diff --git a/src/file.rs b/src/file.rs
index a6f19ef..27243fc 100644
--- a/src/file.rs
+++ b/src/file.rs
@@ -49,14 +49,25 @@ pub fn load<P:AsRef<std::path::Path>>(path:P)->Result<strafesnet_common::map::Co
 		DataStructure::Roblox(dom)=>{
 			let mut loader=strafesnet_deferred_loader::roblox_legacy();
 
+			let (texture_loader,mesh_loader)=loader.get_inner_mut();
+
 			let map_step1=strafesnet_rbx_loader::convert(
 				&dom,
-				|name|loader.acquire_render_config_id(name)
+				|name|texture_loader.acquire_render_config_id(name),
+				|name|mesh_loader.acquire_mesh_id(name),
+			);
+
+			let meshpart_meshes=mesh_loader.load_meshes().map_err(LoadError::Io)?;
+
+			let map_step2=map_step1.add_meshpart_meshes_and_calculate_attributes(
+				meshpart_meshes.into_iter().map(|(mesh_id,loader_model)|
+					(mesh_id,strafesnet_rbx_loader::data::RobloxMeshBytes::new(loader_model.get()))
+				)
 			);
 
 			let (textures,render_configs)=loader.into_render_configs().map_err(LoadError::Io)?.consume();
 
-			let map=map_step1.add_render_configs_and_textures(
+			let map=map_step2.add_render_configs_and_textures(
 				render_configs.into_iter(),
 				textures.into_iter().map(|(texture_id,texture)|
 					(texture_id,match texture{
@@ -74,9 +85,7 @@ pub fn load<P:AsRef<std::path::Path>>(path:P)->Result<strafesnet_common::map::Co
 
 			let map_step1=strafesnet_bsp_loader::convert(
 				&bsp,
-				//acquire_render_config_id
 				|name|texture_loader.acquire_render_config_id(name),
-				//acquire_mesh_id
 				|name|mesh_loader.acquire_mesh_id(name),
 			);
 
diff --git a/src/model_physics.rs b/src/model_physics.rs
index a14226b..66ef198 100644
--- a/src/model_physics.rs
+++ b/src/model_physics.rs
@@ -284,6 +284,7 @@ impl EdgePool{
 #[derive(Debug)]
 pub enum PhysicsMeshError{
 	ZeroVertices,
+	NoPhysicsGroups,
 }
 impl std::fmt::Display for PhysicsMeshError{
 	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
@@ -404,7 +405,7 @@ impl TryFrom<&model::Mesh> for PhysicsMesh{
 				faces,
 				verts,
 			},
-			complete_mesh:mesh_topologies.pop().unwrap(),
+			complete_mesh:mesh_topologies.pop().ok_or(PhysicsMeshError::NoPhysicsGroups)?,
 			submeshes:mesh_topologies,
 		})
 	}