diff --git a/examples/image_slicer.scad b/examples/image_slicer.scad
index d5f6120b..798be4ff 100644
--- a/examples/image_slicer.scad
+++ b/examples/image_slicer.scad
@@ -2,7 +2,6 @@ use <hull_polyline2d.scad>;
 use <contours.scad>;
 
 level_step = 51;
-contour_width = 1.5;
 
 levels = [
 	[255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255],
@@ -107,7 +106,7 @@ levels = [
 	[255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255]
 ];
     
-module image_slicer(levels, level_step, contour_width) {
+module image_slicer(levels, level_step) {
     points = [
         for(y = [0:len(levels) - 1]) [
             for(x = [0:len(levels[0]) - 1]) [x, -y, levels[y][x]]
@@ -127,4 +126,4 @@ module image_slicer(levels, level_step, contour_width) {
     }
 }
 
-image_slicer(levels, level_step, contour_width);
\ No newline at end of file
+image_slicer(levels, level_step);
\ No newline at end of file