diff --git a/lib/Slic3r/GUI/3DScene.pm b/lib/Slic3r/GUI/3DScene.pm
index 23b87d6610..17e2e63775 100644
--- a/lib/Slic3r/GUI/3DScene.pm
+++ b/lib/Slic3r/GUI/3DScene.pm
@@ -110,7 +110,9 @@ __PACKAGE__->mk_accessors( qw(_quat init
                               
 use constant TRACKBALLSIZE  => 0.8;
 use constant TURNTABLE_MODE => 1;
-use constant GROUND_Z       => -0.02;
+#==============================================================================================================================
+#use constant GROUND_Z       => -0.02;
+#==============================================================================================================================
 # For mesh selection: Not selected - bright yellow.
 use constant DEFAULT_COLOR  => [1,1,0];
 # For mesh selection: Selected - bright green.
@@ -127,13 +129,11 @@ use constant HOVER_COLOR    => [0.4,0.9,0,1];
 #use constant VIEW_BOTTOM     => [0.0,180.0];
 #use constant VIEW_FRONT      => [0.0,90.0];
 #use constant VIEW_REAR       => [180.0,90.0];
-#==============================================================================================================================
-
-use constant MANIPULATION_IDLE          => 0;
-use constant MANIPULATION_DRAGGING      => 1;
-use constant MANIPULATION_LAYER_HEIGHT  => 2;
-
-#==============================================================================================================================
+#
+#use constant MANIPULATION_IDLE          => 0;
+#use constant MANIPULATION_DRAGGING      => 1;
+#use constant MANIPULATION_LAYER_HEIGHT  => 2;
+#
 #use constant GIMBALL_LOCK_THETA_MAX => 180;
 #==============================================================================================================================
 
@@ -223,7 +223,10 @@ sub new {
     $self->{layer_height_edit_last_z} = 0.;
     $self->{layer_height_edit_last_action} = 0;
 
-    $self->reset_objects;
+#==============================================================================================================================
+    Slic3r::GUI::_3DScene::reset_volumes($self);
+#    $self->reset_objects;
+#==============================================================================================================================
     
     EVT_PAINT($self, sub {
         my $dc = Wx::PaintDC->new($self);
@@ -723,19 +726,18 @@ sub mouse_wheel_event {
     $self->Refresh;
 }
 
-# Reset selection.
-sub reset_objects {
-    my ($self) = @_;
-    if ($self->GetContext) {
-        $self->SetCurrent($self->GetContext);
-        $self->volumes->release_geometry;
-    }
-    $self->volumes->erase;
 #==============================================================================================================================
-    Slic3r::GUI::_3DScene::set_dirty($self, 1);
+## Reset selection.
+#sub reset_objects {
+#    my ($self) = @_;
+#    if ($self->GetContext) {
+#        $self->SetCurrent($self->GetContext);
+#        $self->volumes->release_geometry;
+#    }
+#    $self->volumes->erase;
 #    $self->_dirty(1);
+#}
 #==============================================================================================================================
-}
 
 # Setup camera to view all objects.
 sub set_viewport_from_scene {
@@ -1515,8 +1517,10 @@ sub Render {
     # draw ground and axes
     glDisable(GL_LIGHTING);
     
-    # draw ground
-    my $ground_z = GROUND_Z;
+#==============================================================================================================================
+#    # draw ground
+#    my $ground_z = GROUND_Z;
+#==============================================================================================================================
 #==============================================================================================================================
     Slic3r::GUI::_3DScene::render_bed($self);
     
diff --git a/lib/Slic3r/GUI/Plater/3D.pm b/lib/Slic3r/GUI/Plater/3D.pm
index 2706df509f..6c3e02e09b 100644
--- a/lib/Slic3r/GUI/Plater/3D.pm
+++ b/lib/Slic3r/GUI/Plater/3D.pm
@@ -197,7 +197,10 @@ sub update_volumes_selection {
 sub reload_scene {
     my ($self, $force) = @_;
 
-    $self->reset_objects;
+#==============================================================================================================================
+    Slic3r::GUI::_3DScene::reset_volumes($self);
+#    $self->reset_objects;
+#==============================================================================================================================
     $self->update_bed_size;
 
     if (! $self->IsShown && ! $force) {
diff --git a/lib/Slic3r/GUI/Plater/3DPreview.pm b/lib/Slic3r/GUI/Plater/3DPreview.pm
index 96c28fee5b..0aff64310c 100644
--- a/lib/Slic3r/GUI/Plater/3DPreview.pm
+++ b/lib/Slic3r/GUI/Plater/3DPreview.pm
@@ -277,8 +277,11 @@ sub new {
 
