diff --git a/src/perlin.rs b/src/perlin.rs
index 3dfb3c9..f573a32 100644
--- a/src/perlin.rs
+++ b/src/perlin.rs
@@ -26,16 +26,12 @@ impl Perlin {
     }
 
     pub fn noise(&self, point: &Point3) -> f64 {
-        /*
-        let i = ((4.0 * point.x()) as i32) & 255;
-        let j = ((4.0 * point.y()) as i32) & 255;
-        let k= ((4.0 * point.z()) as i32) & 255;
-        let idx = self.perm_x[i as usize] ^ self.perm_y[j as usize] ^ self.perm_z[k as usize];
-        self.ranfloat[idx]
-        */
         let u = point.x() - point.x().floor();
         let v = point.y() - point.y().floor();
         let w = point.z() - point.z().floor();
+        let u = u * u * (3.0 - 2.0 * u);
+        let v = v * v * (3.0 - 2.0 * v);
+        let w = w * w * (3.0 - 2.0 * w);
         let i = point.x().floor() as i32;
         let j = point.y().floor() as i32;
         let k = point.z().floor() as i32;