diff --git a/tools/gltf_auto_export/__init__.py b/tools/gltf_auto_export/__init__.py
index 7f544fb..eb3a0c7 100644
--- a/tools/gltf_auto_export/__init__.py
+++ b/tools/gltf_auto_export/__init__.py
@@ -31,7 +31,7 @@ from .auto_export.internals import (SceneLink,
                         CollectionsToExport,
                         CUSTOM_PG_sceneName
                         )
-from .ui.main import (GLTF_PT_auto_export_changes_list, GLTF_PT_auto_export_main,
+from .ui.main import (GLTF_PT_auto_export_change_detection, GLTF_PT_auto_export_changes_list, GLTF_PT_auto_export_main,
                       GLTF_PT_auto_export_root,
                       GLTF_PT_auto_export_general,
                       GLTF_PT_auto_export_scenes,
@@ -42,7 +42,6 @@ from .ui.main import (GLTF_PT_auto_export_changes_list, GLTF_PT_auto_export_main
                       GLTF_PT_auto_export_SidePanel
                       )
 from .ui.operators import (SCENES_LIST_OT_actions)
-from .helpers.ping_depsgraph_update import ping_depsgraph_update
 from .helpers.generate_complete_preferences_dict import generate_complete_preferences_dict_gltf
 
 
@@ -114,6 +113,7 @@ classes = [
     GLTF_PT_auto_export_main,
     GLTF_PT_auto_export_root,
     GLTF_PT_auto_export_general,
+    GLTF_PT_auto_export_change_detection,
     GLTF_PT_auto_export_scenes,
     GLTF_PT_auto_export_blueprints,
     GLTF_PT_auto_export_SidePanel,
@@ -152,18 +152,14 @@ def glTF2_post_export_callback(data):
 
         # get the parameters
         scene = bpy.context.scene
-        print(dict(scene))
         if "glTF2ExportSettings" in scene:
-            print("write gltf settings")
             settings = scene["glTF2ExportSettings"]
             export_settings = bpy.data.texts[".gltf_auto_export_gltf_settings"] if ".gltf_auto_export_gltf_settings" in bpy.data.texts else bpy.data.texts.new(".gltf_auto_export_gltf_settings")
             # now write new settings
             export_settings.clear()
 
             current_gltf_settings = generate_complete_preferences_dict_gltf(dict(settings))
-            print("current_gltf_settings", current_gltf_settings)
             export_settings.write(json.dumps(current_gltf_settings))
-            print("done writing")
         # now reset the original gltf_settings
         if gltf_settings_backup != "":
             scene["glTF2ExportSettings"] = json.loads(gltf_settings_backup)
@@ -176,12 +172,7 @@ def glTF2_post_export_callback(data):
         last_operator = bpy.context.window_manager.auto_export_tracker.last_operator
         last_operator.filepath = ""
         last_operator.gltf_export_id = ""
-
-        # AGAIN, something that does not work withouth a timer
-        bpy.app.timers.register(ping_depsgraph_update, first_interval=0.1)
        
-
-
 def menu_func_import(self, context):
     self.layout.operator(AutoExportGLTF.bl_idname, text="glTF auto Export (.glb/gltf)")
 from bpy.app.handlers import persistent
@@ -190,10 +181,6 @@ from bpy.app.handlers import persistent
 def post_update(scene, depsgraph):
     bpy.context.window_manager.auto_export_tracker.deps_post_update_handler( scene, depsgraph)
 
-@persistent
-def pre_update(scene, depsgraph):
-    bpy.context.window_manager.auto_export_tracker.deps_pre_update_handler( scene, depsgraph)
-
 @persistent
 def post_save(scene, depsgraph):
     bpy.context.window_manager.auto_export_tracker.save_handler( scene, depsgraph)
@@ -202,7 +189,6 @@ def register():
     for cls in classes:
         bpy.utils.register_class(cls)
     # for some reason, adding these directly to the tracker class in register() do not work reliably
-    bpy.app.handlers.depsgraph_update_pre.append(pre_update)
     bpy.app.handlers.depsgraph_update_post.append(post_update)
     bpy.app.handlers.save_post.append(post_save)
 
