Fix fireflies.

Author: mororo250

sandbox/settings/appleseed.studio.xml

@@ -10,16 +10,6 @@
         <parameter name="tile_ordering" value="spiral" />
     </parameters>
     <parameters name="ui">
-        <parameters name="file_dialog">
-            <parameters name="frames">
-                <parameter name="last_directory" value="C:\Users\joao_\OneDrive\Imagens" />
-                <parameter name="selected_filter" value="JPEG Files (*.jpg *.jpe *.jpeg *.jif *.jfif *.jfi)" />
-            </parameters>
-            <parameters name="projects">
-                <parameter name="last_directory" value="D:\appleseed-scenes" />
-                <parameter name="selected_filter" value="Plain Project Files (*.appleseed)" />
-            </parameters>
-        </parameters>
         <parameters name="render_region">
             <parameter name="triggers_rendering" value="true" />
         </parameters>

src/appleseed/foundation/image/colorspace.cpp

@@ -1485,7 +1485,7 @@ LightingConditions::LightingConditions(
     m_cmf_reflectance[31].set(0.0f);
 
     const float reflectance_normalizer = get_cmf_normalizer(m_cmf_reflectance);
-    // Adjust brightness for coherence with linear to rgb function.
+    // Adjust the brightness for coherence with linear_rgb_to_spectrum function.
     const float illuminance_normalizer = 1 / 100.0f;
 
     // Normalize color matching functions.

src/appleseed/renderer/modeling/environmentedf/hosekenvironmentedf.cpp

@@ -233,8 +233,14 @@ namespace
                 compute_ground_color(shading_context, shifted_outgoing, radiance);
 
             value.set(radiance, g_std_lighting_conditions, Spectrum::Illuminance);
-            value += sun_value;
+
             probability = shifted_outgoing.y > 0.0f ? shifted_outgoing.y * RcpPi<float>() : 0.0f;
+            if (sun_value != Spectrum(0.0f))
+            {
+                probability *= sun_value.illuminance_to_ciexyz(g_std_lighting_conditions)[1]
+                    / value.illuminance_to_ciexyz(g_std_lighting_conditions)[1];
+                value += sun_value;
+            }
             assert(probability >= 0.0f);
         }
 

src/appleseed/renderer/modeling/environmentedf/preethamenvironmentedf.cpp

@@ -227,8 +227,13 @@ namespace
             else radiance.set(0.0f);
 
             value.set(radiance, g_std_lighting_conditions, Spectrum::Illuminance);
-            value += sun_value;
             probability = shifted_outgoing.y > 0.0f ? shifted_outgoing.y * RcpPi<float>() : 0.0f;
+            if (sun_value != Spectrum(0.0f))
+            {
+                probability *= sun_value.illuminance_to_ciexyz(g_std_lighting_conditions)[1]
+                    / value.illuminance_to_ciexyz(g_std_lighting_conditions)[1];
+                value += sun_value;
+            }
             assert(probability >= 0.0f);
         }