diff --git a/chromakey/alpha.png b/chromakey/alpha.png
index 7408e26..3c2bf66 100644
Binary files a/chromakey/alpha.png and b/chromakey/alpha.png differ
diff --git a/chromakey/bluescreen.m b/chromakey/bluescreen.m
index f50c82d..d0827c1 100644
--- a/chromakey/bluescreen.m
+++ b/chromakey/bluescreen.m
@@ -28,7 +28,7 @@ im = im2double(imread(img_name));
 im_rgb = imresize(im, 1);
 se = strel('square',3)
 
-ref_rgb = toRef([0 0.5 1], size(im_rgb));
+ref_rgb = toRef([0.0 0.5 0.95], size(im_rgb));
 
 close all;
 
@@ -36,11 +36,11 @@ figure;
 imshow(ref_rgb);
 
 figure;
-despilled_rgb_matte = im_rgb - k_sb*ref_rgb;
+despilled_rgb_matte = max(0, im_rgb - k_sb*ref_rgb);
 imshow(despilled_rgb_matte);
 
 figure;
-despilled_rgb = im_rgb - k_ds*ref_rgb;
+despilled_rgb = max(0, im_rgb - k_ds*ref_rgb);
 imshow(despilled_rgb);
 
 figure;
@@ -55,6 +55,10 @@ figure;
 edges = coloredges(despilled_rgb_matte, ref_rgb);
 imshow(edges);
 
+figure;
+final = max(0, despilled_rgb.*matte - edges.*ref_rgb);
+imshow(final);
+
 imwrite(final, 'final.png','png','alpha', matte);
 imwrite(matte, 'alpha.png','png');
 
diff --git a/chromakey/final.png b/chromakey/final.png
index 8b1cc89..1aab552 100644
Binary files a/chromakey/final.png and b/chromakey/final.png differ