@@ -210,19 +196,13 @@ def register():
     bpy.types.TOPBAR_MT_file_export.append(menu_func_import)
     bpy.types.WindowManager.gltf_settings_backup = StringProperty(default="")
 
-    """bpy.utils.register_class(AutoExportExtensionProperties)
-    bpy.types.Scene.AutoExportExtensionProperties = bpy.props.PointerProperty(type=AutoExportExtensionProperties)"""
-    
 def unregister():
     for cls in classes:
         bpy.utils.unregister_class(cls)
     bpy.types.TOPBAR_MT_file_export.remove(menu_func_import)
 
-    bpy.app.handlers.depsgraph_update_pre.remove(pre_update)
     bpy.app.handlers.depsgraph_update_post.remove(post_update)
     bpy.app.handlers.save_post.remove(post_save)
 
-    """bpy.utils.unregister_class(AutoExportExtensionProperties)"""
-
 if "gltf_auto_export" == "__main__":
     register()
diff --git a/tools/gltf_auto_export/auto_export/auto_export.py b/tools/gltf_auto_export/auto_export/auto_export.py
index 469fb23..ef56b7e 100644
--- a/tools/gltf_auto_export/auto_export/auto_export.py
+++ b/tools/gltf_auto_export/auto_export/auto_export.py
@@ -19,7 +19,7 @@ from ..modules.export_materials import cleanup_materials, export_materials
 from ..modules.bevy_scene_components import upsert_scene_components
 
 
-"""Main function"""
+"""this is the main 'central' function for all auto export """
 def auto_export(changes_per_scene, changed_export_parameters, addon_prefs):
     # have the export parameters (not auto export, just gltf export) have changed: if yes (for example switch from glb to gltf, compression or not, animations or not etc), we need to re-export everything
     print ("changed_export_parameters", changed_export_parameters)
diff --git a/tools/gltf_auto_export/auto_export/export_gltf.py b/tools/gltf_auto_export/auto_export/export_gltf.py
index 3cd860e..c5a891b 100644
--- a/tools/gltf_auto_export/auto_export/export_gltf.py
+++ b/tools/gltf_auto_export/auto_export/export_gltf.py
@@ -66,10 +66,6 @@ def generate_gltf_export_preferences(addon_prefs):
     for key in standard_gltf_exporter_settings.keys():
         if str(key) not in constant_keys:
             gltf_export_preferences[key] =  standard_gltf_exporter_settings.get(key)
-    print("")
-    print("export preferences for gltf exporter", gltf_export_preferences)
-
-
     return gltf_export_preferences
 
 
diff --git a/tools/gltf_auto_export/auto_export/get_collections_to_export.py b/tools/gltf_auto_export/auto_export/get_collections_to_export.py
index 93733d5..997fa74 100644
--- a/tools/gltf_auto_export/auto_export/get_collections_to_export.py
+++ b/tools/gltf_auto_export/auto_export/get_collections_to_export.py
@@ -11,6 +11,7 @@ def get_collections_to_export(changes_per_scene, changed_export_parameters, addo
     export_change_detection = getattr(addon_prefs, "export_change_detection")
     export_gltf_extension = getattr(addon_prefs, "export_gltf_extension", ".glb")
     export_blueprints_path = getattr(addon_prefs,"export_blueprints_path", "")
+    collection_instances_combine_mode = getattr(addon_prefs, "collection_instances_combine_mode")
 
     [main_scene_names, level_scenes, library_scene_names, library_scenes] = get_scenes(addon_prefs)
     # get a list of all collections actually in use
diff --git a/tools/gltf_auto_export/auto_export/get_levels_to_export.py b/tools/gltf_auto_export/auto_export/get_levels_to_export.py
index 4aba3a5..c1298b3 100644
--- a/tools/gltf_auto_export/auto_export/get_levels_to_export.py
+++ b/tools/gltf_auto_export/auto_export/get_levels_to_export.py
@@ -7,9 +7,12 @@ def get_levels_to_export(changes_per_scene, changed_export_parameters, addon_pre
     export_change_detection = getattr(addon_prefs, "export_change_detection")
     export_gltf_extension = getattr(addon_prefs, "export_gltf_extension")
     export_models_path = getattr(addon_prefs, "export_models_path")
+    collection_instances_combine_mode = getattr(addon_prefs, "collection_instances_combine_mode")
 
