diff --git a/rainbow.py b/rainbow.py
index db3c510..94ad879 100644
--- a/rainbow.py
+++ b/rainbow.py
@@ -16,9 +16,9 @@ center = [0,0]
 r = 1
 # n = 1.3
 # disk = Disk(center, r, n)
-N = 10000
+N = 100000
 min_intensity = 0.00001
-max_ray = 1000000
+max_ray = 100*N
 
 stack = []
 result = []
@@ -197,7 +197,8 @@ def draw_column(i, w, h, radius, angle_sRGB):
 		for j in range(h):
 			r = np.linalg.norm(np.array([i,j]) - [w/2, 0])
 			index = bin_find(r, radius, index)
-			column[j] = angle_sRGB[index]*255
+			ratio = (r - radius[index])/(radius[index+1] - radius[index])
+			column[j] = ((1-ratio)*angle_sRGB[index]+ratio*angle_sRGB[index+1])*255
 		return i,column
 
 def take_picture(angles, angle_sRGB, w, h, distance, filename="image.png"):