diff --git a/lib/Slic3r/GUI/MainFrame.pm b/lib/Slic3r/GUI/MainFrame.pm
index c48186c76..626bdef81 100644
--- a/lib/Slic3r/GUI/MainFrame.pm
+++ b/lib/Slic3r/GUI/MainFrame.pm
@@ -27,6 +27,8 @@ our $VALUE_CHANGE_EVENT    = Wx::NewEventType;
 our $PRESETS_CHANGED_EVENT = Wx::NewEventType;
 # 3) To inform about a change of object selection
 our $OBJECT_SELECTION_CHANGED_EVENT = Wx::NewEventType;
+# 4) To inform about a change of object settings
+our $OBJECT_SETTINGS_CHANGED_EVENT = Wx::NewEventType;
 
 sub new {
     my ($class, %params) = @_;
@@ -117,6 +119,7 @@ sub _init_tabpanel {
     if (!$self->{no_plater}) {
         $panel->AddPage($self->{plater} = Slic3r::GUI::Plater->new($panel,
             event_object_selection_changed   => $OBJECT_SELECTION_CHANGED_EVENT,
+            event_object_settings_changed    => $OBJECT_SETTINGS_CHANGED_EVENT,
             ), L("Plater"));
         if (!$self->{no_controller}) {
             $panel->AddPage($self->{controller} = Slic3r::GUI::Controller->new($panel), L("Controller"));
@@ -173,14 +176,25 @@ sub _init_tabpanel {
         }
     });
 
-    # The following event is emited by the C++ Tab implementation on config value change.
+    # The following event is emited by the C++ Tab implementation on object selection change.
     EVT_COMMAND($self, -1, $OBJECT_SELECTION_CHANGED_EVENT, sub {
         my ($self, $event) = @_;
         my $obj_idx = $event->GetInt;
 
         $self->{plater}->select_object($obj_idx < 0 ? undef: $obj_idx);
         $self->{plater}->item_changed_selection($obj_idx);
-    });       
+    });
+
+    # The following event is emited by the C++ Tab implementation on object settings change.
+    EVT_COMMAND($self, -1, $OBJECT_SETTINGS_CHANGED_EVENT, sub {
+        my ($self, $event) = @_;
+        my $obj_idx = $event->GetInt;
+
+        #my $line = $event->GetString;
+        #my ($parts_changed, $part_settings_changed) = split('',$line);
+
+        #$self->{plater}->changed_object_settings($obj_idx, $parts_changed, $part_settings_changed);
+    });
         
 
     Slic3r::GUI::create_preset_tabs($self->{no_controller}, $VALUE_CHANGE_EVENT, $PRESETS_CHANGED_EVENT);
diff --git a/lib/Slic3r/GUI/Plater.pm b/lib/Slic3r/GUI/Plater.pm
index 689ccff28..bc149a828 100644
--- a/lib/Slic3r/GUI/Plater.pm
+++ b/lib/Slic3r/GUI/Plater.pm
@@ -56,6 +56,7 @@ sub new {
 
     # store input params
     $self->{event_object_selection_changed} = $params{event_object_selection_changed};
+    $self->{event_object_settings_changed} = $params{event_object_settings_changed};
 
     # C++ Slic3r::Model with Perl extensions in Slic3r/Model.pm
     $self->{model} = Slic3r::Model->new;
@@ -398,13 +399,15 @@ sub new {
         Slic3r::GUI::add_frequently_changed_parameters($self->{right_panel}, $frequently_changed_parameters_sizer, $presets);
 
         my $expert_mode_part_sizer = Wx::BoxSizer->new(wxVERTICAL);
-        Slic3r::GUI::add_expert_mode_part($self->{right_panel}, $expert_mode_part_sizer, $self->{event_object_selection_changed});
-        if ($expert_mode_part_sizer->IsShown(2)==1) 
-        { 
-            $expert_mode_part_sizer->Layout;
-            $expert_mode_part_sizer->Show(2, 0); # ? Why doesn't work
-            $self->{right_panel}->Layout;
-        }
+        Slic3r::GUI::add_expert_mode_part(  $self->{right_panel}, $expert_mode_part_sizer, 
+                                            $self->{event_object_selection_changed},
+                                            $self->{event_object_settings_changed});
+#        if ($expert_mode_part_sizer->IsShown(2)==1) 
+#        { 
+#           $expert_mode_part_sizer->Layout;
+#            $expert_mode_part_sizer->Show(2, 0); # ? Why doesn't work
+#            $self->{right_panel}->Layout;
+#       }
 
         my $object_info_sizer;
         {
@@ -1960,6 +1963,29 @@ sub object_settings_dialog {
     }
 }
 