     [main_scene_names, level_scenes, library_scene_names, library_scenes] = get_scenes(addon_prefs)
 
+    # TODO: IF collection_instances_combine_mode is not 'split' check for each scene if any object in changes_per_scene has an instance in the scene
+
     # print("levels export", "export_change_detection", export_change_detection, "changed_export_parameters",changed_export_parameters, "export_models_path", export_models_path, "export_gltf_extension", export_gltf_extension, "changes_per_scene", changes_per_scene)
     # determine list of main scenes to export
     # we have more relaxed rules to determine if the main scenes have changed : any change is ok, (allows easier handling of changes, render settings etc)
diff --git a/tools/gltf_auto_export/auto_export/operators.py b/tools/gltf_auto_export/auto_export/operators.py
index 9dea855..23c44e3 100644
--- a/tools/gltf_auto_export/auto_export/operators.py
+++ b/tools/gltf_auto_export/auto_export/operators.py
@@ -237,7 +237,7 @@ class AutoExportGLTF(Operator, AutoExportGltfAddonPreferences, ExportHelper):
         changes_per_scene = {}
         # TODO : how do we deal with changed scene names ???
         for scene in current:
-            print('scene', scene)
+            # print('scene', scene)
             previous_object_names = list(previous[scene].keys())
             current_object_names =list(current[scene].keys())
             #print("previous_object_names", len(previous_object_names), previous_object_names)
diff --git a/tools/gltf_auto_export/auto_export/tracker.py b/tools/gltf_auto_export/auto_export/tracker.py
index 571a45d..cb2977d 100644
--- a/tools/gltf_auto_export/auto_export/tracker.py
+++ b/tools/gltf_auto_export/auto_export/tracker.py
@@ -73,31 +73,6 @@ class AutoExportTracker(PropertyGroup):
         cls.changed_objects_per_scene.clear()
         # all our logic is done, mark this as done
 
-    @classmethod
-    def deps_pre_update_handler(cls, scene, depsgraph):
-        pass
-        #print("before depsgraph update", scene, depsgraph)
-
-        # only deal with changes if we are NOT in the mids of saving/exporting
-        """if cls.change_detection_enabled:
-            # ignore anything going on with temporary scenes
-            if not scene.name.startswith(TEMPSCENE_PREFIX):
-                print("depsgraph_update_post", scene.name)
-                changed_scene = scene.name or ""
-                #print("-------------")
-              
-                # print("cls.changed_objects_per_scene", cls.changed_objects_per_scene)
-                # depsgraph = bpy.context.evaluated_depsgraph_get()
-                for obj in depsgraph.updates:
-                    #print("depsgraph update", obj)
-                    if isinstance(obj.id, bpy.types.Object):
-                        # get the actual object
-                        object = bpy.data.objects[obj.id.name]
-                        print("  changed object", obj.id.name, "changes", obj, "evalutated", obj.id.is_evaluated, "transforms", obj.is_updated_transform, "geometry", obj.is_updated_geometry)
-                    elif isinstance(obj.id, bpy.types.Material): # or isinstance(obj.id, bpy.types.ShaderNodeTree):
-                        # print("  changed material", obj.id, "scene", scene.name,)
-                        pass"""
-
     @classmethod
     def deps_post_update_handler(cls, scene, depsgraph):
         # print("change detection enabled", cls.change_detection_enabled)
diff --git a/tools/gltf_auto_export/helpers/helpers_scenes.py b/tools/gltf_auto_export/helpers/helpers_scenes.py
index 7bc0b63..c1f890d 100644
--- a/tools/gltf_auto_export/helpers/helpers_scenes.py
+++ b/tools/gltf_auto_export/helpers/helpers_scenes.py
@@ -166,7 +166,6 @@ def duplicate_object(object, parent, combine_mode, destination_collection, libra
 def copy_hollowed_collection_into(source_collection, destination_collection, parent_empty=None, filter=None, library_collections=[], addon_prefs={}):
     collection_instances_combine_mode = getattr(addon_prefs, "collection_instances_combine_mode")
     legacy_mode = getattr(addon_prefs, "export_legacy_mode")
-    collection_instances_combine_mode= collection_instances_combine_mode
 
