diff --git a/src/model_physics.rs b/src/model_physics.rs
index 72f10c8..4bc1284 100644
--- a/src/model_physics.rs
+++ b/src/model_physics.rs
@@ -452,13 +452,11 @@ impl MeshQuery<SubmeshFaceId,SubmeshDirectedEdgeId,SubmeshVertId> for PhysicsMes
 pub struct PhysicsMeshTransform{
 	pub vertex:integer::Planar64Affine3,
 	pub normal:integer::mat3::Matrix3<Fixed<2,64>>,
-	pub det:Fixed<3,96>,
 }
 impl PhysicsMeshTransform{
 	pub fn new(transform:integer::Planar64Affine3)->Self{
 		Self{
 			normal:transform.matrix3.adjugate().transpose(),
-			det:transform.matrix3.det(),
 			vertex:transform,
 		}
 	}