diff --git a/lib/Slic3r/GUI.pm b/lib/Slic3r/GUI.pm
index 9fcb85dc6c..52b28cd263 100644
--- a/lib/Slic3r/GUI.pm
+++ b/lib/Slic3r/GUI.pm
@@ -15,6 +15,7 @@ use Slic3r::GUI::Plater;
 use Slic3r::GUI::Plater::2D;
 use Slic3r::GUI::Plater::2DToolpaths;
 use Slic3r::GUI::Plater::3D;
+use Slic3r::GUI::Plater::3DPreview;
 use Slic3r::GUI::Plater::ObjectPartsPanel;
 use Slic3r::GUI::Plater::ObjectCutDialog;
 use Slic3r::GUI::Plater::ObjectSettingsDialog;
diff --git a/lib/Slic3r/GUI/3DScene.pm b/lib/Slic3r/GUI/3DScene.pm
index 6b6c121af6..ecfc3434db 100644
--- a/lib/Slic3r/GUI/3DScene.pm
+++ b/lib/Slic3r/GUI/3DScene.pm
@@ -1069,8 +1069,12 @@ sub load_print_object_toolpaths {
     
     my $obb = $object->bounding_box;
     my $bb = Slic3r::Geometry::BoundingBoxf3->new;
-    $bb->merge_point(Slic3r::Pointf3->new_unscale(@{$obb->min_point}, 0));
-    $bb->merge_point(Slic3r::Pointf3->new_unscale(@{$obb->max_point}, $object->size->z));
+    foreach my $copy (@{ $object->_shifted_copies }) {
+        my $cbb = $obb->clone;
+        $cbb->translate(@$copy);
+        $bb->merge_point(Slic3r::Pointf3->new_unscale(@{$cbb->min_point}, 0));
+        $bb->merge_point(Slic3r::Pointf3->new_unscale(@{$cbb->max_point}, $object->size->z));
+    }
     
     push @{$self->volumes}, Slic3r::GUI::3DScene::Volume->new(
         bounding_box    => $bb,
diff --git a/lib/Slic3r/GUI/Plater.pm b/lib/Slic3r/GUI/Plater.pm
index 8d7b62b439..199a83b05b 100644
--- a/lib/Slic3r/GUI/Plater.pm
+++ b/lib/Slic3r/GUI/Plater.pm
@@ -11,7 +11,7 @@ use Wx qw(:button :cursor :dialog :filedialog :keycode :icon :font :id :listctrl
     :panel :sizer :toolbar :window wxTheApp :notebook);
 use Wx::Event qw(EVT_BUTTON EVT_COMMAND EVT_KEY_DOWN EVT_LIST_ITEM_ACTIVATED 
     EVT_LIST_ITEM_DESELECTED EVT_LIST_ITEM_SELECTED EVT_MOUSE_EVENTS EVT_PAINT EVT_TOOL 
-    EVT_CHOICE EVT_TIMER);
+    EVT_CHOICE EVT_TIMER EVT_NOTEBOOK_PAGE_CHANGED);
 use base 'Wx::Panel';
 
 use constant TB_ADD             => &Wx::NewId;
@@ -91,7 +91,7 @@ sub new {
         $self->update;
     };
     
-    # Initialize 3D preview
+    # Initialize 3D plater
     if ($Slic3r::GUI::have_OpenGL) {
         $self->{canvas3D} = Slic3r::GUI::Plater::3D->new($self->{preview_notebook}, $self->{objects}, $self->{model}, $self->{config});
         $self->{preview_notebook}->AddPage($self->{canvas3D}, '3D');
@@ -112,9 +112,22 @@ sub new {
     # Initialize toolpaths preview
     if ($Slic3r::GUI::have_OpenGL) {
         $self->{toolpaths2D} = Slic3r::GUI::Plater::2DToolpaths->new($self->{preview_notebook}, $self->{print});
-        $self->{preview_notebook}->AddPage($self->{toolpaths2D}, 'Preview');
+        $self->{preview_notebook}->AddPage($self->{toolpaths2D}, 'Preview 2D');
     }
     