     for object in source_collection.objects:
         if object.name.endswith("____bak"): # some objects could already have been handled, ignore them
diff --git a/tools/gltf_auto_export/helpers/serialize_scene.py b/tools/gltf_auto_export/helpers/serialize_scene.py
index 060afe4..6e50464 100644
--- a/tools/gltf_auto_export/helpers/serialize_scene.py
+++ b/tools/gltf_auto_export/helpers/serialize_scene.py
@@ -1,4 +1,5 @@
 import json
+from mathutils import Color
 import numpy as np
 import bpy
 from ..constants import TEMPSCENE_PREFIX
@@ -102,7 +103,79 @@ def armature_hash(obj):
         print("bone", bone, bone_hash(bone))"""
     return str(fields)
 
+def field_value(data):
+    pass
+
+def color(color_data):
+    # print("color", color_data, type(color_data))
+    return str(peel_value(color_data))
+
+def lineart(lineart_data):
+    fields_to_ignore = fields_to_ignore_generic
+
+    all_field_names = dir(lineart_data)
+    fields = [getattr(lineart_data, prop, None) for prop in all_field_names if not prop.startswith("__") and not prop in fields_to_ignore and not prop.startswith("show_")]
+    return str(fields)
+
+def node_tree(nodetree_data):
+    fields_to_ignore = fields_to_ignore_generic+ ['contains_tree','get_output_node', 'interface_update', 'override_template_create']
+    all_field_names = dir(nodetree_data)
+    fields = [getattr(nodetree_data, prop, None) for prop in all_field_names if not prop.startswith("__") and not prop in fields_to_ignore and not prop.startswith("show_")]
+
+    # print("node tree", fields)
+    return str(fields)
+
+
+def peel_value( value ):
+        try:
+            len( value )
+            return [ peel_value( x ) for x in value ]
+        except TypeError:
+            return value
+
+def material_hash(material):
+    fields_to_ignore = fields_to_ignore_generic
+    fields_to_convert = {'diffuse_color': color, 'line_color': color, 'lineart': lineart, 'node_tree': node_tree} # TODO: perhaps use types rather than names
+    all_field_names = dir(material)
+    fields = [getattr(material, prop, None) if not prop in fields_to_convert.keys() else fields_to_convert[prop](getattr(material, prop)) for prop in all_field_names if not prop.startswith("__") and not prop in fields_to_ignore and not prop.startswith("show_")]
+
+    type_of = [type(getattr(material, prop, None))  for prop in all_field_names if not prop.startswith("__") and not prop in fields_to_ignore and not prop.startswith("show_")]
+    names = [prop for prop in all_field_names if not prop.startswith("__") and not prop in fields_to_ignore and not prop.startswith("show_")]
+
+    tutu = [t == Color for t in type_of] # bpy.types.MaterialLineArt bpy.types.ShaderNodeTree
+    #print("fields", type_of)
+
+    """for prop in [prop for prop in all_field_names if not prop.startswith("__") and not prop in fields_to_ignore and not prop.startswith("show_")]:
+        bla = getattr(material, prop, None)
+        if hasattr(bla, "rna_type"):
+            print("YOLO", prop, bla, peel_value(bla), "type", type(bla), bla.rna_type, bla.rna_type == bpy.types.FloatProperty, type(bla) == bpy.types.bpy_prop_collection)
+            print("types", type(bla) == bpy.types.bpy_prop_collection, type(bla) == bpy.types.FloatColorAttributeValue)"""
+            
+    # print("oooooh", material, material.bl_rna.properties.items())
+
+    return str(fields)#str(hash(str(fields)))
+
+# TODO: this is partially taken from export_materials utilities, perhaps we could avoid having to fetch things multiple times ?
+def materials_hash(obj, cache):
+    # print("materials")
+    materials = []
+    for material_slot in obj.material_slots:
+        material = material_slot.material
+        cached_hash = cache['materials'].get(material.name, None)
+        if cached_hash:
+            # print("CACHHHHHED", cached_hash)
+            materials.append(cached_hash)
+        else:
+            mat = material_hash(material)
+            cache['materials'][material.name] = mat
+            materials.append(mat)
+            # print("NOT CACHHH", mat)
+
+    # materials = [material_hash(material_slot.material) if not material_slot.material.name in cache["materials"] else cache["materials"][material_slot.material.name]  for material_slot in obj.material_slots]
+    return str(hash(str(materials)))
+
 def serialize_scene(): 
+    cache = {"materials":{}}
     print("serializing scene")
     data = {}
     for scene in bpy.data.scenes:
@@ -128,6 +201,7 @@ def serialize_scene():
             armature = armature_hash(object) if object.type == 'ARMATURE' else None
             parent = object.parent.name if object.parent else None
             collections = [collection.name for collection in object.users_collection]
+            materials = materials_hash(object, cache) if len(object.material_slots) > 0 else None
 
