diff --git a/experiments/2024-10-30/src/export.rs b/experiments/2024-10-30/src/export.rs
index 351b216dc..10c0bab9b 100644
--- a/experiments/2024-10-30/src/export.rs
+++ b/experiments/2024-10-30/src/export.rs
@@ -7,7 +7,7 @@ pub fn export(mesh: &Mesh) -> anyhow::Result<()> {
         .vertices()
         .iter()
         .copied()
-        .map(|vertex| vertex.map(Into::into))
+        .map(|vertex| vertex.point.map(Into::into))
         .map(|[x, y, z]| threemf::model::Vertex { x, y, z })
         .collect();
 
diff --git a/experiments/2024-10-30/src/geometry.rs b/experiments/2024-10-30/src/geometry.rs
index ca17af617..a9d8467ef 100644
--- a/experiments/2024-10-30/src/geometry.rs
+++ b/experiments/2024-10-30/src/geometry.rs
@@ -22,6 +22,10 @@ impl Mesh {
     }
 }
 
-pub type Vertex = [f32; 3];
+#[derive(Clone, Copy)]
+pub struct Vertex {
+    pub point: [f32; 3],
+}
+
 pub type Index = u32;
 pub type Triangle = [Index; 3];
diff --git a/experiments/2024-10-30/src/model.rs b/experiments/2024-10-30/src/model.rs
index d917580c5..b4a42feba 100644
--- a/experiments/2024-10-30/src/model.rs
+++ b/experiments/2024-10-30/src/model.rs
@@ -1,4 +1,4 @@
-use crate::geometry::Mesh;
+use crate::geometry::{Mesh, Vertex};
 
 pub fn model() -> anyhow::Result<Mesh> {
     let mut mesh = Mesh::default();
@@ -13,7 +13,7 @@ pub fn model() -> anyhow::Result<Mesh> {
         [-0.5, 0.5, 0.5],   // 6
         [0.5, 0.5, 0.5],    // 7
     ]
-    .map(|vertex| mesh.push_vertex(vertex));
+    .map(|vertex| mesh.push_vertex(Vertex { point: vertex }));
 
     [
         [0, 4, 6], // left
diff --git a/experiments/2024-10-30/src/render.rs b/experiments/2024-10-30/src/render.rs
index e30f1fb2a..dc74a0916 100644
--- a/experiments/2024-10-30/src/render.rs
+++ b/experiments/2024-10-30/src/render.rs
@@ -193,7 +193,7 @@ impl Renderer {
 
         for triangle in mesh.triangles() {
             let triangle = triangle
-                .map(|index| Vec3::from(mesh.vertices()[index as usize]));
+                .map(|index| Vec3::from(mesh.vertices()[index as usize].point));
             let normal = {
                 let [a, b, c] = triangle;