diff --git a/.gitignore b/.gitignore
index b81d87c..2ce6cc3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,2 @@
-build/*
+build*
 *.user
\ No newline at end of file
diff --git a/lights.h b/lights.h
index 8d035ef..4c522c5 100644
--- a/lights.h
+++ b/lights.h
@@ -5,7 +5,7 @@
 #include <glew/glew.h>
 #include <vector>
 
-#define MAX_LIGHTS 8
+#define MAX_LIGHTS 4
 
 class Shader;
 
diff --git a/mainwindow.ui b/mainwindow.ui
index c8d03fd..8cb16b2 100644
--- a/mainwindow.ui
+++ b/mainwindow.ui
@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>757</width>
-    <height>492</height>
+    <width>400</width>
+    <height>300</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -40,8 +40,8 @@
     <rect>
      <x>0</x>
      <y>0</y>
-     <width>757</width>
-     <height>21</height>
+     <width>400</width>
+     <height>20</height>
     </rect>
    </property>
   </widget>
diff --git a/myglwidget.cpp b/myglwidget.cpp
index 0baeb6e..c82c5a9 100644
--- a/myglwidget.cpp
+++ b/myglwidget.cpp
@@ -65,7 +65,8 @@ Scene* MyGLWidget::buildScene()
 
 void MyGLWidget::initializeGL()
 {
-    makeCurrent();
+    if(renderer != NULL)
+        delete(renderer);
     renderer = new SparrowRenderer(width(), height());
     Scene* scene = buildScene();
     controller = new FocusController(new glm::vec3(0));
diff --git a/phong.frag b/phong.frag
index af1d944..281702a 100644
--- a/phong.frag
+++ b/phong.frag
@@ -6,9 +6,9 @@ uniform vec3 materialKs;
 uniform float materialNs;
 
 uniform int nbDirLights;
-uniform vec3 dirLights[16];
+uniform vec3 dirLights[8];
 uniform int nbPointLights;
-uniform vec3 pointLights[16];
+uniform vec3 pointLights[8];
 
 // texture
 uniform sampler2D baseTexture;
@@ -17,8 +17,8 @@ uniform sampler2D baseTexture;
 in vec3 varNormal;
 in vec2 varTexCoord;
 
-in vec3 lightDirInView[8];
-in vec3 halfVecInView[8];
+in vec3 lightDirInView[4];
+in vec3 halfVecInView[4];
 
 // resultat
 layout(location = 0)out vec4 outColor;
@@ -41,9 +41,9 @@ void main(void) {
 	int i;
 	vec3 kd = vec3(texture2D(baseTexture, varTexCoord));
 	vec3 light = 0.1f*kd;
-	for(i=0; i<nbDirLights && i<8; ++i)
+        for(i=0; i<nbDirLights && i<4; ++i)
 		light += computeLight(kd, materialKs, materialNs, dirLights[i*2+1], varNormal, lightDirInView[i], halfVecInView[i]);
-	for(i=0; i<nbPointLights && i+nbDirLights<8; ++i)
+        for(i=0; i<nbPointLights && i+nbDirLights<4; ++i)
 		light += computeLight(kd, materialKs, materialNs, pointLights[i*2+1], varNormal, lightDirInView[nbDirLights+i], halfVecInView[nbDirLights+i]);
 
 	outColor = vec4(light, 1);
diff --git a/phong.vert b/phong.vert
index 253a778..5a1dbb4 100644
--- a/phong.vert
+++ b/phong.vert
@@ -7,16 +7,16 @@ uniform mat4 normalMatrix;
 uniform mat4 viewMatrix;
 
 uniform int nbDirLights;
-uniform vec3 dirLights[16];
+uniform vec3 dirLights[8];
 uniform int nbPointLights;
-uniform vec3 pointLights[16];
+uniform vec3 pointLights[8];
 
 layout(location = 0)in vec3 inPosition;
 layout(location = 1)in vec3 inNormal;
 layout(location = 2)in vec4 inTexCoord;
 
-out vec3 lightDirInView[8];
-out vec3 halfVecInView[8];
+out vec3 lightDirInView[4];
+out vec3 halfVecInView[4];
 
 out vec3 varNormal;
 out vec2 varTexCoord;
@@ -35,9 +35,9 @@ void computePointLightingVectorsInView(in vec3 posInView, in vec3 lightPosition,
 
 void main(void) {
 	int i;
-	for(i=0; i<nbDirLights && i<8; ++i)
+        for(i=0; i<nbDirLights && i<4; ++i)
 		computeDirectionnalLightingVectorsInView(vec3(modelViewMatrix*vec4(inPosition, 1.0)), dirLights[i*2], lightDirInView[i], halfVecInView[i]);
-	for(i=0; i<nbPointLights && i+nbDirLights<8; ++i)
+        for(i=0; i<nbPointLights && i+nbDirLights<4; ++i)
 		computePointLightingVectorsInView(vec3(modelViewMatrix*vec4(inPosition, 1.0)), pointLights[i*2], lightDirInView[nbDirLights+i], halfVecInView[nbDirLights+i]);
 
         // normales corrigees (en fonction de la vue)
diff --git a/sparrowRenderer.pro b/sparrowRenderer.pro
index 7d67d74..a391b04 100644
--- a/sparrowRenderer.pro
+++ b/sparrowRenderer.pro
@@ -4,9 +4,7 @@
 #
 #-------------------------------------------------
 
-QT       += core gui opengl
-
-greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+QT       += core gui opengl widgets
 
 TARGET = sparrowRenderer
 TEMPLATE = app
@@ -15,9 +13,13 @@ CONFIG += c++11
 INCLUDEPATH += ../cpp_dependencies/include
 win32 {
 	LIBS += -L../../cpp_dependencies/lib/win32
+        LIBS += -lglew32
+}
+linux {
+        LIBS += -L../../cpp_dependencies/lib/linux
+        LIBS += -lGLEW -lGLU
 }
 
-LIBS += -lglew32
 
 SOURCES += main.cpp\
 	mainwindow.cpp \
@@ -27,7 +29,7 @@ SOURCES += main.cpp\
     camera.cpp \
     scene.cpp \
     gridmesh.cpp \
-	texture.cpp \
+    texture.cpp \
     phongmaterial.cpp \
     scenecontroller.cpp \
     sphere.cpp \
@@ -48,8 +50,8 @@ HEADERS += mainwindow.h \
     glassert.h \
     scene.h \
     material.h \
-	gridmesh.h \
-	texture.h \
+    gridmesh.h \
+    texture.h \
     phongmaterial.h \
     scenecontroller.h \
     sphere.h \