diff --git a/Makefile b/Makefile
index 029e344..3f71a98 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 CXX = g++
 TARGET = ray
-OBJECTS = main.o disk.o plane.o sphere.o directional_light.o point_light.o tracer.o path_tracer.o whitted_tracer.o phong_brdf.o
+OBJECTS = main.o disk.o plane.o sphere.o directional_light.o phong_brdf.o point_light.o tracer.o path_tracer.o whitted_tracer.o
 DEPENDS = $(OBJECTS:.o=.d)
 CXXFLAGS = -ansi -pedantic -Wall -DGLM_FORCE_RADIANS -fopenmp
 LDLIBS = -lfreeimage
diff --git a/brdf.hpp b/brdf.hpp
index 14a54c5..e320fd0 100644
--- a/brdf.hpp
+++ b/brdf.hpp
@@ -5,7 +5,6 @@
 #include <glm/vec3.hpp>
 
 #include "ray.hpp"
-#include "material.hpp"
 
 using glm::vec3;
 
diff --git a/directional_light.cpp b/directional_light.cpp
index d069014..26ceb41 100644
--- a/directional_light.cpp
+++ b/directional_light.cpp
@@ -21,9 +21,9 @@ inline float DirectionalLight::distance(vec3 point) {
 }
 
 vec3 DirectionalLight::diffuse(vec3 normal, Ray & r, vec3 i_pos, Material & m) const {
-  return m_brdf->diffuse(m_position, normal, r, m_diffuse);
+  return m.m_brdf->diffuse(m_position, normal, r, m_diffuse);
 }
 
 vec3 DirectionalLight::specular(vec3 normal, Ray & r, vec3 i_pos, Material & m) const {
-  return m_brdf->specular(m_position, normal, r, m_specular, m.m_shininess);
+  return m.m_brdf->specular(m_position, normal, r, m_specular, m.m_shininess);
 }
diff --git a/directional_light.hpp b/directional_light.hpp
index b008adf..040d756 100644
--- a/directional_light.hpp
+++ b/directional_light.hpp
@@ -8,7 +8,7 @@ class DirectionalLight: public Light {
 public:
   DirectionalLight(): Light() { }
 
-  DirectionalLight(BRDF * _brdf, vec3 _p, vec3 _d, vec3 _s): Light(_brdf, _p, _d, _s) { }
+  DirectionalLight(vec3 _p, vec3 _d, vec3 _s): Light(_p, _d, _s) { }
 
   virtual vec3 direction(vec3 point);
   virtual float distance(vec3 point);
diff --git a/light.hpp b/light.hpp
index 09866a9..16c42a3 100644
--- a/light.hpp
+++ b/light.hpp
@@ -4,27 +4,22 @@
 
 #include <glm/vec3.hpp>
 
-#include "brdf.hpp"
-#include "phong_brdf.hpp"
-#include "ray.hpp"
 #include "material.hpp"
+#include "ray.hpp"
 
 using glm::vec3;
 
 class Light {
 public:
-  BRDF * m_brdf;
   vec3 m_position;
   vec3 m_diffuse;
   vec3 m_specular;
 
-  Light(): m_brdf(static_cast<BRDF *>(new PhongBRDF())), m_position(vec3(0.0f)), m_diffuse(vec3(1.0f)), m_specular(vec3(1.0f)) { }
+  Light(): m_position(vec3(0.0f)), m_diffuse(vec3(1.0f)), m_specular(vec3(1.0f)) { }
 
-  Light(BRDF * _brdf, vec3 _p, vec3 _d, vec3 _s): m_brdf(_brdf), m_position(_p), m_diffuse(_d), m_specular(_s) { }
+  Light(vec3 _p, vec3 _d, vec3 _s): m_position(_p), m_diffuse(_d), m_specular(_s) { }
   
-  virtual ~Light() {
-    delete m_brdf;
-  }
+  virtual ~Light() { }
 
   virtual vec3 direction(vec3 point) = 0;
   virtual float distance(vec3 point) = 0;
diff --git a/main.cpp b/main.cpp
index 2d13611..e6733bd 100644
--- a/main.cpp
+++ b/main.cpp
@@ -88,6 +88,7 @@ int main(int argc, char ** argv) {
   
   scene_2(figures, lights, i_model_view);
 
+  // Create the tracer object.
   if (g_tracer == WHITTED)
     tracer = static_cast<Tracer *>(new WhittedTracer(g_h, g_w, g_fov, g_max_depth));
   else if(g_tracer == MONTE_CARLO)
diff --git a/material.hpp b/material.hpp
index 78f4f98..c53c523 100644
--- a/material.hpp
+++ b/material.hpp
@@ -4,6 +4,9 @@
 
 #include <glm/vec3.hpp>
 
+#include "brdf.hpp"
+#include "phong_brdf.hpp"
+
 using glm::vec3;
 
 class Material {
@@ -14,10 +17,11 @@ public:
   float m_shininess;
   float m_ref_index;
   bool m_refract;
-  float kd;
-  float ks;
+  BRDF * m_brdf;
 
