diff --git a/lib/Slic3r/GUI/Plater.pm b/lib/Slic3r/GUI/Plater.pm
index 7bfdadd0e..c4c7224fb 100644
--- a/lib/Slic3r/GUI/Plater.pm
+++ b/lib/Slic3r/GUI/Plater.pm
@@ -296,20 +296,17 @@ sub new {
             }
         });
 
-#======================================================================================================================================
         Slic3r::GUI::_3DScene::register_on_viewport_changed_callback($self->{canvas3D},
         sub {
             $self->{preview_iface}->set_viewport_from_scene($self->{canvas3D});
         });
 #        Slic3r::GUI::_3DScene::register_on_viewport_changed_callback($self->{canvas3D}, sub { Slic3r::GUI::_3DScene::set_viewport_from_scene($self->{preview3D}->canvas, $self->{canvas3D}); });
-#======================================================================================================================================
     }
 
     Slic3r::GUI::register_on_request_update_callback(sub { $self->schedule_background_process; });
     
     # Initialize 3D toolpaths preview
     if ($Slic3r::GUI::have_OpenGL) {
-#======================================================================================================================================
         $self->{preview_iface} = Slic3r::GUI::create_preview_iface($self->{preview_notebook}, $self->{config}, $self->{print}, $self->{gcode_preview_data});
         $self->{preview_page_idx} = $self->{preview_notebook}->GetPageCount-1;        
         $self->{preview_iface}->register_on_viewport_changed_callback(sub { $self->{preview_iface}->set_viewport_into_scene($self->{canvas3D}); });
@@ -318,19 +315,15 @@ sub new {
 #        Slic3r::GUI::_3DScene::enable_dynamic_background($self->{preview3D}->canvas, 1);
 #        Slic3r::GUI::_3DScene::register_on_viewport_changed_callback($self->{preview3D}->canvas, sub { Slic3r::GUI::_3DScene::set_viewport_from_scene($self->{canvas3D}, $self->{preview3D}->canvas); });
 #        $self->{preview_notebook}->AddPage($self->{preview3D}, L('Preview'));
-#======================================================================================================================================        
         $self->{preview3D_page_idx} = $self->{preview_notebook}->GetPageCount-1;
     }
     
     EVT_NOTEBOOK_PAGE_CHANGED($self, $self->{preview_notebook}, sub {
         my $preview = $self->{preview_notebook}->GetCurrentPage;
-#======================================================================================================================================
         my $page_id = $self->{preview_notebook}->GetSelection;
         if (($preview != $self->{canvas3D}) && ($page_id != $self->{preview_page_idx})) {
 #        if (($preview != $self->{preview3D}) && ($preview != $self->{canvas3D})) {
-#======================================================================================================================================
             $preview->OnActivate if $preview->can('OnActivate');        
-#======================================================================================================================================
         } elsif ($page_id == $self->{preview_page_idx}) {
             $self->{preview_iface}->reload_print;
             # sets the canvas as dirty to force a render at the 1st idle event (wxWidgets IsShownOnScreen() is buggy and cannot be used reliably)
@@ -339,7 +332,6 @@ sub new {
 #            $self->{preview3D}->reload_print;
 #            # sets the canvas as dirty to force a render at the 1st idle event (wxWidgets IsShownOnScreen() is buggy and cannot be used reliably)
 #            Slic3r::GUI::_3DScene::set_as_dirty($self->{preview3D}->canvas);
-#======================================================================================================================================
         } elsif ($preview == $self->{canvas3D}) {
             if (Slic3r::GUI::_3DScene::is_reload_delayed($self->{canvas3D})) {
                 my $selections = $self->collect_selections;
@@ -482,10 +474,8 @@ sub new {
     
     $_->SetDropTarget(Slic3r::GUI::Plater::DropTarget->new($self))
         for grep defined($_),
-#======================================================================================================================================
             $self, $self->{canvas3D}, $self->{preview_iface}, $self->{list};
 #            $self, $self->{canvas3D}, $self->{preview3D}, $self->{list};
-#======================================================================================================================================
 #            $self, $self->{canvas}, $self->{canvas3D}, $self->{preview3D};
     
