diff --git a/src/shaders/basicShader.frag b/src/shaders/basicShader.frag
index 7252e9d..8777e0c 100644
--- a/src/shaders/basicShader.frag
+++ b/src/shaders/basicShader.frag
@@ -1,9 +1,30 @@
 #version 400 core
+uniform vec3 lDirection;
+
+in vec3 fNormal;
+in vec3 fPosition;
 in vec4 ifColor;
+
 out vec4 fColor;
 
 void
 main()
 {
-  fColor = ifColor;
+    // Get lighting vectors
+    vec3 LightDirection = normalize(vec3(0.0)-fPosition);	// We assume light is at camera position
+    vec3 nfNormal = normalize(fNormal);
+    vec3 nviewDirection = normalize(vec3(0.0)-fPosition);
+
+    // Compute diffuse component
+    float diffuse = max(0.0, dot(nfNormal, LightDirection));
+
+    // Compute specular component
+    vec3 Rl = normalize(-LightDirection+2.0*nfNormal*dot(nfNormal,LightDirection));
+    float specular = 0.0;//0.1*pow(max(0.0, dot(Rl, nviewDirection)), 16);
+
+    // Fragment color (currently static, to be replaced with texture)
+    vec3 color = ifColor.xyz;
+
+    // Compute final color
+    fColor = vec4(color * (diffuse +  specular), 1);
 }
diff --git a/src/shaders/basicShader.vert b/src/shaders/basicShader.vert
index 8edff8e..a0f2a96 100644
--- a/src/shaders/basicShader.vert
+++ b/src/shaders/basicShader.vert
@@ -1,14 +1,24 @@
 #version 400 core
 uniform mat4 mvMatrix;
 uniform mat4 projMatrix;
+uniform mat3 normalMatrix;
+
 uniform vec4 color;
+
 in vec4 vPosition;
+in vec3 vNormal;
+
 out vec4 ifColor;
+out vec3 fPosition;
+out vec3 fNormal;
 
 void
 main()
 {
-  gl_Position = projMatrix * mvMatrix * vPosition;
-  ifColor = color;
+    vec4 vEyeCoord = mvMatrix * vPosition;
+    gl_Position = projMatrix * vEyeCoord;
+    fPosition = vEyeCoord.xyz;
+    fNormal = normalMatrix * vNormal;
+    ifColor = color;
 }
 
diff --git a/src/shaders/skyboxShader.frag b/src/shaders/skyboxShader.frag
index f1b865c..6d1e725 100644
--- a/src/shaders/skyboxShader.frag
+++ b/src/shaders/skyboxShader.frag
@@ -7,5 +7,5 @@ uniform sampler2D skybox;
 void main()
 {
     //fColor = texture(skybox, texCoords);
-    fColor = vec4(1.0, 0, 1.0, 1.0);// * texture(skybox, texCoords);
+	fColor = texture(skybox, texCoords);
 }
diff --git a/src/viewer/simpleViewer.cpp b/src/viewer/simpleViewer.cpp
index f5a1949..7353d97 100644
--- a/src/viewer/simpleViewer.cpp
+++ b/src/viewer/simpleViewer.cpp
@@ -50,6 +50,10 @@ namespace
     int vUVLocation;
 
     GLuint Buffers[NumBuffers];
+
+    int m_lDirectionLocation;
+    int m_vNormalLocation;
+    int m_normalMatrixLoc;
 }
 
 class SkyboxCamera : public qglviewer::Camera
@@ -144,7 +148,7 @@ void Viewer::draw()
 	// Traverse the Scene in order to draw its components
 
 	modelStack.push(modelViewMatrix);
-    //root.accept(*this);
+    root.accept(*this);
     frame++;
 	update();
 }
@@ -258,7 +262,16 @@ void Viewer::initShaders()
 		qDebug() << "Unable to find shader location for " << "mvMatrix";
 
 	if ((m_projMatrixLocation = m_program->uniformLocation("projMatrix")) < 0)
-		qDebug() << "Unable to find shader location for " << "projMatrix";
+        qDebug() << "Unable to find shader location for " << "projMatrix";
+
+    if ((m_lDirectionLocation = m_program->uniformLocation("lDirection")) < 0)
+        qDebug() << "Unable to find m_shader location for" << "lDirection";
+
+    if ((m_normalMatrixLoc = m_program->uniformLocation("normalMatrix")) < 0)
+        qDebug() << "Unable to find m_shader location for" << "normalMatrix";
+
+    if ((m_vNormalLocation = m_program->attributeLocation("vNormal")) < 0)
+        qDebug() << "Unable to find m_shader location for" << "vNormal";
 