             data[scene.name][object.name] = {
                 "name": object.name,
@@ -140,7 +214,8 @@ def serialize_scene():
                 "light": light,
                 "armature": armature,
                 "parent": parent,
-                "collections": collections
+                "collections": collections,
+                "materials": materials
             }
 
     """print("data", data)
diff --git a/tools/gltf_auto_export/tests/test_change_tracking.py b/tools/gltf_auto_export/tests/test_change_tracking.py
index c1fabff..c741289 100644
--- a/tools/gltf_auto_export/tests/test_change_tracking.py
+++ b/tools/gltf_auto_export/tests/test_change_tracking.py
@@ -420,11 +420,11 @@ def test_export_change_tracking_material_properties(setup_data):
         mapped_files_to_timestamps_and_index[file_path] = (modification_times_first[index], index)
 
     print("----------------")
-    print("main scene change (material)")
+    print("main scene change (material, clip)")
     print("----------------")
 
     bpy.data.materials["Material.001"].blend_method = 'CLIP'
-    
+
     auto_export_operator(
         auto_export=True,
         direct_mode=True,
@@ -437,12 +437,82 @@ def test_export_change_tracking_material_properties(setup_data):
 
     modification_times = list(map(lambda file_path: os.path.getmtime(file_path), model_library_file_paths + [world_file_path]))
     assert modification_times != modification_times_first
-    # only the "world" file should have changed
-    world_file_index = mapped_files_to_timestamps_and_index["World"][1]
-    other_files_modification_times = [value for index, value in enumerate(modification_times) if index not in [world_file_index]]
-    other_files_modification_times_first = [value for index, value in enumerate(modification_times_first) if index not in [world_file_index]]
+    # the material is assigned to Blueprint 1 so in normal (split mode) only the "Blueprint1" file should have changed
+    blueprint1_file_index = mapped_files_to_timestamps_and_index["Blueprint1"][1]
+    # the same material is assigned to Blueprint 7 so in normal (split mode) only the "Blueprint1" file should have changed
+    blueprint7_file_index = mapped_files_to_timestamps_and_index["Blueprint7_hierarchy"][1]
 