     EVT_COMMAND($self, -1, $SLICING_COMPLETED_EVENT, sub {
@@ -512,12 +502,10 @@ sub new {
         Slic3r::GUI::_3DScene::set_bed_shape($self->{canvas3D}, $self->{config}->bed_shape);
         Slic3r::GUI::_3DScene::zoom_to_bed($self->{canvas3D});
     }
-#======================================================================================================================================
     $self->{preview_iface}->set_bed_shape($self->{config}->bed_shape) if ($self->{preview_iface});
 #    if ($self->{preview3D}) {
 #        Slic3r::GUI::_3DScene::set_bed_shape($self->{preview3D}->canvas, $self->{config}->bed_shape);
 #    }
-#======================================================================================================================================
     $self->update;
     
     {
@@ -1032,10 +1020,8 @@ sub remove {
     $self->stop_background_process;
     
     # Prevent toolpaths preview from rendering while we modify the Print object
-#======================================================================================================================================
     $self->{preview_iface}->set_enabled(0) if $self->{preview_iface};
 #    $self->{preview3D}->enabled(0) if $self->{preview3D};
-#======================================================================================================================================
     
     # If no object index is supplied, remove the selected one.
     if (! defined $obj_idx) {
@@ -1060,10 +1046,8 @@ sub reset {
     $self->stop_background_process;
     
     # Prevent toolpaths preview from rendering while we modify the Print object
-#======================================================================================================================================
     $self->{preview_iface}->set_enabled(0) if $self->{preview_iface};
 #    $self->{preview3D}->enabled(0) if $self->{preview3D};
-#======================================================================================================================================
     
     @{$self->{objects}} = ();
     $self->{model}->clear_objects;
@@ -1424,10 +1408,8 @@ sub async_apply_config {
             # Reset preview canvases. If the print has been invalidated, the preview canvases will be cleared.
             # Otherwise they will be just refreshed.
             $self->{gcode_preview_data}->reset;
-#======================================================================================================================================
             $self->{preview_iface}->reload_print if $self->{preview_iface};
 #            $self->{preview3D}->reload_print if $self->{preview3D};
-#======================================================================================================================================
             # We also need to reload 3D scene because of the wipe tower preview box
             if ($self->{config}->wipe_tower) {
                 my $selections = $self->collect_selections;
@@ -1462,10 +1444,8 @@ sub start_background_process {
 sub stop_background_process {
     my ($self) = @_;
     $self->{background_slicing_process}->stop();
-#======================================================================================================================================
     $self->{preview_iface}->reload_print if $self->{preview_iface};
 #    $self->{preview3D}->reload_print if $self->{preview3D};
-#======================================================================================================================================
 }
 
 # Called by the "Slice now" button, which is visible only if the background processing is disabled.
@@ -1571,10 +1551,8 @@ sub export_gcode {
 # This message should be called by the background process synchronously.
 sub on_update_print_preview {
     my ($self) = @_;
-#======================================================================================================================================
     $self->{preview_iface}->reload_print if $self->{preview_iface};
 #    $self->{preview3D}->reload_print if $self->{preview3D};
-#======================================================================================================================================
 
     # in case this was MM print, wipe tower bounding box on 3D tab might need redrawing with exact depth:
     my $selections = $self->collect_selections;
@@ -1655,10 +1633,8 @@ sub on_process_completed {
     $self->object_list_changed;
     
     # refresh preview
-#======================================================================================================================================
     $self->{preview_iface}->reload_print if $self->{preview_iface};
 #    $self->{preview3D}->reload_print if $self->{preview3D};
-#======================================================================================================================================
 }
 