 sub reload_print {
     my ($self, $force) = @_;
-    
-    $self->canvas->reset_objects;
+
+#==============================================================================================================================
+    Slic3r::GUI::_3DScene::reset_volumes($self->canvas);
+#    $self->canvas->reset_objects;
+#==============================================================================================================================
     $self->_loaded(0);
 
     if (! $self->IsShown && ! $force) {
diff --git a/lib/Slic3r/GUI/Plater/ObjectCutDialog.pm b/lib/Slic3r/GUI/Plater/ObjectCutDialog.pm
index 80ba4db506..b379ba8ef7 100644
--- a/lib/Slic3r/GUI/Plater/ObjectCutDialog.pm
+++ b/lib/Slic3r/GUI/Plater/ObjectCutDialog.pm
@@ -254,8 +254,11 @@ sub _update {
                     for @$expolygon;
                 $expolygon->translate(map Slic3r::Geometry::scale($_), @{ $self->{model_object}->instances->[0]->offset });
             }
-            
-            $self->{canvas}->reset_objects;
+
+#==============================================================================================================================
+            Slic3r::GUI::_3DScene::reset_volumes($self->{canvas});           
+#            $self->{canvas}->reset_objects;
+#==============================================================================================================================
             $self->{canvas}->load_object($_, undef, undef, [0]) for @objects;
             $self->{canvas}->SetCuttingPlane(
                 $self->{cut_options}{z},
diff --git a/lib/Slic3r/GUI/Plater/ObjectPartsPanel.pm b/lib/Slic3r/GUI/Plater/ObjectPartsPanel.pm
index 9320e66664..a2b779a0ab 100644
--- a/lib/Slic3r/GUI/Plater/ObjectPartsPanel.pm
+++ b/lib/Slic3r/GUI/Plater/ObjectPartsPanel.pm
@@ -494,7 +494,10 @@ sub _parts_changed {
     
     $self->reload_tree;
     if ($self->{canvas}) {
-        $self->{canvas}->reset_objects;
+#==============================================================================================================================
+        Slic3r::GUI::_3DScene::reset_volumes($self->{canvas});           
+#        $self->{canvas}->reset_objects;
+#==============================================================================================================================
         $self->{canvas}->load_object($self->{model_object});
         $self->{canvas}->zoom_to_volumes;
         $self->{canvas}->update_volumes_colors_by_extruder($self->GetParent->GetParent->GetParent->{config});
@@ -539,7 +542,10 @@ sub _update_canvas {
     my ($self) = @_;
     
     if ($self->{canvas}) {
-        $self->{canvas}->reset_objects;
+#==============================================================================================================================
+        Slic3r::GUI::_3DScene::reset_volumes($self->{canvas});           
+#        $self->{canvas}->reset_objects;
+#==============================================================================================================================
         $self->{canvas}->load_object($self->{model_object});
 
         # restore selection, if any
@@ -572,7 +578,10 @@ sub _update {
     $self->{parts_changed} = 1;
     my @objects = ();
     push @objects, $self->{model_object};
-    $self->{canvas}->reset_objects;
+#==============================================================================================================================
+    Slic3r::GUI::_3DScene::reset_volumes($self->{canvas});           
+#    $self->{canvas}->reset_objects;
+#==============================================================================================================================
     $self->{canvas}->load_object($_, undef, [0]) for @objects;
     $self->{canvas}->update_volumes_colors_by_extruder($self->GetParent->GetParent->GetParent->{config});
     $self->{canvas}->Render;
diff --git a/xs/src/slic3r/GUI/3DScene.cpp b/xs/src/slic3r/GUI/3DScene.cpp
index 02dfd18aef..bb1527f8da 100644
--- a/xs/src/slic3r/GUI/3DScene.cpp
+++ b/xs/src/slic3r/GUI/3DScene.cpp
@@ -1772,6 +1772,11 @@ void _3DScene::set_volumes(wxGLCanvas* canvas, GLVolumeCollection* volumes)
     s_canvas_mgr.set_volumes(canvas, volumes);
 }
 
+void _3DScene::reset_volumes(wxGLCanvas* canvas)
+{
+    s_canvas_mgr.reset_volumes(canvas);
+}
+
 void _3DScene::set_bed_shape(wxGLCanvas* canvas, const Pointfs& shape)
 {
     return s_canvas_mgr.set_bed_shape(canvas, shape);
@@ -1887,6 +1892,11 @@ void _3DScene::set_camera_target(wxGLCanvas* canvas, const Pointf3* target)
 {
     s_canvas_mgr.set_camera_target(canvas, target);
 }
+ 
+bool _3DScene::is_layers_editing_enabled(wxGLCanvas* canvas)
+{
+    return s_canvas_mgr.is_layers_editing_enabled(canvas);
+}
 
 void _3DScene::zoom_to_bed(wxGLCanvas* canvas)
 {
diff --git a/xs/src/slic3r/GUI/3DScene.hpp b/xs/src/slic3r/GUI/3DScene.hpp
index 2ae07d858d..3f4ecc6376 100644
--- a/xs/src/slic3r/GUI/3DScene.hpp
+++ b/xs/src/slic3r/GUI/3DScene.hpp
@@ -552,6 +552,8 @@ public:
     static GLVolumeCollection* get_volumes(wxGLCanvas* canvas);
     static void set_volumes(wxGLCanvas* canvas, GLVolumeCollection* volumes);
 