-    assert modification_times[world_file_index] != modification_times_first[world_file_index]
+    other_files_modification_times = [value for index, value in enumerate(modification_times) if index not in [blueprint1_file_index, blueprint7_file_index]]
+    other_files_modification_times_first = [value for index, value in enumerate(modification_times_first) if index not in [blueprint1_file_index, blueprint7_file_index]]
+
+    assert modification_times[blueprint1_file_index] != modification_times_first[blueprint1_file_index]
+    assert modification_times[blueprint7_file_index] != modification_times_first[blueprint7_file_index]
+
+    assert other_files_modification_times == other_files_modification_times_first
+
+    # reset the comparing 
+    modification_times_first = modification_times
+
+    print("----------------")
+    print("main scene change (material, alpha_threshold)")
+    print("----------------")
+    bpy.data.materials["Material.001"].alpha_threshold = 0.2
+
+    auto_export_operator(
+        auto_export=True,
+        direct_mode=True,
+        export_output_folder="./models",
+        export_scene_settings=True,
+        export_blueprints=True,
+        export_legacy_mode=False,
+        export_materials_library=False
+    )
+
+    modification_times = list(map(lambda file_path: os.path.getmtime(file_path), model_library_file_paths + [world_file_path]))
+    assert modification_times != modification_times_first
+    # the material is assigned to Blueprint 1 so in normal (split mode) only the "Blueprint1" file should have changed
+    blueprint1_file_index = mapped_files_to_timestamps_and_index["Blueprint1"][1]
+    # the same material is assigned to Blueprint 7 so in normal (split mode) only the "Blueprint1" file should have changed
+    blueprint7_file_index = mapped_files_to_timestamps_and_index["Blueprint7_hierarchy"][1]
+
+    other_files_modification_times = [value for index, value in enumerate(modification_times) if index not in [blueprint1_file_index, blueprint7_file_index]]
+    other_files_modification_times_first = [value for index, value in enumerate(modification_times_first) if index not in [blueprint1_file_index, blueprint7_file_index]]
+
+    assert modification_times[blueprint1_file_index] != modification_times_first[blueprint1_file_index]
+    assert modification_times[blueprint7_file_index] != modification_times_first[blueprint7_file_index]
+    assert other_files_modification_times == other_files_modification_times_first
+
+
+     # reset the comparing 
+    modification_times_first = modification_times
+
+    print("----------------")
+    print("main scene change (material, diffuse_color)")
+    print("----------------")
+    bpy.data.materials["Material.001"].diffuse_color[0] = 0.2
+
+    auto_export_operator(
+        auto_export=True,
+        direct_mode=True,
+        export_output_folder="./models",
+        export_scene_settings=True,
+        export_blueprints=True,
+        export_legacy_mode=False,
+        export_materials_library=False
+    )
+
+    modification_times = list(map(lambda file_path: os.path.getmtime(file_path), model_library_file_paths + [world_file_path]))
+    assert modification_times != modification_times_first
+    # the material is assigned to Blueprint 1 so in normal (split mode) only the "Blueprint1" file should have changed
+    blueprint1_file_index = mapped_files_to_timestamps_and_index["Blueprint1"][1]
+    # the same material is assigned to Blueprint 7 so in normal (split mode) only the "Blueprint1" file should have changed
+    blueprint7_file_index = mapped_files_to_timestamps_and_index["Blueprint7_hierarchy"][1]
+
+    other_files_modification_times = [value for index, value in enumerate(modification_times) if index not in [blueprint1_file_index, blueprint7_file_index]]
+    other_files_modification_times_first = [value for index, value in enumerate(modification_times_first) if index not in [blueprint1_file_index, blueprint7_file_index]]
+
+    assert modification_times[blueprint1_file_index] != modification_times_first[blueprint1_file_index]
+    assert modification_times[blueprint7_file_index] != modification_times_first[blueprint7_file_index]
     assert other_files_modification_times == other_files_modification_times_first
 
 
@@ -456,7 +526,7 @@ def test_export_change_tracking_material_properties(setup_data):
 - removes generated files
 
 """
-def test_export_various_changes(setup_data):
+def test_export_various_chained_changes(setup_data):
     root_path = "../../testing/bevy_example"
     assets_root_path = os.path.join(root_path, "assets")
     models_path = os.path.join(assets_root_path, "models")
@@ -626,6 +696,7 @@ def test_export_various_changes(setup_data):
     assert modification_times[blueprint3_file_index] != modification_times_first[blueprint3_file_index]
     assert modification_times[blueprint4_file_index] == modification_times_first[blueprint4_file_index]
     assert other_files_modification_times == other_files_modification_times_first
+
     # reset the comparing 
     modification_times_first = modification_times
 
@@ -633,16 +704,14 @@ def test_export_various_changes(setup_data):
     print("----------------")
     print("change using operator")
     print("----------------")
-    bpy.context.window_manager.auto_export_tracker.enable_change_detection() # FIXME: should not be needed, but ..
 
