text almost works

src/game/level.rs

@@ -60,14 +60,15 @@ pub fn save_level(path: &str, game: &mut TestGame, renderer: &mut VulkanRenderer
         }
     }).collect();
 
-    let objects = game.game_objects.iter().map(|game_object_handle| {
+    let objects = game.game_objects.iter().filter_map(|game_object_handle| {
         let game_object = game_object_handle.get_game_object(renderer).unwrap();
-        ObjectJson {
+        if game_object.pipeline_index != 0 { return None; }
+        Some(ObjectJson {
             mesh_index: Some(game_object_handle.object_index),
             position: game_object.position.into(),
             rotation: game_object.rotation.into(),
             scale: game_object.scale.into()
-        }
+        })
     }).collect();
 
     let player = ObjectJson {