diff --git a/editor/src/main.rs b/editor/src/main.rs
index a557dfb..d9e6dbc 100644
--- a/editor/src/main.rs
+++ b/editor/src/main.rs
@@ -4,7 +4,7 @@ use csg::{
     plane::Plane,
 };
 
-fn generate_box_brush(position: Vec3, extent: Vec3) -> Brush {
+fn generate_box_brush(position: Vec3, half_extent: Vec3) -> Brush {
     let normals = vec![
         glam::vec3(1.0, 0.0, 0.0),
         glam::vec3(-1.0, 0.0, 0.0),
@@ -16,7 +16,7 @@ fn generate_box_brush(position: Vec3, extent: Vec3) -> Brush {
 
     let mut brush_planes = vec![];
     for normal in &normals {
-        let point = position + *normal * extent;
+        let point = position + *normal * half_extent;
 
         brush_planes.push(BrushPlane {
             plane: Plane::from_point_normal(point, *normal),