Broken UI and Loading screens

Runtime/PSXSceneExporter.cs

@@ -41,6 +41,12 @@ namespace SplashEdit.RuntimeCode
         [Tooltip("Cutscene clips to include in this scene's splashpack. Only these will be exported.")]
         public PSXCutsceneClip[] Cutscenes = new PSXCutsceneClip[0];
 
+        [Header("Loading Screen")]
+        [Tooltip("Optional prefab containing a PSXCanvas to use as a loading screen when loading this scene.\n" +
+                 "The canvas may contain a PSXUIProgressBar named 'loading' which will be automatically\n" +
+                 "updated during scene load. If null, no loading screen is shown.")]
+        public GameObject LoadingScreenPrefab;
+
         private PSXObjectExporter[] _exporters;
         private TextureAtlas[] _atlases;