diff --git a/rtchallenge/src/camera.rs b/rtchallenge/src/camera.rs
index 9936814..464e597 100644
--- a/rtchallenge/src/camera.rs
+++ b/rtchallenge/src/camera.rs
@@ -147,8 +147,8 @@ impl Camera {
     /// ```
     pub fn render(&self, w: &World) -> Canvas {
         let mut image = Canvas::new(self.hsize, self.vsize, BLACK);
-        for y in 0..self.hsize {
-            for x in 0..self.vsize {
+        for y in 0..self.vsize {
+            for x in 0..self.hsize {
                 let ray = self.ray_for_pixel(x, y);
                 let color = w.color_at(&ray);
                 image.set(x, y, color);