diff --git a/ambientd.c b/ambientd.c
index c350a41..109580d 100644
--- a/ambientd.c
+++ b/ambientd.c
@@ -55,6 +55,13 @@ int read_int(FILE *fp)
 	return r;
 }
 
+float bezier(float t)
+{
+	const float B = 0.66;
+	const float D = 0.28; 
+	return 3*B*t+(3*D-6*B)*t*t+(1+3*B-3*D)*t*t*t;
+}
+
 // TODO: add some command line options like:
 //       -v: verbose/logging
 //       -c file; specify a config file
@@ -123,7 +130,7 @@ int main (void)
 		for (int i = 0; i < MEDIAN_SAMPLES; i++) {
 			luminance += luminance_samples[i] / MEDIAN_SAMPLES;
 		}
-		luminance_percent = MIN(luminance/max_luminance, 1.0);
+		luminance_percent = bezier(MIN(luminance/max_luminance, 1.0));
 
 		brightness_old = brightness_target;
 		brightness_target = MAX((int)(luminance_percent * max_brightness), min_brightness);