diff --git a/src/slic3r/GUI/GUI_App.cpp b/src/slic3r/GUI/GUI_App.cpp
index a5f5656e70..830c551155 100644
--- a/src/slic3r/GUI/GUI_App.cpp
+++ b/src/slic3r/GUI/GUI_App.cpp
@@ -995,7 +995,12 @@ void GUI_App::post_init()
             }
         }
     }
-#if BBL_HAS_FIRST_PAGE
+//#if BBL_HAS_FIRST_PAGE
+    bool slow_bootup = false;
+    if (app_config->get("slow_bootup") == "true") {
+        slow_bootup = true;
+        BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << ", slow bootup, won't render gl here.";
+    }
     if (!switch_to_3d) {
         BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << ", begin load_gl_resources";
         mainframe->Freeze();
@@ -1016,17 +1021,19 @@ void GUI_App::post_init()
 
         BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << ", finished init imgui frame";
         plater_->canvas3D()->enable_render(true);
-        BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << ", start to render a first frame for test";
 
-        plater_->canvas3D()->render(false);
-        BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << ", finished rendering a first frame for test";
+        if (!slow_bootup) {
+            BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << ", start to render a first frame for test";
+            plater_->canvas3D()->render(false);
+            BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << ", finished rendering a first frame for test";
+        }
         if (is_editor())
             mainframe->select_tab(size_t(0));
         mainframe->Thaw();
         plater_->trigger_restore_project(1);
         BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << ", end load_gl_resources";
     }
-#endif
+//#endif
 
     //BBS: remove GCodeViewer as seperate APP logic
     /*if (this->init_params->start_as_gcodeviewer) {
@@ -2342,7 +2349,7 @@ bool GUI_App::on_init_inner()
     mainframe->Show(true);
     BOOST_LOG_TRIVIAL(info) << "main frame firstly shown";
 
-#if BBL_HAS_FIRST_PAGE
+//#if BBL_HAS_FIRST_PAGE
     //BBS: set tp3DEditor firstly
     /*plater_->canvas3D()->enable_render(false);
     mainframe->select_tab(size_t(MainFrame::tp3DEditor));
@@ -2358,9 +2365,9 @@ bool GUI_App::on_init_inner()
     plater_->canvas3D()->render();
     if (is_editor())
         mainframe->select_tab(size_t(0));*/
-#else
-    plater_->trigger_restore_project(1);
-#endif
+//#else
+    //plater_->trigger_restore_project(1);
+//#endif
 
     obj_list()->set_min_height();
 
diff --git a/src/slic3r/GUI/GUI_App.hpp b/src/slic3r/GUI/GUI_App.hpp
index d26620ef62..c5dbc54c39 100644
--- a/src/slic3r/GUI/GUI_App.hpp
+++ b/src/slic3r/GUI/GUI_App.hpp
@@ -25,7 +25,7 @@
 #include <mutex>
 #include <stack>
 
-#define BBL_HAS_FIRST_PAGE          1
+//#define BBL_HAS_FIRST_PAGE          1
 #define STUDIO_INACTIVE_TIMEOUT     15*60*1000
 #define LOG_FILES_MAX_NUM           30
 #define TIMEOUT_CONNECT             15
diff --git a/src/slic3r/GUI/Plater.cpp b/src/slic3r/GUI/Plater.cpp
index 12fcf1ebee..fbed9cfba5 100644
--- a/src/slic3r/GUI/Plater.cpp
+++ b/src/slic3r/GUI/Plater.cpp
@@ -5036,7 +5036,7 @@ void Plater::priv::set_current_panel(wxPanel* panel, bool no_slice)
     }
 
     wxPanel* old_panel = current_panel;
-#if BBL_HAS_FIRST_PAGE
+//#if BBL_HAS_FIRST_PAGE
     if (!old_panel) {
         //BBS: only switch to the first panel when visible
         panel->Show();
@@ -5044,7 +5044,7 @@ void Plater::priv::set_current_panel(wxPanel* panel, bool no_slice)
         if (!panel->IsShownOnScreen())
             return;
     }
-#endif
+//#endif
     current_panel = panel;
     //BBS: add the collapse logic
     if (current_panel == preview && q->only_gcode_mode()) {