 # Fill in the "Sliced info" box with the result of the G-code generator.
@@ -1926,12 +1902,10 @@ sub update {
     my $selections = $self->collect_selections;
     Slic3r::GUI::_3DScene::set_objects_selections($self->{canvas3D}, \@$selections);
     Slic3r::GUI::_3DScene::reload_scene($self->{canvas3D}, 0);
-#======================================================================================================================================
     $self->{preview_iface}->reset_gcode_preview_data if $self->{preview_iface};
     $self->{preview_iface}->reload_print if $self->{preview_iface};
 #    $self->{preview3D}->reset_gcode_preview_data if $self->{preview3D};
 #    $self->{preview3D}->reload_print if $self->{preview3D};
-#======================================================================================================================================
     $self->schedule_background_process;
     $self->Thaw;
 }
@@ -2007,10 +1981,8 @@ sub on_config_change {
         if ($opt_key eq 'bed_shape') {
 #            $self->{canvas}->update_bed_size;
             Slic3r::GUI::_3DScene::set_bed_shape($self->{canvas3D}, $self->{config}->bed_shape) if $self->{canvas3D};
-#======================================================================================================================================
             $self->{preview_iface}->set_bed_shape($self->{config}->bed_shape) if ($self->{preview_iface});
 #            Slic3r::GUI::_3DScene::set_bed_shape($self->{preview3D}->canvas, $self->{config}->bed_shape) if $self->{preview3D};
-#======================================================================================================================================
             $update_scheduled = 1;
         } elsif ($opt_key =~ '^wipe_tower' || $opt_key eq 'single_extruder_multi_material') {
             $update_scheduled = 1;
@@ -2045,19 +2017,15 @@ sub on_config_change {
         } elsif ($opt_key eq 'extruder_colour') {
             $update_scheduled = 1;
             my $extruder_colors = $config->get('extruder_colour');
-#======================================================================================================================================
             $self->{preview_iface}->set_number_extruders(scalar(@{$extruder_colors}));
 #            $self->{preview3D}->set_number_extruders(scalar(@{$extruder_colors}));
-#======================================================================================================================================
         } elsif ($opt_key eq 'max_print_height') {
             $update_scheduled = 1;
         } elsif ($opt_key eq 'printer_model') {
             # update to force bed selection (for texturing)
             Slic3r::GUI::_3DScene::set_bed_shape($self->{canvas3D}, $self->{config}->bed_shape) if $self->{canvas3D};
-#======================================================================================================================================
             $self->{preview_iface}->set_bed_shape($self->{config}->bed_shape) if ($self->{preview_iface});
 #            Slic3r::GUI::_3DScene::set_bed_shape($self->{preview3D}->canvas, $self->{config}->bed_shape) if $self->{preview3D};
-#======================================================================================================================================
             $update_scheduled = 1;
         }
     }
@@ -2509,18 +2477,14 @@ sub select_view {
     my $idx_page = $self->{preview_notebook}->GetSelection;
     my $page = ($idx_page == &Wx::wxNOT_FOUND) ? L('3D') : $self->{preview_notebook}->GetPageText($idx_page);
     if ($page eq L('Preview')) {
-#======================================================================================================================================
         $self->{preview_iface}->select_view($direction);
         $self->{preview_iface}->set_viewport_into_scene($self->{canvas3D});
 #        Slic3r::GUI::_3DScene::select_view($self->{preview3D}->canvas, $direction);
 #        Slic3r::GUI::_3DScene::set_viewport_from_scene($self->{canvas3D}, $self->{preview3D}->canvas);
-#======================================================================================================================================            
     } else {
         Slic3r::GUI::_3DScene::select_view($self->{canvas3D}, $direction);
-#======================================================================================================================================            
         $self->{preview_iface}->set_viewport_from_scene($self->{canvas3D});
 #        Slic3r::GUI::_3DScene::set_viewport_from_scene($self->{preview3D}->canvas, $self->{canvas3D});
-#======================================================================================================================================            
     }
 }
 
diff --git a/xs/src/slic3r/GUI/GUI.cpp b/xs/src/slic3r/GUI/GUI.cpp
index b3b52e0c6..24d459921 100644
--- a/xs/src/slic3r/GUI/GUI.cpp
+++ b/xs/src/slic3r/GUI/GUI.cpp
@@ -46,10 +46,8 @@
 
 #include "Tab.hpp"
 #include "TabIface.hpp"
-//##############################################################################################################################################################
 #include "GUI_Preview.hpp"
 #include "GUI_PreviewIface.hpp"
-//##############################################################################################################################################################
 #include "AboutDialog.hpp"
 #include "AppConfig.hpp"
 #include "ConfigSnapshotDialog.hpp"
@@ -152,9 +150,7 @@ wxStaticBitmap	*g_manifold_warning_icon = nullptr;
 bool		g_show_print_info = false;
 bool		g_show_manifold_warning_icon = false;
 
