diff --git a/src/core/render/material_manager.rs b/src/core/render/material_manager.rs
index e522ebf..008ad07 100644
--- a/src/core/render/material_manager.rs
+++ b/src/core/render/material_manager.rs
@@ -119,7 +119,6 @@ impl MaterialManager {
         };
 
         let type_id = TypeId::of::<M>();
-        let material = Arc::new(RwLock::new(M::default()));
 
         let mut materials_id = self.materials_id.write().unwrap();
         let mut materials_pipeline_id = self.materials_pipeline_id.write().unwrap();
@@ -130,10 +129,10 @@ impl MaterialManager {
 
         materials_id.push(type_id);
         materials_pipeline_id.push(pipeline_id);
-        materials_pipeline.push(pipeline.clone());
-        materials_pipeline_state.push(pipeline_state.clone());
+        materials_pipeline.push(pipeline);
+        materials_pipeline_state.push(pipeline_state);
         materials_state.push(Arc::new(RwLock::new(MaterialState::Loading)));
-        materials.push(material.clone());
+        materials.push(Arc::new(RwLock::new(M::default())));
 
         Ok(())
     }