diff --git a/24-cubemaps/config.json b/24-cubemaps/config.json
index 548f055..5fa8ece 100644
--- a/24-cubemaps/config.json
+++ b/24-cubemaps/config.json
@@ -54,16 +54,12 @@
       "window": {
         "directory": "assets",
         "model_path": "window.glb"
-      },
-      "backpack": {
-        "directory": "assets/backpack",
-        "model_path": "backpack.obj"
       }
     },
     "things": [
-      {"model": "backpack", "position": [1.5,  0.0, -1.0],
+      {"model": "marble_cube", "position": [1.5,  0.0, -1.0],
         "rotation": {"angle": 0.0, "axes": [1.0, 1.0, 1.0]},
-        "scale": 1.0,
+        "scale": 3.0,
         "material": "default"},
       {"model": "marble_cube", "position": [1.5,  0.25,  0.0],
         "rotation": {"angle": 90.0, "axes": [1.0,0.0,0.0]},