+    # Initialize 3D plater
+    if ($Slic3r::GUI::have_OpenGL) {
+        $self->{preview3D} = Slic3r::GUI::Plater::3DPreview->new($self->{preview_notebook}, $self->{print});
+        $self->{preview_notebook}->AddPage($self->{preview3D}, 'Preview 3D');
+        $self->{preview3D_page_idx} = $self->{preview_notebook}->GetPageCount-1;
+    }
+    
+    EVT_NOTEBOOK_PAGE_CHANGED($self, $self->{preview_notebook}, sub {
+        if ($self->{preview_notebook}->GetSelection == $self->{preview3D_page_idx}) {
+            $self->{preview3D}->reload_print;
+        }
+    });
+    
     # toolbar for object manipulation
     if (!&Wx::wxMSW) {
         Wx::ToolTip::Enable(1);
@@ -245,7 +258,8 @@ sub new {
     }
     
     $_->SetDropTarget(Slic3r::GUI::Plater::DropTarget->new($self))
-        for grep defined($_), $self, $self->{canvas}, $self->{canvas3D}, $self->{list};
+        for grep defined($_),
+            $self, $self->{canvas}, $self->{canvas3D}, $self->{preview3D}, $self->{list};
     
     EVT_COMMAND($self, -1, $THUMBNAIL_DONE_EVENT, sub {
         my ($self, $event) = @_;
@@ -287,6 +301,9 @@ sub new {
         $self->{canvas3D}->update_bed_size;
         $self->{canvas3D}->zoom_to_bed;
     }
+    if ($self->{preview3D}) {
+        $self->{preview3D}->set_bed_shape($self->{config}->bed_shape);
+    }
     $self->update;
     
     {
@@ -543,6 +560,7 @@ sub remove {
     
     # Prevent toolpaths preview from rendering while we modify the Print object
     $self->{toolpaths2D}->enabled(0) if $self->{toolpaths2D};
+    $self->{preview3D}->enabled(0) if $self->{preview3D};
     
     # if no object index is supplied, remove the selected one
     if (!defined $obj_idx) {
@@ -567,6 +585,7 @@ sub reset {
     
     # Prevent toolpaths preview from rendering while we modify the Print object
     $self->{toolpaths2D}->enabled(0) if $self->{toolpaths2D};
+    $self->{preview3D}->enabled(0) if $self->{preview3D};
     
     @{$self->{objects}} = ();
     $self->{model}->clear_objects;
@@ -855,6 +874,7 @@ sub schedule_background_process {
     if (defined $self->{apply_config_timer}) {
         $self->{apply_config_timer}->Start(PROCESS_DELAY, 1);  # 1 = one shot
         $self->{toolpaths2D}->reload_print;
+        $self->{preview3D}->reload_print;
     }
 }
 
@@ -934,6 +954,7 @@ sub stop_background_process {
     $self->statusbar->StopBusy;
     $self->statusbar->SetStatusText("");
     $self->{toolpaths2D}->reload_print;
+    $self->{preview3D}->reload_print;
     
     if ($self->{process_thread}) {
         Slic3r::debugf "Killing background process.\n";
@@ -1058,6 +1079,7 @@ sub on_process_completed {
     
     return if $error;
     $self->{toolpaths2D}->reload_print;
+    $self->{preview3D}->reload_print;
     
     # if we have an export filename, start a new thread for exporting G-code
     if ($self->{export_gcode_output_file}) {
@@ -1516,6 +1538,7 @@ sub refresh_canvases {
     
     $self->{canvas}->Refresh;
     $self->{canvas3D}->update if $self->{canvas3D};
+    $self->{preview3D}->reload_print if $self->{preview3D};
 }
 
