diff --git a/src/render/software/CloudsRenderer.cpp b/src/render/software/CloudsRenderer.cpp
index 69286a6..b8ee363 100644
--- a/src/render/software/CloudsRenderer.cpp
+++ b/src/render/software/CloudsRenderer.cpp
@@ -9,6 +9,7 @@
 #include "CameraDefinition.h"
 
 #include "clouds/BaseCloudsModel.h"
+#include "clouds/CloudModelAltoCumulus.h"
 #include "clouds/CloudModelStratoCumulus.h"
 
 CloudsRenderer::CloudsRenderer(SoftwareRenderer* parent):
@@ -69,6 +70,8 @@ void CloudsRenderer::update()
             model = new CloudModelStratoCumulus(layer);
             break;
         case CloudLayerDefinition::ALTOCUMULUS:
+            model = new CloudModelAltoCumulus(layer);
+            break;
         case CloudLayerDefinition::ALTOSTRATUS:
         case CloudLayerDefinition::CUMULONIMBUS:
         case CloudLayerDefinition::CIRROCUMULUS:
diff --git a/src/render/software/clouds/CloudModelAltoCumulus.cpp b/src/render/software/clouds/CloudModelAltoCumulus.cpp
new file mode 100644
index 0000000..2e6b27f
--- /dev/null
+++ b/src/render/software/clouds/CloudModelAltoCumulus.cpp
@@ -0,0 +1,64 @@
+#include "CloudModelAltoCumulus.h"
+
+#include "NoiseGenerator.h"
+#include "Vector3.h"
+#include "CloudLayerDefinition.h"
+
+CloudModelAltoCumulus::CloudModelAltoCumulus(CloudLayerDefinition* layer):
+    BaseCloudsModel(layer)
+{
+    noise = new NoiseGenerator();
+}
+
+CloudModelAltoCumulus::~CloudModelAltoCumulus()
+{
+    delete noise;
+}
+
+void CloudModelAltoCumulus::update()
+{
+    noise->clearLevels();
+    noise->addLevelSimple(4.0, -1.0, 1.0);
+    noise->addLevelSimple(1.0 / 2.0, -0.6, 0.6);
+    noise->addLevelSimple(1.0 / 4.0, -0.3, 0.3);
+    noise->addLevelSimple(1.0 / 10.0, -0.15, 0.15);
+    noise->addLevelSimple(1.0 / 20.0, -0.09, 0.09);
+    noise->addLevelSimple(1.0 / 40.0, -0.06, 0.06);
+    noise->addLevelSimple(1.0 / 60.0, -0.03, 0.03);
+    noise->addLevelSimple(1.0 / 80.0, -0.015, 0.015);
+    noise->addLevelSimple(1.0 / 100.0, -0.06, 0.06);
+    noise->normalizeAmplitude(-4.0, 3.0, 0);
+    noise->setState(layer->getNoiseState());
+}
+
+void CloudModelAltoCumulus::getAltitudeRange(double *min_altitude, double *max_altitude) const
+{
+    *min_altitude = 15.0 + 10.0 * layer->altitude;
+    *max_altitude = *min_altitude + 18.0 * layer->scaling;
+}
+
+double CloudModelAltoCumulus::getDensity(const Vector3 &location) const
+{
+    double val;
+    double min_altitude, max_altitude;
+    double noise_scaling = 18.0 * layer->scaling;
+
+    getAltitudeRange(&min_altitude, &max_altitude);
+
+    if (location.y < min_altitude || location.y > max_altitude)
+    {
+        return 0.0;
+    }
+    else
+    {
+        double x = 0.6 * location.x / noise_scaling;
+        double y = (location.y - min_altitude) / noise_scaling;
+        double z = 0.6 * location.z / noise_scaling;
+
+        //double coverage = layer->coverage * layer->_coverage_by_altitude->getValue((position.y - layer->altitude) / layer->scaling);
+        double coverage = layer->coverage;
+
+        val = 0.5 * noise->get3DTotal(x, y, z);
+        return val - 1.1 + coverage;
+    }
+}
diff --git a/src/render/software/clouds/CloudModelAltoCumulus.h b/src/render/software/clouds/CloudModelAltoCumulus.h
new file mode 100644
index 0000000..f14890a
--- /dev/null
+++ b/src/render/software/clouds/CloudModelAltoCumulus.h
@@ -0,0 +1,29 @@
+#ifndef CLOUDMODELALTOCUMULUS_H
+#define CLOUDMODELALTOCUMULUS_H
+
+#include "../software_global.h"
+
+#include "BaseCloudsModel.h"
+
+namespace paysages {
+namespace software {
+
+class CloudModelAltoCumulus : public BaseCloudsModel
+{
+public:
+    CloudModelAltoCumulus(CloudLayerDefinition* layer);
+    virtual ~CloudModelAltoCumulus();
+
+    virtual void update() override;
+
+    virtual void getAltitudeRange(double *min_altitude, double *max_altitude) const override;
+    virtual double getDensity(const Vector3 &location) const override;
+
+private:
+    NoiseGenerator* noise;
+};
+
+}
+}
+
+#endif // CLOUDMODELALTOCUMULUS_H
diff --git a/src/render/software/software.pro b/src/render/software/software.pro
index ec32efa..f5afcfe 100644
--- a/src/render/software/software.pro
+++ b/src/render/software/software.pro
@@ -37,7 +37,8 @@ SOURCES += SoftwareRenderer.cpp \
     RenderArea.cpp \
     RayCastingManager.cpp \
     NightSky.cpp \
-    TerrainRayWalker.cpp
+    TerrainRayWalker.cpp \
+    clouds/CloudModelAltoCumulus.cpp
 
 HEADERS += SoftwareRenderer.h\
         software_global.h \
@@ -64,7 +65,8 @@ HEADERS += SoftwareRenderer.h\
     RenderArea.h \
     RayCastingManager.h \
     NightSky.h \
-    TerrainRayWalker.h
+    TerrainRayWalker.h \
+    clouds/CloudModelAltoCumulus.h
 
 unix:!symbian {
     maemo5 {