diff --git a/material.cpp b/material.cpp
index f9ee044..8e8edce 100644
--- a/material.cpp
+++ b/material.cpp
@@ -11,7 +11,7 @@ bool Lambertian::scatter(const Ray& r_in, const hit_record& rec, Color& attenuat
 
 bool Metal::scatter(const Ray& r_in, const hit_record& rec, Color& attenuation, Ray& scattered) const {
   Vec3 reflected = reflect(unit_vector(r_in.direction()), rec.normal);
-  scattered = Ray(rec.p, reflected);
+  scattered = Ray(rec.p, reflected + fuzz * random_in_unit_sphere());
   attenuation = albedo;
   return (dot(scattered.direction(), rec.normal) > 0);
 }
diff --git a/material.h b/material.h
index 109c12e..5b7c2d4 100644
--- a/material.h
+++ b/material.h
@@ -23,11 +23,12 @@ private:
 
 class Metal : public Material {
 public:
-  Metal(const Color& a) : albedo(a) {}
+  Metal(const Color& a, double f) : albedo(a), fuzz(f < 1 ? f : 1) {}
 
   virtual bool scatter(const Ray& r_in, const hit_record& rec, Color& attenuation, Ray& scattered) const;
 private:
   Color albedo;
+  double fuzz;
 };
 
 #endif // MATERIAL_H
diff --git a/wtracer.cpp b/wtracer.cpp
index 47c72ba..dadeca2 100644
--- a/wtracer.cpp
+++ b/wtracer.cpp
@@ -45,10 +45,10 @@ int main() {
     world.add(std::make_shared<Sphere>(Point3(0, -100.5, -1), 100));*/
 
     world.add(std::make_shared<Sphere>(Point3(0, 0, -1), 0.5, std::make_shared<Lambertian>(Color(0.7, 0.3, 0.3))));
-    world.add(std::make_shared<Sphere>(Point3(0, -100.5, -1), 100, std::make_shared<Lambertian>(Color(0.8, 0.8, 0.8))));
+    world.add(std::make_shared<Sphere>(Point3(0, -100.5, -1), 100, std::make_shared<Lambertian>(Color(0.8, 0.8, 0.0))));
 
-    world.add(std::make_shared<Sphere>(Point3(1, 0, -1), 0.5, std::make_shared<Metal>(Color(0.8, 0.6, 0.2))));
-    world.add(std::make_shared<Sphere>(Point3(-1, 0, -1), 0.5, std::make_shared<Metal>(Color(0.8, 0.8, 0.8))));
+    world.add(std::make_shared<Sphere>(Point3(1, 0, -1), 0.5, std::make_shared<Metal>(Color(0.8, 0.6, 0.2), 0.3)));
+    world.add(std::make_shared<Sphere>(Point3(-1, 0, -1), 0.5, std::make_shared<Metal>(Color(0.8, 0.8, 0.8), 1.0)));
 
     Camera cam;