+sub changed_object_settings {
+    my ($self, $obj_idx, $parts_changed, $part_settings_changed) = @_;
+    
+    # update thumbnail since parts may have changed
+    if ($parts_changed) {
+        # recenter and re-align to Z = 0
+        my $model_object = $self->{model}->objects->[$obj_idx];
+        $model_object->center_around_origin;
+        $self->reset_thumbnail($obj_idx);
+    }
+    
+    # update print
+    if ($parts_changed || $part_settings_changed) {
+        $self->stop_background_process;
+        $self->{print}->reload_object($obj_idx);
+        $self->schedule_background_process;
+        $self->{canvas}->reload_scene if $self->{canvas};
+        $self->{canvas3D}->reload_scene if $self->{canvas3D};
+    } else {
+        $self->resume_background_process;
+    }
+}
+
 # Called to update various buttons depending on whether there are any objects or
 # whether background processing (export of a G-code, sending to Octoprint, forced background re-slicing) is active.
 sub object_list_changed {
diff --git a/xs/src/slic3r/GUI/GUI.cpp b/xs/src/slic3r/GUI/GUI.cpp
index a34b6f1d7..01a61ff51 100644
--- a/xs/src/slic3r/GUI/GUI.cpp
+++ b/xs/src/slic3r/GUI/GUI.cpp
@@ -143,6 +143,7 @@ wxDataViewCtrl			*m_objects_ctrl = nullptr;
 MyObjectTreeModel		*m_objects_model = nullptr;
 wxCollapsiblePane		*m_collpane_settings = nullptr;
 int			m_event_object_selection_changed = 0;
+int			m_event_object_settings_changed = 0;
 bool		g_prevent_list_events = false;		// We use this flag to avoid circular event handling Select() 
 												// happens to fire a wxEVT_LIST_ITEM_SELECTED on OSX, whose event handler 
 												// calls this method again and again and again
@@ -1163,9 +1164,12 @@ void select_current_object(int idx)
 	}
 }
 
-void add_expert_mode_part(wxWindow* parent, wxBoxSizer* sizer, int event_object_selection_changed)
+void add_expert_mode_part(	wxWindow* parent, wxBoxSizer* sizer, 
+							int event_object_selection_changed,
+							int event_object_settings_changed)
 {
 	m_event_object_selection_changed = event_object_selection_changed;
+	m_event_object_settings_changed = event_object_settings_changed;
 	wxWindowUpdateLocker noUpdates(parent);
 
 	// *** Objects List ***	
diff --git a/xs/src/slic3r/GUI/GUI.hpp b/xs/src/slic3r/GUI/GUI.hpp
index 894751f61..277729ab0 100644
--- a/xs/src/slic3r/GUI/GUI.hpp
+++ b/xs/src/slic3r/GUI/GUI.hpp
@@ -202,7 +202,9 @@ void unselect_objects();
 // Select current object in the list on c++ side
 void select_current_object(int idx);
 
-void add_expert_mode_part(wxWindow* parent, wxBoxSizer* sizer, int event_object_selection_changed);
+void add_expert_mode_part(	wxWindow* parent, wxBoxSizer* sizer, 
+							int event_object_selection_changed,
+							int event_object_settings_changed);
 void add_frequently_changed_parameters(wxWindow* parent, wxBoxSizer* sizer, wxFlexGridSizer* preset_sizer);
 // Update view mode according to selected menu 
 void update_mode();
diff --git a/xs/xsp/GUI.xsp b/xs/xsp/GUI.xsp
index ba4c2e7fd..ba800f38a 100644
--- a/xs/xsp/GUI.xsp
+++ b/xs/xsp/GUI.xsp
@@ -83,9 +83,13 @@ void add_frequently_changed_parameters(SV *ui_parent, SV *ui_sizer, SV *ui_p_siz
                                                            (wxBoxSizer*)wxPli_sv_2_object(aTHX_ ui_sizer, "Wx::BoxSizer"),
                                                            (wxFlexGridSizer*)wxPli_sv_2_object(aTHX_ ui_p_sizer, "Wx::FlexGridSizer")); %};
 
-void add_expert_mode_part(SV *ui_parent, SV *ui_sizer, int event)
-    %code%{ Slic3r::GUI::add_expert_mode_part((wxWindow*)wxPli_sv_2_object(aTHX_ ui_parent, "Wx::Window"),
-                                                           (wxBoxSizer*)wxPli_sv_2_object(aTHX_ ui_sizer, "Wx::BoxSizer"), event); %};
+void add_expert_mode_part(  SV *ui_parent, SV *ui_sizer, 
+                            int event_object_selection_changed,
+                            int event_object_settings_changed)
+    %code%{ Slic3r::GUI::add_expert_mode_part(  (wxWindow*)wxPli_sv_2_object(aTHX_ ui_parent, "Wx::Window"),
+                                                (wxBoxSizer*)wxPli_sv_2_object(aTHX_ ui_sizer, "Wx::BoxSizer"), 
+                                                event_object_selection_changed,
+                                                event_object_settings_changed); %};
 
 void set_objects_from_perl( SV *ui_parent, 
                             SV *frequently_changed_parameters_sizer,