Add skeleton_root property and UI

io_scene_niftools/properties/object.py

@@ -150,6 +150,11 @@ class ObjectProperty(PropertyGroup):
         type=ExtraDataStore,
     )
 
+    skeleton_root: StringProperty(
+        name='Skeleton Root',
+        description="The bone that acts as the root of the SkinInstance",
+    )
+
 
 class BsInventoryMarker(PropertyGroup):
 

io_scene_niftools/ui/object.py

@@ -56,7 +56,8 @@ class ObjectPanel(Panel):
         return True
 
     def draw(self, context):
-        nif_obj_props = context.object.niftools
+        ob = context.object
+        nif_obj_props = ob.niftools
 
         layout = self.layout
         row = layout.column()
@@ -68,6 +69,10 @@ class ObjectPanel(Panel):
         row.prop(nif_obj_props, "flags")
         row.prop(nif_obj_props, "longname")
 
+        parent = ob.parent
+        if parent and parent.type == 'ARMATURE':
+            row.prop_search(nif_obj_props, "skeleton_root", parent.data, "bones")
+
 
 class ObjectExtraData(Panel):
     bl_label = "Niftools Object Extra Data"