diff -r 21a5ecbe34e4 -r 3cef3b016330 src/main.cpp
--- a/src/main.cpp	Tue Apr 11 20:27:04 2023 +0300
+++ b/src/main.cpp	Tue Apr 11 22:39:18 2023 +0300
@@ -75,6 +75,7 @@
 	QStringList recentlyOpenedFiles;
 	ColorTable colorTable;
 	gl::RenderPreferences renderPreferences;
+	gl::build_preferences user_gl_build_preferences;
 	MessageLog messageLog;
 	ToolWidgets toolWidgets{
 		.circleToolOptions = new CircleToolOptionsWidget{&mainWindow},
@@ -176,12 +177,22 @@
 	});
 }
 
+static void rebuild_polygons_for_all_models(MainState* state)
+{
+	forEachModel(&state->documents, [](const void*, const ModelData* data){
+		if (data->canvas != nullptr) {
+			data->canvas->build();
+			data->canvas->update();
+		}
+	});
+}
+
 static void updateRenderPreferences(MainState* state)
 {
 	forEachModel(&state->documents, [state](const void*, const ModelData* data){
 		if (data->canvas != nullptr) {
-			data->canvas->setRenderPreferences(state->renderPreferences);
 			data->canvas->setLayerEnabled(data->axesLayer.get(), state->renderPreferences.drawAxes);
+			data->canvas->update();
 		}
 	});
 	state->mainWindow.setRenderStyle(state->renderPreferences.style);
@@ -189,12 +200,18 @@
 	state->mainWindow.actionWireframe->setChecked(state->renderPreferences.wireframe);
 }
 
+static gl::build_preferences load_gl_build_preferences_from_settings()
+{
+	return gl::build_preferences{
+		.mainColor = setting<Setting::MainColor>(),
+		.backgroundColor = setting<Setting::BackgroundColor>(),
+	};
+}
+
 static gl::RenderPreferences loadRenderPreferences()
 {
 	return gl::RenderPreferences{
 		.style = setting<Setting::RenderStyle>(),
-		.mainColor = setting<Setting::MainColor>(),
-		.backgroundColor = setting<Setting::BackgroundColor>(),
 		.selectedColor = setting<Setting::SelectedColor>(),
 		.lineThickness = setting<Setting::LineThickness>(),
 		.lineAntiAliasing = setting<Setting::LineAntiAliasing>(),
@@ -327,7 +344,8 @@
 			data->tools.get(),
 			&EditTools::modelAction,
 			std::bind(executeAction, model, std::placeholders::_1));
-		data->canvas->setRenderPreferences(state->renderPreferences);
+		data->canvas->render_preferences = &state->renderPreferences;
+		data->canvas->build_preferences = &state->user_gl_build_preferences;
 		QObject::connect(
 			data->tools.get(),
 			&EditTools::newStatusText,
@@ -388,10 +406,12 @@
 {
 	state->recentlyOpenedFiles = setting<Setting::RecentFiles>();
 	state->renderPreferences = loadRenderPreferences();
+	state->user_gl_build_preferences = load_gl_build_preferences_from_settings();
 	state->libraries.restoreFromSettings();
 	updateRecentlyOpenedDocumentsMenu(state);
 	state->colorTable = loadColors(&state->libraries);
 	updateRenderPreferences(state);
+	rebuild_polygons_for_all_models(state);
 	state->mainWindow.mdiArea->setViewMode(setting<Setting::ViewMode>());
 	state->mainWindow.retranslateUi(&state->mainWindow);
 	state->mainWindow.setToolButtonStyle(setting<Setting::ToolButtonStyle>());
@@ -731,7 +751,6 @@
 		}
 	);
 	restoreSettings(&state);
-	updateRenderPreferences(&state);
 	const int result = app.exec();
 	saveSettings(&state);
 	return result;