diff --git a/TODO b/TODO
index f8dad19..4d03b12 100644
--- a/TODO
+++ b/TODO
@@ -1,10 +1,9 @@
 Technology Preview 2 :
 - Fix the fog impression when cloud layer overlaps with ground range.
+- Remove color gradations (replace with automatic boolean and simple colors).
 - Replace zone ranges with curves (with curve input and curve dialog).
 - Interface for textures thickness, slope_range and thickness_transparency (and correct slider ranges).
 - Render tab previews should not rerender when changing render options.
-- Compute shadows only once for all textures at a same location.
-   => Add an intermediary light status (two pass lighting).
 - Add layer sorting/naming.
 - Disable specular lighting in explorer (and everything camera dependent).
 - Add logarithmic sliders for some float values.
diff --git a/gui_qt/baseexplorerchunk.cpp b/gui_qt/baseexplorerchunk.cpp
index 02dbc3d..6635e10 100644
--- a/gui_qt/baseexplorerchunk.cpp
+++ b/gui_qt/baseexplorerchunk.cpp
@@ -70,7 +70,7 @@ bool BaseExplorerChunk::maintain()
 
 void BaseExplorerChunk::updatePriority(CameraDefinition* camera)
 {
-    if (_reset_needed || (_texture_max_size > 0 && _texture_current_size == 0))
+    if (_reset_needed || (_texture_max_size > 1 && _texture_current_size <= 1))
     {
         priority = 1000.0;
     }
diff --git a/gui_qt/formsky.cpp b/gui_qt/formsky.cpp
index b7c5fac..9148641 100644
--- a/gui_qt/formsky.cpp
+++ b/gui_qt/formsky.cpp
@@ -27,6 +27,7 @@ public:
 protected:
     QColor getColor(double x, double y)
     {
+        y -= 100.0 * scaling;
         if (y > 0.0)
         {
             return QColor(0, 0, 0);
@@ -66,6 +67,7 @@ public:
 protected:
     QColor getColor(double x, double y)
     {
+        y -= 100.0 * scaling;
         if (y > 0.0)
         {
             return QColor(0, 0, 0);
diff --git a/i18n/paysages_fr.ts b/i18n/paysages_fr.ts
index 44bb748..9c8ebea 100644
--- a/i18n/paysages_fr.ts
+++ b/i18n/paysages_fr.ts
@@ -555,57 +555,57 @@ Maintenir Ctrl : Plus rapide</translation>
 <context>
     <name>FormSky</name>
     <message>
-        <location filename="../gui_qt/formsky.cpp" line="101"/>
+        <location filename="../gui_qt/formsky.cpp" line="103"/>
         <source>West preview</source>
         <translation>Aperçu de l&apos;ouest</translation>
     </message>
     <message>
-        <location filename="../gui_qt/formsky.cpp" line="103"/>
+        <location filename="../gui_qt/formsky.cpp" line="105"/>
         <source>East preview</source>
         <translation>Aperçu de l&apos;est</translation>
     </message>
     <message>
-        <location filename="../gui_qt/formsky.cpp" line="105"/>
+        <location filename="../gui_qt/formsky.cpp" line="107"/>
         <source>Day time</source>
         <translation>Heure du jour</translation>
     </message>
     <message>
-        <location filename="../gui_qt/formsky.cpp" line="106"/>
+        <location filename="../gui_qt/formsky.cpp" line="108"/>
         <source>Sun color</source>
         <translation>Couleur du soleil</translation>
     </message>
     <message>
-        <location filename="../gui_qt/formsky.cpp" line="107"/>
+        <location filename="../gui_qt/formsky.cpp" line="109"/>
         <source>Sun radius</source>
         <translation>Diamètre apparent du soleil</translation>
     </message>
     <message>
-        <location filename="../gui_qt/formsky.cpp" line="108"/>
+        <location filename="../gui_qt/formsky.cpp" line="110"/>
         <source>Sun halo radius</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../gui_qt/formsky.cpp" line="109"/>
+        <location filename="../gui_qt/formsky.cpp" line="111"/>
         <source>Sun halo profile</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../gui_qt/formsky.cpp" line="110"/>
+        <location filename="../gui_qt/formsky.cpp" line="112"/>
         <source>Zenith color</source>
         <translation>Couleur du ciel au zénith</translation>
     </message>
     <message>
-        <location filename="../gui_qt/formsky.cpp" line="111"/>
+        <location filename="../gui_qt/formsky.cpp" line="113"/>
         <source>Haze color</source>
         <translation>Couleur de la brume</translation>
     </message>
     <message>
-        <location filename="../gui_qt/formsky.cpp" line="112"/>
+        <location filename="../gui_qt/formsky.cpp" line="114"/>
         <source>Haze height</source>
         <translation>Hauteur apparente de la brume</translation>
     </message>
     <message>
-        <location filename="../gui_qt/formsky.cpp" line="113"/>
+        <location filename="../gui_qt/formsky.cpp" line="115"/>
         <source>Haze smoothing</source>
         <translation>Facteur de lissage de la brume</translation>
     </message>
diff --git a/lib_paysages/textures.c b/lib_paysages/textures.c
index 4a7522b..9fd4cfb 100644
--- a/lib_paysages/textures.c
+++ b/lib_paysages/textures.c
@@ -336,17 +336,17 @@ double texturesGetLayerCoverage(TextureLayerDefinition* definition, Renderer* re
     return zoneGetValue(definition->zone, base.location, base.normal);
 }
 
-static inline Color _getLayerColor(Renderer* renderer, TextureResult result)
+static inline Color _getLayerColor(Renderer* renderer, TextureResult result, LightStatus* light)
 {
-    LightStatus light;
-    
-    renderer->getLightStatus(renderer, &light, result.location);
-    return renderer->applyLightStatus(renderer, &light, result.location, result.normal, result.definition->material);
+    return renderer->applyLightStatus(renderer, light, result.location, result.normal, result.definition->material);
 }
 
 Color texturesGetLayerColor(TextureLayerDefinition* definition, Renderer* renderer, Vector3 location, double detail)
 {
-    return _getLayerColor(renderer, _getLayerResult(definition, renderer, location.x, location.z, detail));
+    LightStatus light;
+    TextureResult result = _getLayerResult(definition, renderer, location.x, location.z, detail);
+    renderer->getLightStatus(renderer, &light, result.location);
+    return _getLayerColor(renderer, result, &light);
 }
 
 Color texturesGetColor(TexturesDefinition* definition, Renderer* renderer, double x, double z, double detail)
@@ -356,8 +356,6 @@ Color texturesGetColor(TexturesDefinition* definition, Renderer* renderer, doubl
     double thickness, last_height;
     int i, start;
 
-    /* TODO Optimize : each layer computes the same shadows */
-    
     detail *= 0.1;
     
     results[0] = _getTerrainResult(renderer, x, z, detail);
@@ -403,9 +401,11 @@ Color texturesGetColor(TexturesDefinition* definition, Renderer* renderer, doubl
     }
 
     /* Apply colors and alphas */
+    LightStatus light;
+    renderer->getLightStatus(renderer, &light, results[start].location);
     if (results[start].definition)
     {
-        result = _getLayerColor(renderer, results[start]);
+        result = _getLayerColor(renderer, results[start], &light);
     }
     else
     {
@@ -417,7 +417,7 @@ Color texturesGetColor(TexturesDefinition* definition, Renderer* renderer, doubl
         {
             if (results[i].definition)
             {
-                color = _getLayerColor(renderer, results[i]);
+                color = _getLayerColor(renderer, results[i], &light);
                 color.a = results[i].thickness;
             }
             else