diff --git a/bent-funny-zone/src/main.rs b/bent-funny-zone/src/main.rs
index 3660f2c..1498eb0 100644
--- a/bent-funny-zone/src/main.rs
+++ b/bent-funny-zone/src/main.rs
@@ -5,12 +5,15 @@ use bmp::{open, Pixel};
 use dasp_sample::{FromSample, Sample, ToSample, U24};
 
 fn main() -> Result<()> {
-    dbg!((45 << 16) + (18 << 8) + 143);
     let mut bmp = open("bmp/sample.bmp")?;
     for y in 0..bmp.get_height() {
         for x in 0..bmp.get_width() {
             if x > 100 && x < 300 {
-                bmp.set_pixel(x, y, Pixel::new(0, 0, 0));
+                bmp.set_pixel(
+                    x,
+                    y,
+                    sample_to_rgb(rgb_to_sample::<f64>(bmp.get_pixel(x, y))),
+                );
             }
         }
     }
@@ -19,15 +22,14 @@ fn main() -> Result<()> {
 }
 
 fn rgb_to_sample<T: Sample + FromSample<U24>>(pix: Pixel) -> T {
-    U24::new(((pix.r as i32) << 16) + ((pix.g as i32) << 8) + (pix.b as i32))
-        .unwrap()
+    (((U24::from(pix.r)) << 16.into()) | (U24::from(pix.g) << 8.into()) | U24::from(pix.b))
         .to_sample()
 }
 
 fn sample_to_rgb<T: Sample + ToSample<U24>>(sample: T) -> Pixel {
     let rgb: U24 = sample.to_sample();
-    let rg = rgb >> 8.try_into().unwrap();
-    let r = rg >> 8.try_into().unwrap();
+    let rg = rgb >> 8.into();
+    let r = rg >> 8.into();
     Pixel::new(
         r.inner() as u8,
         (rg - r).inner() as u8,
@@ -38,12 +40,30 @@ fn sample_to_rgb<T: Sample + ToSample<U24>>(sample: T) -> Pixel {
 #[cfg(test)]
 mod tests {
     use bmp::Pixel;
+    use dasp_sample::{I24, I48, U24, U48};
 
     use super::{rgb_to_sample, sample_to_rgb};
 
     #[test]
-    fn rgb2s2rgb() {
+    fn rgb2s2rgb_type_consistency() {
         let pix = Pixel::new(45, 18, 143);
-        assert_eq!(pix, sample_to_rgb(rgb_to_sample::<f64>(pix)));
+        assert_eq!(
+            sample_to_rgb(rgb_to_sample::<f32>(pix)),
+            sample_to_rgb(rgb_to_sample::<f64>(pix))
+        );
+        assert_eq!(
+            sample_to_rgb(rgb_to_sample::<I24>(pix)),
+            sample_to_rgb(rgb_to_sample::<I48>(pix))
+        );
+        assert_eq!(
+            sample_to_rgb(rgb_to_sample::<U24>(pix)),
+            sample_to_rgb(rgb_to_sample::<U48>(pix))
+        );
+    }
+
+    #[test]
+    fn rgb2s2rgb() {
+        let pix = dbg!(Pixel::new(45, 18, 143));
+        assert_eq!(pix, dbg!(sample_to_rgb(dbg!(rgb_to_sample::<f64>(pix)))));
     }
 }