-//##############################################################################################################################################################
-PreviewIface* g_preview = nullptr; // <<< FIXME ENRICO -> add code to delete the pointer when the application closes
-//##############################################################################################################################################################
+PreviewIface* g_preview = nullptr; 
 
 static void init_label_colours()
 {
@@ -673,7 +669,6 @@ TabIface* get_preset_tab_iface(char *name)
 	return new TabIface(nullptr);
 }
 
-//##############################################################################################################################################################
 PreviewIface* create_preview_iface(wxNotebook* parent, DynamicPrintConfig* config, Print* print, GCodePreviewData* gcode_preview_data)
 {
     if (g_preview == nullptr)
@@ -684,7 +679,6 @@ PreviewIface* create_preview_iface(wxNotebook* parent, DynamicPrintConfig* confi
 
     return g_preview;
 }
-//##############################################################################################################################################################
 
 // opt_index = 0, by the reason of zero-index in ConfigOptionVector by default (in case only one element)
 void change_opt_value(DynamicPrintConfig& config, const t_config_option_key& opt_key, const boost::any& value, int opt_index /*= 0*/)
diff --git a/xs/src/slic3r/GUI/GUI.hpp b/xs/src/slic3r/GUI/GUI.hpp
index a5fb4d44d..8dfaf42c6 100644
--- a/xs/src/slic3r/GUI/GUI.hpp
+++ b/xs/src/slic3r/GUI/GUI.hpp
@@ -39,11 +39,9 @@ class AppConfig;
 class PresetUpdater;
 class DynamicPrintConfig;
 class TabIface;
-//##############################################################################################################################################################
 class PreviewIface;
 class Print;
 class GCodePreviewData;
-//##############################################################################################################################################################
 
 #define _(s)    Slic3r::GUI::I18N::translate((s))
 
@@ -170,9 +168,7 @@ extern void open_preferences_dialog(int event_preferences);
 void create_preset_tabs(int event_value_change, int event_presets_changed);
 TabIface* get_preset_tab_iface(char *name);
 
-//##############################################################################################################################################################
 PreviewIface* create_preview_iface(wxNotebook* notebook, DynamicPrintConfig* config, Print* print, GCodePreviewData* gcode_preview_data);
-//##############################################################################################################################################################
 
 // add it at the end of the tab panel.
 void add_created_tab(Tab* panel, int event_value_change, int event_presets_changed);
diff --git a/xs/src/slic3r/GUI/GUI_Preview.cpp b/xs/src/slic3r/GUI/GUI_Preview.cpp
index 52d20e18a..50d404e78 100644
--- a/xs/src/slic3r/GUI/GUI_Preview.cpp
+++ b/xs/src/slic3r/GUI/GUI_Preview.cpp
@@ -57,14 +57,15 @@ bool Preview::init(wxNotebook* notebook, DynamicPrintConfig* config, Print* prin
     if (!Create(notebook, wxID_ANY, wxDefaultPosition, wxDefaultSize))
         return false;
 
-    int attribList[] = { WX_GL_RGBA, WX_GL_DOUBLEBUFFER, WX_GL_DEPTH_SIZE, 24, WX_GL_SAMPLE_BUFFERS, 1, WX_GL_SAMPLES, 4, 0 };
+    int attribList[] = { WX_GL_RGBA, WX_GL_DOUBLEBUFFER, WX_GL_DEPTH_SIZE, 24, WX_GL_SAMPLE_BUFFERS, GL_TRUE, WX_GL_SAMPLES, 4, 0 };
 
     int wxVersion = wxMAJOR_VERSION * 10000 + wxMINOR_VERSION * 100 + wxRELEASE_NUMBER;
     const AppConfig* app_config = GUI::get_app_config();
     bool enable_multisample = (app_config != nullptr) && (app_config->get("use_legacy_opengl") != "1") && (wxVersion >= 30003);
 
     // if multisample is not enabled or supported by the graphic card, remove it from the attributes list
-    bool can_multisample = enable_multisample && wxGLCanvas::IsDisplaySupported(attribList); // <<< FIXME ENRICO IsDisplaySupported() seems not to work
+    bool can_multisample = enable_multisample && wxGLCanvas::IsExtensionSupported("WGL_ARB_multisample");
+//    bool can_multisample = enable_multisample && wxGLCanvas::IsDisplaySupported(attribList); // <<< Alternative method: but IsDisplaySupported() seems not to work
     if (!can_multisample)
         attribList[4] = 0;