 
     /*
@@ -382,16 +395,36 @@ void Viewer::initGeometries()
 
     };
 
+    GLfloat normals[numVerticesCube][3] = {
+        { 0, 0, 1 }, {0, 0, 1}, {0, 0, 1},
+        { 0, 0, 1 }, {0, 0, 1}, {0, 0, 1},
+
+        { 0, 0, -1 }, {0, 0, -1}, {0, 0, -1},
+        { 0, 0, -1 }, {0, 0, -1}, {0, 0, -1},
+
+        { 1, 0, 0 }, {1, 0, 0}, {1, 0, 0},
+        { 1, 0, 0 }, {1, 0, 0}, {1, 0, 0},
+
+        { -1, 0, 0 }, {-1, 0, 0}, {-1, 0, 0},
+        { -1, 0, 0 }, {-1, 0, 0}, {-1, 0, 0},
+
+        { 0, 1, 0 }, {0, 1, 0}, {0, 1, 0},
+        { 0, 1, 0 }, {0, 1, 0}, {0, 1, 0},
+
+        { 0, -1, 0 }, {0, -1, 0}, {0, -1, 0},
+        { 0, -1, 0 }, {0, -1, 0}, {0, -1, 0},
+    };
+
 
     glBindVertexArray(m_VAOs[VAO_Cube]);
     glBindBuffer(GL_ARRAY_BUFFER, m_Buffers[VBO_Cube]);
     glGenBuffers(NumBuffers, Buffers);
     glBindBuffer(GL_ARRAY_BUFFER, Buffers[ArrayBuffer]);
-    glBufferData(GL_ARRAY_BUFFER, sizeof(verticesCube) + sizeof(uvs)/* + sizeof(normals)*/,
+    glBufferData(GL_ARRAY_BUFFER, sizeof(verticesCube) + sizeof(uvs) + sizeof(normals),
                  NULL, GL_STATIC_DRAW);
     glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(verticesCube), verticesCube);
     glBufferSubData(GL_ARRAY_BUFFER, sizeof(verticesCube), sizeof(uvs), uvs);
-    //glBufferSubData(GL_ARRAY_BUFFER, sizeof(vertices)+sizeof(uvs), sizeof(normals), normals);
+    glBufferSubData(GL_ARRAY_BUFFER, sizeof(verticesCube)+sizeof(uvs), sizeof(normals), normals);
 
 //	glBindVertexArray(m_VAOs[VAO_Cube]);
 //	glBindBuffer(GL_ARRAY_BUFFER, m_Buffers[VBO_Cube]);
@@ -403,16 +436,24 @@ void Viewer::initGeometries()
     glVertexAttribPointer(s_vUvLocation, 2, GL_FLOAT,
                           GL_FALSE, 0, BUFFER_OFFSET(sizeof(verticesCube)));
     glEnableVertexAttribArray(s_vUvLocation);
+
+    glVertexAttribPointer(m_vNormalLocation, 3, GL_FLOAT,
+                          GL_FALSE, 0, BUFFER_OFFSET(sizeof(verticesCube) + sizeof(uvs)));
+    glEnableVertexAttribArray(m_vNormalLocation);
 }
 
 void Viewer::visit(Cube &s)
 {
 	QMatrix4x4 modelViewMatrix = modelStack.top() * QMatrix4x4(s.transform);
+    QMatrix4x4 lookAt;
+
+    camera()->getProjectionMatrix(lookAt);
 
 	int faces = floor(numVerticesCube/6);
 	for(int i = 0; i < faces; i++){ // 6 vertexes par face
-		glBindVertexArray(m_VAOs[VAO_Cube]);
-		m_program->setUniformValue(m_mvMatrixLocation, modelViewMatrix);
+        glBindVertexArray(m_VAOs[VAO_Cube]);
+        m_program->setUniformValue(m_mvMatrixLocation, modelViewMatrix);
+        m_program->setUniformValue(m_normalMatrixLoc, lookAt.normalMatrix());
 		m_program->setUniformValue(m_colorLocation, s.getColor());
 
 		glDrawArrays(GL_TRIANGLES, i*6, 6);