+    static void reset_volumes(wxGLCanvas* canvas);
+
     static void set_bed_shape(wxGLCanvas* canvas, const Pointfs& shape);
     static void set_auto_bed_shape(wxGLCanvas* canvas);
 
@@ -586,6 +588,8 @@ public:
     static Pointf3 get_camera_target(wxGLCanvas* canvas);
     static void set_camera_target(wxGLCanvas* canvas, const Pointf3* target);
 
+    static bool is_layers_editing_enabled(wxGLCanvas* canvas);
+
     static void zoom_to_bed(wxGLCanvas* canvas);
     static void zoom_to_volumes(wxGLCanvas* canvas);
     static void select_view(wxGLCanvas* canvas, const std::string& direction);
diff --git a/xs/src/slic3r/GUI/GLCanvas3D.cpp b/xs/src/slic3r/GUI/GLCanvas3D.cpp
index de875841cc..7a47028809 100644
--- a/xs/src/slic3r/GUI/GLCanvas3D.cpp
+++ b/xs/src/slic3r/GUI/GLCanvas3D.cpp
@@ -395,6 +395,16 @@ void GLCanvas3D::CuttingPlane::render_contour()
     ::glDisableClientState(GL_VERTEX_ARRAY);
 }
 
+GLCanvas3D::LayersEditing::LayersEditing()
+    : m_enabled(false)
+{
+}
+
+bool GLCanvas3D::LayersEditing::is_enabled() const
+{
+    return m_enabled;
+}
+
 GLCanvas3D::GLCanvas3D(wxGLCanvas* canvas, wxGLContext* context)
     : m_canvas(canvas)
     , m_context(context)
@@ -409,10 +419,15 @@ GLCanvas3D::~GLCanvas3D()
     _deregister_callbacks();
 }
 
-void GLCanvas3D::set_current()
+bool GLCanvas3D::set_current()
 {
     if ((m_canvas != nullptr) && (m_context != nullptr))
+    {
         m_canvas->SetCurrent(*m_context);
+        return true;
+    }
+
+    return false;
 }
 
 bool GLCanvas3D::is_dirty() const
@@ -507,6 +522,16 @@ void GLCanvas3D::set_volumes(GLVolumeCollection* volumes)
     m_volumes = volumes;
 }
 
+void GLCanvas3D::reset_volumes()
+{
+    if (set_current() && (m_volumes != nullptr))
+    {
+        m_volumes->release_geometry();
+        m_volumes->clear();
+        set_dirty(true);
+    }
+}
+
 void GLCanvas3D::set_bed_shape(const Pointfs& shape)
 {
     m_bed.set_shape(shape);
@@ -652,6 +677,11 @@ BoundingBoxf3 GLCanvas3D::max_bounding_box() const
     return bb;
 }
 
+bool GLCanvas3D::is_layers_editing_enabled() const
+{
+    return m_layers_editing.is_enabled();
+}
+
 void GLCanvas3D::zoom_to_bed()
 {
     _zoom_to_bounding_box(bed_bounding_box());
diff --git a/xs/src/slic3r/GUI/GLCanvas3D.hpp b/xs/src/slic3r/GUI/GLCanvas3D.hpp
index 201a840bed..558e6c350e 100644
--- a/xs/src/slic3r/GUI/GLCanvas3D.hpp
+++ b/xs/src/slic3r/GUI/GLCanvas3D.hpp
@@ -128,6 +128,16 @@ public:
         void render_contour();
     };
 
+    class LayersEditing
+    {
+        bool m_enabled;
+
+    public:
+        LayersEditing();
+
+        bool is_enabled() const;
+    };
+
 private:
     wxGLCanvas* m_canvas;
     wxGLContext* m_context;
@@ -135,6 +145,7 @@ private:
     Bed m_bed;
     Axes m_axes;
     CuttingPlane m_cutting_plane;
+    LayersEditing m_layers_editing;
 
     GLVolumeCollection* m_volumes;
 