-    with bpy.context.temp_override(active_object=bpy.data.objects["Cube"], selected_objects=[bpy.data.objects["Cube"]]):
+    with bpy.context.temp_override(active_object=bpy.data.objects["Cube"], selected_objects=[bpy.data.objects["Cube"]], scene=bpy.data.scenes["World"]):
         print("translate using operator")
         bpy.ops.transform.translate(value=mathutils.Vector((2.0, 1.0, -5.0)))
         bpy.ops.transform.rotate(value=0.378874, constraint_axis=(False, False, True), mirror=False, proportional_edit_falloff='SMOOTH', proportional_size=1)
         bpy.ops.object.transform_apply()
         bpy.ops.transform.translate(value=(3.5, 0, 0), constraint_axis=(True, False, False))
 
-    
     auto_export_operator(
         auto_export=True,
         direct_mode=True,
diff --git a/tools/gltf_auto_export/todo.md b/tools/gltf_auto_export/todo.md
index 2929287..476f924 100644
--- a/tools/gltf_auto_export/todo.md
+++ b/tools/gltf_auto_export/todo.md
@@ -4,6 +4,14 @@
 - undo redo is ignored: ie save, do something, undo it, you still get changes
 
 
-- for collection instances: 
-   * [ ] blueprints export should also take the split/embed mode into account: if a nested collection changes AND embed is active, its container collection should also be exported
-   * [ ] level exports should do the same
\ No newline at end of file
+- [ ] serialize scene
+   - [ ] for collection instances: 
+      * [ ] blueprints export should also take the split/embed mode into account: if a nested collection changes AND embed is active, its container collection should also be exported
+      * [ ] level exports should do the same
+   - [ ] add tests for the above
+   - [ ] look into caching for serialize scene
+   - [ ] replace field name based logic with type base logic 
+
+- [ ] remove bulk of tracker related code
+- [ ] clean up
+- [x] split up change detection in settings to its own panel
\ No newline at end of file
diff --git a/tools/gltf_auto_export/ui/main.py b/tools/gltf_auto_export/ui/main.py
index f27c4fd..3c3a314 100644
--- a/tools/gltf_auto_export/ui/main.py
+++ b/tools/gltf_auto_export/ui/main.py
@@ -143,10 +143,41 @@ class GLTF_PT_auto_export_general(bpy.types.Panel):
 
         layout.active = operator.auto_export
         layout.prop(operator, "export_output_folder")
-        layout.prop(operator, "export_change_detection")
         layout.prop(operator, "export_scene_settings")
         layout.prop(operator, "export_legacy_mode")
 
+
+class GLTF_PT_auto_export_change_detection(bpy.types.Panel):
+    bl_space_type = 'FILE_BROWSER'
+    bl_region_type = 'TOOL_PROPS'
+    bl_label = "Change detection"
+    bl_parent_id = "GLTF_PT_auto_export_root"
+
+    @classmethod
+    def poll(cls, context):
+        sfile = context.space_data
+        operator = sfile.active_operator
+
+        return operator.bl_idname == "EXPORT_SCENES_OT_auto_gltf" #"EXPORT_SCENE_OT_gltf"
+    def draw_header(self, context):
+        layout = self.layout
+        sfile = context.space_data
+        operator = sfile.active_operator
+        layout.prop(operator, "export_change_detection", text="")
+
+    def draw(self, context):
+        layout = self.layout
+        layout.use_property_split = True
+        layout.use_property_decorate = False  # No animation.
+
+        sfile = context.space_data
+        operator = sfile.active_operator
+
+        layout.active = operator.auto_export
+        layout.prop(operator, "export_change_detection")
+
+
+
 class GLTF_PT_auto_export_scenes(bpy.types.Panel):
     bl_space_type = 'FILE_BROWSER'
     bl_region_type = 'TOOL_PROPS'
@@ -251,8 +282,6 @@ class GLTF_PT_auto_export_blueprints(bpy.types.Panel):
         operator = sfile.active_operator
         layout.prop(operator, "export_blueprints", text="")
 
-        #self.layout.prop(operator, "auto_export", text="")
-
     def draw(self, context):
         layout = self.layout
         layout.use_property_split = True