 sub validate_config {
diff --git a/lib/Slic3r/GUI/Plater/3DPreview.pm b/lib/Slic3r/GUI/Plater/3DPreview.pm
new file mode 100644
index 0000000000..d0fb9323dc
--- /dev/null
+++ b/lib/Slic3r/GUI/Plater/3DPreview.pm
@@ -0,0 +1,112 @@
+package Slic3r::GUI::Plater::3DPreview;
+use strict;
+use warnings;
+use utf8;
+
+use Slic3r::Print::State ':steps';
+use Wx qw(:misc :sizer :slider :statictext wxWHITE);
+use Wx::Event qw(EVT_SLIDER EVT_KEY_DOWN);
+use base qw(Wx::Panel Class::Accessor);
+
+__PACKAGE__->mk_accessors(qw(print enabled canvas slider));
+
+sub new {
+    my $class = shift;
+    my ($parent, $print) = @_;
+    
+    my $self = $class->SUPER::new($parent, -1, wxDefaultPosition);
+    
+    # init GUI elements
+    my $canvas = Slic3r::GUI::3DScene->new($self);
+    $self->canvas($canvas);
+    my $slider = Wx::Slider->new(
+        $self, -1,
+        0,                              # default
+        0,                              # min
+        # we set max to a bogus non-zero value because the MSW implementation of wxSlider
+        # will skip drawing the slider if max <= min:
+        1,                              # max
+        wxDefaultPosition,
+        wxDefaultSize,
+        wxVERTICAL | wxSL_INVERSE,
+    );
+    $self->slider($slider);
+    
+    my $z_label = $self->{z_label} = Wx::StaticText->new($self, -1, "", wxDefaultPosition,
+        [40,-1], wxALIGN_CENTRE_HORIZONTAL);
+    $z_label->SetFont($Slic3r::GUI::small_font);
+    
+    my $vsizer = Wx::BoxSizer->new(wxVERTICAL);
+    $vsizer->Add($slider, 1, wxALL | wxEXPAND | wxALIGN_CENTER, 3);
+    $vsizer->Add($z_label, 0, wxALL | wxEXPAND | wxALIGN_CENTER, 3);
+    
+    my $sizer = Wx::BoxSizer->new(wxHORIZONTAL);
+    $sizer->Add($canvas, 1, wxALL | wxEXPAND, 0);
+    $sizer->Add($vsizer, 0, wxTOP | wxBOTTOM | wxEXPAND, 5);
+    
+    EVT_SLIDER($self, $slider, sub {
+        $self->set_z($self->{layers_z}[$slider->GetValue])
+            if $self->enabled;
+    });
+    
+    $self->SetSizer($sizer);
+    $self->SetMinSize($self->GetSize);
+    $sizer->SetSizeHints($self);
+    
+    # init canvas
+    $canvas->set_bed_shape($print->config->bed_shape);
+    $self->print($print);
+    $self->reload_print;
+    
+    return $self;
+}
+
+sub reload_print {
+    my ($self) = @_;
+    
+    $self->canvas->reset_objects;
+    
+    # we require that there's at least one object and the posSlice step
+    # is performed on all of them (this ensures that _shifted_copies was
+    # populated and we know the number of layers)
+    if (!$self->print->object_step_done(STEP_SLICE)) {
+        $self->enabled(0);
+        $self->slider->Hide;
+        $self->canvas->Refresh;  # clears canvas
+        return;
+    }
+    
+    if (0) {
+        my %z = ();  # z => 1
+        foreach my $object (@{$self->{print}->objects}) {
+            foreach my $layer (@{$object->layers}, @{$object->support_layers}) {
+                $z{$layer->print_z} = 1;
+            }
+        }
+        $self->enabled(1);
+        $self->{layers_z} = [ sort { $a <=> $b } keys %z ];
+        $self->{slider}->SetRange(0, scalar(@{$self->{layers_z}})-1);
+        if ((my $z_idx = $self->{slider}->GetValue) <= $#{$self->{layers_z}}) {
+            $self->set_z($self->{layers_z}[$z_idx]);
+        } else {
+            $self->{slider}->SetValue(0);
+            $self->set_z($self->{layers_z}[0]) if @{$self->{layers_z}};
+        }
+        $self->{slider}->Show;
+        $self->Layout;
+    }
+    
+    if ($self->IsShown) {
+        foreach my $object (@{$self->print->objects}) {
+            $self->canvas->load_print_object_toolpaths($object);
+        }
+        $self->canvas->zoom_to_volumes;
+    }
+}
+
+sub set_bed_shape {
+    my ($self, $bed_shape) = @_;
+    $self->canvas->set_bed_shape($bed_shape);
+}
+
+1;