diff --git a/applications/Mapple/paint_canvas.cpp b/applications/Mapple/paint_canvas.cpp
index 7261917f..c7e59a2d 100644
--- a/applications/Mapple/paint_canvas.cpp
+++ b/applications/Mapple/paint_canvas.cpp
@@ -1878,6 +1878,18 @@ void PaintCanvas::showCoordinatesUnderMouse(bool b) {
 
 
 void PaintCanvas::draw() {
+    // To have split views of different rendering styles for the same object/scene.
+    //glEnable(GL_SCISSOR_TEST);
+    //int scissor[4];
+    //glGetIntegerv(GL_SCISSOR_BOX, scissor);
+    //glScissor(scissor[0], scissor[1], scissor[2] * 0.5f, scissor[3]);
+    //current_model()->renderer()->get_lines_drawable("edges")->set_visible(false);
+    //Viewer::draw();
+    //glScissor(scissor[2] * 0.5f, scissor[1], scissor[2] * 0.5f, scissor[3]);
+    //current_model()->renderer()->get_lines_drawable("edges")->set_visible(true);
+    //Viewer::draw();
+    //glScissor(scissor[0], scissor[1], scissor[2], scissor[3]);
+
     if (models_.empty())
         return;
 
diff --git a/easy3d/viewer/viewer.cpp b/easy3d/viewer/viewer.cpp
index 638f464a..c745390c 100644
--- a/easy3d/viewer/viewer.cpp
+++ b/easy3d/viewer/viewer.cpp
@@ -1729,16 +1729,17 @@ namespace easy3d {
 
 
     void Viewer::draw() const {
-//        glEnable(GL_SCISSOR_TEST);
-//        int scissor[4];
-//        glGetIntegerv(GL_SCISSOR_BOX, scissor);
-//        glScissor(scissor[0], scissor[1], scissor[2] * 0.5f, scissor[3]);
-//        current_model()->renderer()->get_lines_drawable("edges")->set_visible(false);
-//        draw();
-//        glScissor(scissor[2] * 0.5f, scissor[1], scissor[2] * 0.5f, scissor[3]);
-//        current_model()->renderer()->get_lines_drawable("edges")->set_visible(true);
-//        draw();
-//        glScissor(scissor[0], scissor[1], scissor[2], scissor[3]);
+        // To have split views of different rendering styles for the same object/scene.
+        //glEnable(GL_SCISSOR_TEST);
+        //int scissor[4];
+        //glGetIntegerv(GL_SCISSOR_BOX, scissor);
+        //glScissor(scissor[0], scissor[1], scissor[2] * 0.5f, scissor[3]);
+        //current_model()->renderer()->get_lines_drawable("edges")->set_visible(false);
+        //Viewer::draw();
+        //glScissor(scissor[2] * 0.5f, scissor[1], scissor[2] * 0.5f, scissor[3]);
+        //current_model()->renderer()->get_lines_drawable("edges")->set_visible(true);
+        //Viewer::draw();
+        //glScissor(scissor[0], scissor[1], scissor[2], scissor[3]);
 
         for (const auto m : models_) {
             if (!m->renderer()->is_visible())
diff --git a/tutorials/Tutorial_203_Viewer_wxWidgets/viewer.cpp b/tutorials/Tutorial_203_Viewer_wxWidgets/viewer.cpp
index c5752cb5..01986d8c 100644
--- a/tutorials/Tutorial_203_Viewer_wxWidgets/viewer.cpp
+++ b/tutorials/Tutorial_203_Viewer_wxWidgets/viewer.cpp
@@ -789,6 +789,18 @@ namespace easy3d {
 
 
     void Viewer::draw() const {
+        // To have split views of different rendering styles for the same object/scene.
+        //glEnable(GL_SCISSOR_TEST);
+        //int scissor[4];
+        //glGetIntegerv(GL_SCISSOR_BOX, scissor);
+        //glScissor(scissor[0], scissor[1], scissor[2] * 0.5f, scissor[3]);
+        //current_model()->renderer()->get_lines_drawable("edges")->set_visible(false);
+        //Viewer::draw();
+        //glScissor(scissor[2] * 0.5f, scissor[1], scissor[2] * 0.5f, scissor[3]);
+        //current_model()->renderer()->get_lines_drawable("edges")->set_visible(true);
+        //Viewer::draw();
+        //glScissor(scissor[0], scissor[1], scissor[2], scissor[3]);
+
         for (const auto m : models_) {
             if (!m->renderer()->is_visible())
                 continue;
diff --git a/tutorials/Tutorial_204_Viewer_Qt/viewer.cpp b/tutorials/Tutorial_204_Viewer_Qt/viewer.cpp
index 939afffc..c8305241 100644
--- a/tutorials/Tutorial_204_Viewer_Qt/viewer.cpp
+++ b/tutorials/Tutorial_204_Viewer_Qt/viewer.cpp
@@ -984,6 +984,18 @@ namespace easy3d {
 
 
     void Viewer::draw() {
+        // To have split views of different rendering styles for the same object/scene.
+        //glEnable(GL_SCISSOR_TEST);
+        //int scissor[4];
+        //glGetIntegerv(GL_SCISSOR_BOX, scissor);
+        //glScissor(scissor[0], scissor[1], scissor[2] * 0.5f, scissor[3]);
+        //current_model()->renderer()->get_lines_drawable("edges")->set_visible(false);
+        //Viewer::draw();
+        //glScissor(scissor[2] * 0.5f, scissor[1], scissor[2] * 0.5f, scissor[3]);
+        //current_model()->renderer()->get_lines_drawable("edges")->set_visible(true);
+        //Viewer::draw();
+        //glScissor(scissor[0], scissor[1], scissor[2], scissor[3]);
+
         easy3d_debug_log_gl_error
 
         for (const auto m: models_) {
diff --git a/tutorials/Tutorial_307_CrossSection/CMakeLists.txt b/tutorials/Tutorial_307_CrossSection/CMakeLists.txt
index ddb716c6..7380da95 100644
--- a/tutorials/Tutorial_307_CrossSection/CMakeLists.txt
+++ b/tutorials/Tutorial_307_CrossSection/CMakeLists.txt
@@ -1,5 +1,5 @@
 get_filename_component(example ${CMAKE_CURRENT_SOURCE_DIR} NAME)
-set(dependencies 3rd_imgui easy3d::core easy3d::renderer easy3d::viewer easy3d::util)
+set(dependencies easy3d::core easy3d::renderer easy3d::viewer easy3d::util)
 
 set(${example}_files
         main.cpp