diff --git a/src/graphics_worker.rs b/src/graphics_worker.rs
index ca284a7..fdb1d74 100644
--- a/src/graphics_worker.rs
+++ b/src/graphics_worker.rs
@@ -28,7 +28,7 @@ pub fn new<'a>(
 	crate::compat_worker::INWorker::new(move |ins:Instruction|{
 		match ins{
 			Instruction::GenerateModels(indexed_model_instances)=>{
-				graphics.generate_models(&device,&queue,indexed_model_instances);
+				graphics.generate_models(&device,&queue,&indexed_model_instances);
 			},
 			Instruction::ClearModels=>{
 				graphics.clear();
diff --git a/src/physics.rs b/src/physics.rs
index cedd694..c876ef4 100644
--- a/src/physics.rs
+++ b/src/physics.rs
@@ -943,11 +943,11 @@ impl PhysicsContext{
 		});
 	}
 
-	pub fn generate_models(&mut self,map:map::Map){
+	pub fn generate_models(&mut self,map:&map::Map){
 		let mut starts=Vec::new();
 		let mut spawns=Vec::new();
 		let mut attr_hash=HashMap::new();
-		for (model_id,model) in map.models{
+		for (&model_id,model) in &map.models{
 			let mesh_id=self.data.models.meshes.len();
 			let mut make_mesh=false;
 			for model_instance in &model.instances{