diff --git a/main/Scene.cc b/main/Scene.cc
index 0fffb98..13e336f 100644
--- a/main/Scene.cc
+++ b/main/Scene.cc
@@ -232,16 +232,12 @@ Color Scene::computePhong(const refptr<Material> material,
         int jitter_samples = 0, jitter_level = (*it)->getJitter();;
         for (int jitter_index = 0; jitter_index < jitter_level; jitter_index++)
         {
-#if 0
-            double offset = ((double)rand()) / RAND_MAX * M_2_PI;
-#endif
-            double offset = 0.0;
             double jitterRadius = jitter_index * lightRadius
                 / (jitter_level - 0.5);
             for (int i = 0, num = (int) (M_PI * jitter_index) + 1; i < num; i++)
             {
                 jitter_samples++;
-                double jitter_angle = offset + i * M_2_PI / num;
+                double jitter_angle = i * 2.0 * M_PI / num;
                 Vector jitterPosition = lightC
                     + lightPlaneX * jitterRadius * cos(jitter_angle)
                     + lightPlaneY * jitterRadius * sin(jitter_angle);
diff --git a/scenes/subtract-subtract.fart b/scenes/subtract-subtract.fart
index b8ba565..e8304a7 100644
--- a/scenes/subtract-subtract.fart
+++ b/scenes/subtract-subtract.fart
@@ -14,8 +14,8 @@ scene
 
     light
     {
-        position <-1, -3, 4>
-        jitter 3
+        position <-5, -15, 20>
+        jitter 5
     }
 
     plane