-  Material(): m_diffuse(vec3(1.0f)), m_specular(vec3(1.0f)), m_rho(0.0f), m_shininess(89.0f), m_ref_index(1.0f), m_refract(false), kd(0.4f), ks(0.4f) { }
+  Material(BRDF * _brdf = NULL): m_diffuse(vec3(1.0f)), m_specular(vec3(1.0f)), m_rho(0.0f), m_shininess(89.0f), m_ref_index(1.0f), m_refract(false) {
+    m_brdf = _brdf != NULL ? _brdf : static_cast<BRDF *>(new PhongBRDF());
+  }
 
   Material(const Material & m) {
     m_diffuse = m.m_diffuse;
@@ -26,6 +30,7 @@ public:
     m_shininess = m.m_shininess;
     m_ref_index = m.m_ref_index;
     m_refract = m.m_refract;
+    m_brdf = m.m_brdf;
   }
 };
 
diff --git a/output.png b/output.png
index 96b8073..11c9573 100644
Binary files a/output.png and b/output.png differ
diff --git a/path_tracer.cpp b/path_tracer.cpp
index baccbd7..688bdf8 100644
--- a/path_tracer.cpp
+++ b/path_tracer.cpp
@@ -88,7 +88,7 @@ vec3 PathTracer::trace_ray(Ray & r, vector<Figure *> & v_figures, vector<Light *
 	amb_color = vis ? BCKG_COLOR * max(dot(n, rr.m_direction), 0.0f) / PDF : vec3(0.0f);
       }
       
-      color += ((dir_diff_color + ind_color + amb_color) * (_f->m_mat.m_diffuse / pi<float>())) + (_f->m_mat.m_diffuse * dir_spec_color);
+      color += ((dir_diff_color + ind_color + amb_color) * (_f->m_mat.m_diffuse / pi<float>())) + (_f->m_mat.m_specular * dir_spec_color);
 
       // Determine the specular reflection color.
       if (_f->m_mat.m_rho > 0.0f && rec_level < m_max_depth) {
diff --git a/phong_brdf.hpp b/phong_brdf.hpp
index fc8cbe9..8e0d833 100644
--- a/phong_brdf.hpp
+++ b/phong_brdf.hpp
@@ -4,7 +4,7 @@
 
 #include "brdf.hpp"
 
-class PhongBRDF: public BRDF{
+class PhongBRDF: public BRDF {
 public:
   PhongBRDF() { }
   virtual ~PhongBRDF() { }
diff --git a/point_light.cpp b/point_light.cpp
index 5d07554..aabe96e 100644
--- a/point_light.cpp
+++ b/point_light.cpp
@@ -28,7 +28,7 @@ vec3 PointLight::diffuse(vec3 normal, Ray & r, vec3 i_pos, Material & m) const {
   l_dir = normalize(l_dir);
   att = 1.0f / (m_const_att + (m_lin_att * d) + (m_quad_att * (d * d)));
 
-  return att * m_brdf->diffuse(l_dir, normal, r, m_diffuse);
+  return att * m.m_brdf->diffuse(l_dir, normal, r, m_diffuse);
 }
 
 vec3 PointLight::specular(vec3 normal, Ray & r, vec3 i_pos, Material & m) const {
@@ -40,5 +40,5 @@ vec3 PointLight::specular(vec3 normal, Ray & r, vec3 i_pos, Material & m) const
   l_dir = normalize(l_dir);
   att = 1.0f / (m_const_att + (m_lin_att * d) + (m_quad_att * (d * d)));
 
-  return att * m_brdf->specular(l_dir, normal, r, m_specular, m.m_shininess);
+  return att * m.m_brdf->specular(l_dir, normal, r, m_specular, m.m_shininess);
 }
diff --git a/point_light.hpp b/point_light.hpp
index 93de77a..3685a5c 100644
--- a/point_light.hpp
+++ b/point_light.hpp
@@ -12,7 +12,7 @@ public:
 
   PointLight(): Light(), m_const_att(1.0f), m_lin_att(0.0f), m_quad_att(0.0f) { }
 
-  PointLight(BRDF * _brdf, vec3 _p, vec3 _d, vec3 _s, float _c, float _l, float _q): Light(_brdf, _p, _d, _s), m_const_att(_c), m_lin_att(_l), m_quad_att(_q) { }
+  PointLight(vec3 _p, vec3 _d, vec3 _s, float _c, float _l, float _q): Light(_p, _d, _s), m_const_att(_c), m_lin_att(_l), m_quad_att(_q) { }
 
   virtual vec3 direction(vec3 point);
   virtual float distance(vec3 point);
diff --git a/whitted_tracer.cpp b/whitted_tracer.cpp
index 0e6f81c..bae60bf 100644
--- a/whitted_tracer.cpp
+++ b/whitted_tracer.cpp
@@ -55,7 +55,7 @@ vec3 WhittedTracer::trace_ray(Ray & r, vector<Figure *> & v_figures, vector<Ligh
 	dir_spec_color += vis ? v_lights[l]->specular(n, r, i_pos, _f->m_mat) : vec3(0.0f);
       }
       
-      color += (dir_diff_color * (_f->m_mat.m_diffuse / pi<float>())) + (_f->m_mat.m_diffuse * dir_spec_color);
+      color += (dir_diff_color * (_f->m_mat.m_diffuse / pi<float>())) + (_f->m_mat.m_specular * dir_spec_color);
 
       // Determine the specular reflection color.
       if (_f->m_mat.m_rho > 0.0f && rec_level < m_max_depth) {