diff --git a/lib/rbx_loader/src/rbx.rs b/lib/rbx_loader/src/rbx.rs
index 78a988e..7f52261 100644
--- a/lib/rbx_loader/src/rbx.rs
+++ b/lib/rbx_loader/src/rbx.rs
@@ -473,7 +473,7 @@ where
 					object.properties.get("CanCollide"),
 				)
 			{
-				let model_transform=planar64_affine3_from_roblox(cf,size);
+				let mut model_transform=planar64_affine3_from_roblox(cf,size);
 
 				if model_transform.matrix3.det().is_zero(){
 					let mut parent_ref=object.parent();
@@ -701,6 +701,8 @@ where
 						panic!("Mesh has no Mesh or Texture");
 					},
 					Shape::PhysicsData=>{
+						//The union mesh is sized already
+						model_transform=planar64_affine3_from_roblox(cf,&rbx_dom_weak::types::Vector3{x:2.0,y:2.0,z:2.0});
 						if let Some(rbx_dom_weak::types::Variant::BinaryString(data))=object.properties.get("PhysicsData"){
 							let physics_data=data.as_ref();
 							let mesh_id=if let Some(&mesh_id)=mesh_id_from_physics_data.get(physics_data){