/llrender/llatmosphere.h
@@ -52,6 +52,8 @@ public:
         F32             sunArcRadians,
         F32             mieAniso);
 
+    bool operator==(const AtmosphericModelSettings& rhs) const;
+
     F32             m_skyBottomRadius;
     F32             m_skyTopRadius;
     DensityProfile  m_rayleighProfile;
@@ -107,6 +109,8 @@ protected:
     std::vector<double> m_mie_extinction;
     std::vector<double> m_absorption_extinction;
     std::vector<double> m_ground_albedo;
+
+    AtmosphericModelSettings m_settings;
 };
 
 extern LLAtmosphere* gAtmosphere;
diff --git a/indra/newview/app_settings/shaders/class3/deferred/skyF.glsl b/indra/newview/app_settings/shaders/class3/deferred/skyF.glsl
index 0fb990611e..43c0505046 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/skyF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/skyF.glsl
@@ -60,17 +60,17 @@ void main()
     vec3 radiance_sun = GetSkyLuminance(camPos, view_direction, 0.0f, sun_direction, transmittance);
     vec3 radiance2_sun = GetSunAndSkyIlluminance(camPos, view_direction, sun_direction, sky_illum);
 
-    radiance *= transmittance;
+    radiance_sun *= transmittance;
 
     vec3 solar_luminance = transmittance * GetSolarLuminance();
 
     // If the view ray intersects the Sun, add the Sun radiance.
     if (dot(view_direction, sun_direction) >= sun_size)
     {
-        radiance = radiance + solar_luminance;
+        radiance_sun = radiance_sun + solar_luminance;
     }
 
-    vec3 color = radiance;
+    vec3 color = radiance_sun;
     
     color = vec3(1.0) - exp(-color * 0.0001);
 
@@ -79,7 +79,7 @@ void main()
 
     frag_color.rgb = color;
     //frag_color.rgb = vec3(dot(view_direction, sun_direction) > 0.95f ? 1.0 : 0.0, 0,0);
-    frag_color.rgb = normalize(view_pos);
+    //frag_color.rgb = normalize(view_pos);
 
     frag_color.a = 1.0;
 }