private void OnGUI()
        {
            using (var scope = new GUILayout.ScrollViewScope(scroll))
            {
                scroll = scope.scrollPosition;

                GUILayout.Space(10);
                HeaderGUI( );
                GUILayout.Space(10);
                if (!FolderGUI( ))
                {
                    return;
                }
                GUILayout.Space(5);
                TextureGUI( );
                GUILayout.Space(5);
                if (!PrefabBakerGUI( ))
                {
                    return;
                }
                GUILayout.Space(5);
                EditorUtils.BoxGUI(() => {
                    BakeSettingsGUI( );

                    GUILayout.Space(5);

                    var h = GUILayout.Height(30);

                    if (GUILayout.Button("Bake", h))
                    {
                        Baker.Start( );
                    }
                });

                GUILayout.Space(5);
                SceneLightmapsGUI( );
            }
        }