diff --git a/experiments/2025-03-18/src/export.rs b/experiments/2025-03-18/src/export.rs
index 04fa23aa2..fb63d2f34 100644
--- a/experiments/2025-03-18/src/export.rs
+++ b/experiments/2025-03-18/src/export.rs
@@ -1,10 +1,8 @@
 use std::{collections::BTreeMap, fs::File};
 
-use crate::object::Object;
-
-pub fn export(op: &dyn Object) -> anyhow::Result<()> {
-    let tri_mesh = op.tri_mesh();
+use crate::geometry::TriMesh;
 
+pub fn export(tri_mesh: &TriMesh) -> anyhow::Result<()> {
     let mut indices_by_vertex = BTreeMap::new();
 
     let mut points = Vec::new();
diff --git a/experiments/2025-03-18/src/main.rs b/experiments/2025-03-18/src/main.rs
index cb74be75b..e90b7d8b2 100644
--- a/experiments/2025-03-18/src/main.rs
+++ b/experiments/2025-03-18/src/main.rs
@@ -16,7 +16,7 @@ mod topology;
 fn main() -> anyhow::Result<()> {
     let model = model::model();
 
-    export::export(&model)?;
+    export::export(&model.tri_mesh())?;
     app::run(model.tri_mesh())?;
 
     Ok(())