diff --git a/src/basics/Color.h b/src/basics/Color.h
index e851cc4..bc3e83f 100644
--- a/src/basics/Color.h
+++ b/src/basics/Color.h
@@ -9,7 +9,7 @@ namespace basics {
 class BASICSSHARED_EXPORT Color
 {
 public:
-    Color();
+    Color() = default;
     Color(const Color &col);
     Color(double r, double g, double b, double a=1.0);
 
diff --git a/src/basics/Color.inline.cpp b/src/basics/Color.inline.cpp
index 1f38abc..c72de09 100644
--- a/src/basics/Color.inline.cpp
+++ b/src/basics/Color.inline.cpp
@@ -12,11 +12,6 @@
 # define METHSPEC
 #endif
 
-METHSPEC Color::Color():
-    r(0.0), g(0.0), b(0.0), a(0.0)
-{
-}
-
 METHSPEC Color::Color(double r, double g, double b, double a):
     r(r), g(g), b(b), a(a)
 {
diff --git a/src/basics/Vector3.h b/src/basics/Vector3.h
index 797e8c1..778f69d 100644
--- a/src/basics/Vector3.h
+++ b/src/basics/Vector3.h
@@ -43,7 +43,7 @@ typedef struct
 class BASICSSHARED_EXPORT Vector3
 {
 public:
-    Vector3();
+    Vector3() = default;
     Vector3(double x, double y, double z);
     Vector3(const VectorSpherical &v);
 
diff --git a/src/basics/Vector3.inline.cpp b/src/basics/Vector3.inline.cpp
index 7d2e6a5..38f0f7f 100644
--- a/src/basics/Vector3.inline.cpp
+++ b/src/basics/Vector3.inline.cpp
@@ -14,10 +14,6 @@ METHSPEC Vector3::Vector3(double x, double y, double z):
 {
 }
 
-METHSPEC Vector3::Vector3()
-{
-}
-
 METHSPEC Vector3 Vector3::add(double x, double y, double z) const
 {
     return Vector3(this->x + x, this->y + y, this->z + z);
diff --git a/src/render/software/CanvasFragment.cpp b/src/render/software/CanvasFragment.cpp
index 20ce8a0..dcef1e0 100644
--- a/src/render/software/CanvasFragment.cpp
+++ b/src/render/software/CanvasFragment.cpp
@@ -1,9 +1,5 @@
 #include "CanvasFragment.h"
 
-CanvasFragment::CanvasFragment()
-{
-}
-
 CanvasFragment::CanvasFragment(double z, const Vector3 &location, int client, bool opaque):
     opaque(opaque), z(z), location(location), client(client)
 {
diff --git a/src/render/software/CanvasFragment.h b/src/render/software/CanvasFragment.h
index 520415c..cb328cc 100644
--- a/src/render/software/CanvasFragment.h
+++ b/src/render/software/CanvasFragment.h
@@ -15,7 +15,7 @@ namespace software {
 class SOFTWARESHARED_EXPORT CanvasFragment
 {
 public:
-    CanvasFragment();
+    CanvasFragment() = default;
     CanvasFragment(double z, const Vector3 &location, int client=0, bool opaque=true);
 
     void setColor(const Color &col);
diff --git a/src/render/software/CanvasPixel.cpp b/src/render/software/CanvasPixel.cpp
index aa11a38..877195c 100644
--- a/src/render/software/CanvasPixel.cpp
+++ b/src/render/software/CanvasPixel.cpp
@@ -23,6 +23,7 @@ const CanvasFragment *CanvasPixel::getFrontFragment() const
 void CanvasPixel::reset()
 {
     count = 0;
+    composite = COLOR_BLACK;
 }
 
 void CanvasPixel::pushFragment(const CanvasFragment &fragment)
diff --git a/src/render/software/CanvasPixel.h b/src/render/software/CanvasPixel.h
index 314e5b0..d2965d7 100644
--- a/src/render/software/CanvasPixel.h
+++ b/src/render/software/CanvasPixel.h
@@ -5,7 +5,7 @@
 
 #include "CanvasFragment.h"
 
-const int MAX_FRAGMENT_COUNT = 7;
+const int MAX_FRAGMENT_COUNT = 2;
 
 namespace paysages {
 namespace software {
diff --git a/src/render/software/CanvasPortion.cpp b/src/render/software/CanvasPortion.cpp
index 805cb02..dbf2950 100644
--- a/src/render/software/CanvasPortion.cpp
+++ b/src/render/software/CanvasPortion.cpp
@@ -69,7 +69,6 @@ void CanvasPortion::preparePixels()
         delete[] pixels;
     }
     pixels = new CanvasPixel[width * height];
-    clear();
 }
 
 void CanvasPortion::discardPixels(bool save)