@@ -147,7 +158,7 @@ public:
     GLCanvas3D(wxGLCanvas* canvas, wxGLContext* context);
     ~GLCanvas3D();
 
-    void set_current();
+    bool set_current();
 
     bool is_dirty() const;
     void set_dirty(bool dirty);
@@ -159,6 +170,8 @@ public:
     GLVolumeCollection* get_volumes();
     void set_volumes(GLVolumeCollection* volumes);
 
+    void reset_volumes();
+
     // Set the bed shape to a single closed 2D polygon(array of two element arrays),
     // triangulate the bed and store the triangles into m_bed.m_triangles,
     // fills the m_bed.m_grid_lines and sets m_bed.m_origin.
@@ -198,6 +211,8 @@ public:
     BoundingBoxf3 volumes_bounding_box() const;
     BoundingBoxf3 max_bounding_box() const;
 
+    bool is_layers_editing_enabled() const;
+
     void zoom_to_bed();
     void zoom_to_volumes();
     void select_view(const std::string& direction);
diff --git a/xs/src/slic3r/GUI/GLCanvas3DManager.cpp b/xs/src/slic3r/GUI/GLCanvas3DManager.cpp
index 48241dafb1..f4cf4235ed 100644
--- a/xs/src/slic3r/GUI/GLCanvas3DManager.cpp
+++ b/xs/src/slic3r/GUI/GLCanvas3DManager.cpp
@@ -187,6 +187,13 @@ void GLCanvas3DManager::set_volumes(wxGLCanvas* canvas, GLVolumeCollection* volu
         it->second->set_volumes(volumes);
 }
 
+void GLCanvas3DManager::reset_volumes(wxGLCanvas* canvas)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->reset_volumes();
+}
+
 void GLCanvas3DManager::set_bed_shape(wxGLCanvas* canvas, const Pointfs& shape)
 {
     CanvasesMap::iterator it = _get_canvas(canvas);
@@ -342,6 +349,12 @@ void GLCanvas3DManager::set_camera_target(wxGLCanvas* canvas, const Pointf3* tar
         it->second->set_camera_target(*target);
 }
 
+bool GLCanvas3DManager::is_layers_editing_enabled(wxGLCanvas* canvas) const
+{
+    CanvasesMap::const_iterator it = _get_canvas(canvas);
+    return (it != m_canvases.end()) ? it->second->is_layers_editing_enabled() : false;
+}
+
 void GLCanvas3DManager::zoom_to_bed(wxGLCanvas* canvas)
 {
     CanvasesMap::iterator it = _get_canvas(canvas);
diff --git a/xs/src/slic3r/GUI/GLCanvas3DManager.hpp b/xs/src/slic3r/GUI/GLCanvas3DManager.hpp
index 4877618f00..6abe1bbf72 100644
--- a/xs/src/slic3r/GUI/GLCanvas3DManager.hpp
+++ b/xs/src/slic3r/GUI/GLCanvas3DManager.hpp
@@ -62,6 +62,8 @@ public:
     GLVolumeCollection* get_volumes(wxGLCanvas* canvas);
     void set_volumes(wxGLCanvas* canvas, GLVolumeCollection* volumes);
 
+    void reset_volumes(wxGLCanvas* canvas);
+
     void set_bed_shape(wxGLCanvas* canvas, const Pointfs& shape);
     void set_auto_bed_shape(wxGLCanvas* canvas);
 
@@ -96,6 +98,8 @@ public:
     Pointf3 get_camera_target(wxGLCanvas* canvas) const;
     void set_camera_target(wxGLCanvas* canvas, const Pointf3* target);
 
+    bool is_layers_editing_enabled(wxGLCanvas* canvas) const;
+
     void zoom_to_bed(wxGLCanvas* canvas);
     void zoom_to_volumes(wxGLCanvas* canvas);
     void select_view(wxGLCanvas* canvas, const std::string& direction);
diff --git a/xs/xsp/GUI_3DScene.xsp b/xs/xsp/GUI_3DScene.xsp
index 55679ba16b..c55ee8fbdc 100644
--- a/xs/xsp/GUI_3DScene.xsp
+++ b/xs/xsp/GUI_3DScene.xsp
@@ -207,6 +207,12 @@ set_volumes(canvas, volumes)
         GLVolumeCollection *volumes;
     CODE:
         _3DScene::set_volumes((wxGLCanvas*)wxPli_sv_2_object(aTHX_ canvas, "Wx::GLCanvas"), volumes);
+
+void
+reset_volumes(canvas)
+        SV *canvas;
+    CODE:
+        _3DScene::reset_volumes((wxGLCanvas*)wxPli_sv_2_object(aTHX_ canvas, "Wx::GLCanvas"));
         
 void
 set_bed_shape(canvas, shape)