diff --git a/src/slic3r/GUI/GLCanvas3D.cpp b/src/slic3r/GUI/GLCanvas3D.cpp
index e778de8794..c2e4424313 100644
--- a/src/slic3r/GUI/GLCanvas3D.cpp
+++ b/src/slic3r/GUI/GLCanvas3D.cpp
@@ -86,6 +86,13 @@ static const size_t VERTEX_BUFFER_RESERVE_SIZE_SUM_MAX = 1024 * 1024 * 128 / 4;
 namespace Slic3r {
 namespace GUI {
 
+#ifdef __WXGTK3__
+// wxGTK3 seems to simulate OSX behavior in regard to HiDPI scaling support.
+RetinaHelper::RetinaHelper(wxWindow* window) : m_window(window), m_self(nullptr) {}
+RetinaHelper::~RetinaHelper() {}
+float RetinaHelper::get_scale_factor() { return float(m_window->GetContentScaleFactor()); }
+#endif // __WXGTK3__
+
 Size::Size()
     : m_width(0)
     , m_height(0)
@@ -3732,7 +3739,8 @@ void GLCanvas3D::update_ui_from_settings()
 {
     m_dirty = true;
 
-#if ENABLE_RETINA_GL
+#if __APPLE__
+    // Update OpenGL scaling on OSX after the user toggled the "use_retina_opengl" settings in Preferences dialog.
     const float orig_scaling = m_retina_helper->get_scale_factor();
 
     const bool use_retina = wxGetApp().app_config->get("use_retina_opengl") == "1";
diff --git a/src/slic3r/GUI/GLCanvas3D.hpp b/src/slic3r/GUI/GLCanvas3D.hpp
index 9c80aa2369..e64e65d1b3 100644
--- a/src/slic3r/GUI/GLCanvas3D.hpp
+++ b/src/slic3r/GUI/GLCanvas3D.hpp
@@ -31,8 +31,9 @@ class wxPaintEvent;
 class wxGLCanvas;
 class wxGLContext;
 
-// Support for Retina OpenGL on Mac OS
-#define ENABLE_RETINA_GL __APPLE__
+// Support for Retina OpenGL on Mac OS.
+// wxGTK3 seems to simulate OSX behavior in regard to HiDPI scaling support, enable it as well.
+#define ENABLE_RETINA_GL (__APPLE__ || __WXGTK3__)
 
 namespace Slic3r {
 
diff --git a/src/slic3r/GUI/ImGuiWrapper.cpp b/src/slic3r/GUI/ImGuiWrapper.cpp
index 3d96967ec8..ff8ba8f48a 100644
--- a/src/slic3r/GUI/ImGuiWrapper.cpp
+++ b/src/slic3r/GUI/ImGuiWrapper.cpp
@@ -963,6 +963,8 @@ void ImGuiWrapper::init_font(bool compress)
     // Fill rectangles from the SVG-icons
     for (auto icon : font_icons) {
         if (const ImFontAtlas::CustomRect* rect = io.Fonts->GetCustomRectByIndex(rect_id)) {
+            assert(rect->Width == icon_sz);
+            assert(rect->Height == icon_sz);
             std::vector<unsigned char> raw_data = load_svg(icon.second, icon_sz, icon_sz);
             const ImU32* pIn = (ImU32*)raw_data.data();
             for (int y = 0; y < icon_sz; y++) {
@@ -973,10 +975,12 @@ void ImGuiWrapper::init_font(bool compress)
         }
         rect_id++;
     }
-    icon_sz = lround(32 * font_scale); // default size of large icon is 32 px
-    
+
+    icon_sz *= 2; // default size of large icon is 32 px
     for (auto icon : font_icons_large) {
         if (const ImFontAtlas::CustomRect* rect = io.Fonts->GetCustomRectByIndex(rect_id)) {
+            assert(rect->Width == icon_sz);
+            assert(rect->Height == icon_sz);
             std::vector<unsigned char> raw_data = load_svg(icon.second, icon_sz, icon_sz);
             const ImU32* pIn = (ImU32*)raw_data.data();
             for (int y = 0; y < icon_sz; y++) {
diff --git a/src/slic3r/GUI/MainFrame.cpp b/src/slic3r/GUI/MainFrame.cpp
index db4183b407..8e6b1c5ef2 100644
--- a/src/slic3r/GUI/MainFrame.cpp
+++ b/src/slic3r/GUI/MainFrame.cpp
@@ -228,7 +228,8 @@ DPIFrame(NULL, wxID_ANY, "", wxDefaultPosition, wxDefaultSize, wxDEFAULT_FRAME_S
 // OSX specific issue:
 // When we move application between Retina and non-Retina displays, The legend on a canvas doesn't redraw
 // So, redraw explicitly canvas, when application is moved
-#if ENABLE_RETINA_GL
+//FIXME maybe this is useful for __WXGTK3__ as well?
+#if __APPLE__
     Bind(wxEVT_MOVE, [this](wxMoveEvent& event) {
         wxGetApp().plater()->get_current_canvas3D()->set_as_dirty();
         wxGetApp().plater()->get_current_canvas3D()->request_extra_frame();