diff --git a/world/Cargo.toml b/world/Cargo.toml
index 8f2160c186..c96c114004 100644
--- a/world/Cargo.toml
+++ b/world/Cargo.toml
@@ -60,3 +60,7 @@ name = "tree"
 [[example]]
 name = "chunk_compression_benchmarks"
 required-features = ["bin_compression"]
+
+[[example]]
+name = "heightmap_visualization"
+required-features = ["bin_compression"]
diff --git a/world/examples/heightmap_visualization.rs b/world/examples/heightmap_visualization.rs
index e821fdb13b..96ec9e3fcf 100644
--- a/world/examples/heightmap_visualization.rs
+++ b/world/examples/heightmap_visualization.rs
@@ -128,6 +128,13 @@ fn main() {
     image_with_autorange("heightmap.png", 1024, 1024, rgb_from_scalar, |x, y| {
         land.get_alt_approx(Vec2::new(x as i32 * 32, y as i32 * 32))
     });
+    image_with_autorange(
+        "heightmap_big.png",
+        1024 * 4,
+        1024 * 4,
+        rgb_from_scalar,
+        |x, y| land.get_alt_approx(Vec2::new(x as i32 * 8, y as i32 * 8)),
+    );
     image_with_autorange("heightmap_dx.png", 1024, 1024, grey_from_scalar, |x, y| {
         let mut v = 0.0;
         for i in -1i32..=1 {
@@ -175,35 +182,58 @@ fn main() {
             (dx * dx + dy * dy).sqrt()
         },
     );
-    for i in 1..=100 {
-        #[rustfmt::skip]
-        // convert -delay 10 -loop 0 -dispose previous heightmap_delta_{001..100}.png heightmap_thresholds.gif
-        // convert -delay 20 -loop 0 -dispose previous $(seq 1 3 100 | xargs printf "heightmap_delta_%03d.png ") heightmap_thresholds.gif
-        image_with_autorange(
-            &format!("heightmap_delta_{:03}.png", i),
-            1024,
-            1024,
-            grey_from_scalar_thresh(i as f32 * 0.01),
-            |x, y| {
-                let mut v = 0.0;
-                for i in -1i32..=1 {
-                    for j in -1i32..=1 {
-                        let tmp = if i == 0 && j == 0 {
-                            1.0
-                        } else if (i + j).abs() == 1 {
-                            -0.25
-                        } else {
-                            0.0
-                        };
-                        v += tmp as f32
-                            * land.get_alt_approx(Vec2::new(
+    if false {
+        for i in 1..=100 {
+            #[rustfmt::skip]
+            // convert -delay 10 -loop 0 -dispose previous heightmap_delta_{001..100}.png heightmap_thresholds.gif
+            // convert -delay 20 -loop 0 -dispose previous $(seq 1 3 100 | xargs printf "heightmap_delta_%03d.png ") heightmap_thresholds.gif
+            image_with_autorange(
+                &format!("heightmap_delta_{:03}.png", i),
+                1024,
+                1024,
+                grey_from_scalar_thresh(i as f32 * 0.01),
+                |x, y| {
+                    let mut v = 0.0;
+                    for i in -1i32..=1 {
+                        for j in -1i32..=1 {
+                            let tmp = if i == 0 && j == 0 {
+                                1.0
+                            } else if (i + j).abs() == 1 {
+                                -0.25
+                            } else {
+                                0.0
+                            };
+                            v += tmp as f32
+                                * land.get_alt_approx(Vec2::new(
+                                    (x as i32 + i) * 32,
+                                    (y as i32 + j) * 32,
+                                ));
+                        }
+                    }
+                    v
+                },
+            );
+        }
+    }
+    image_with_autorange(
+        "heightmap_max5.png",
+        1024,
+        1024,
+        grey_from_scalar_thresh(0.95),
+        |x, y| {
+            let mut v = -f32::INFINITY;
+            for i in -2i32..=2 {
+                for j in -2i32..=2 {
+                    if i != 0 || j != 0 {
+                        v =
+                            v.max(land.get_alt_approx(Vec2::new(
                                 (x as i32 + i) * 32,
                                 (y as i32 + j) * 32,
-                            ));
+                            )));
                     }
                 }
-                v
-            },
-        );
-    }
+            }
+            land.get_alt_approx(Vec2::new(x as i32 * 32, y as i32 * 32)) / v
+        },
+    );
 }