diff -r 21a5ecbe34e4 -r 3cef3b016330 src/gl/partrenderer.h
--- a/src/gl/partrenderer.h	Tue Apr 11 20:27:04 2023 +0300
+++ b/src/gl/partrenderer.h	Tue Apr 11 22:39:18 2023 +0300
@@ -23,7 +23,6 @@
 	glm::vec3 modelViewOrigin = {0, 0, 0};
 	QPoint lastMousePosition;
 	int totalMouseMove = 0;
-	gl::RenderPreferences renderPreferences;
 	double zoom = 1.0;
 	bool initialized = false;
 	bool needBuild = true;
@@ -32,13 +31,16 @@
 	std::chrono::time_point<std::chrono::steady_clock> lastClickTime;
 	bool frozen = false;
 public:
+	static const gl::RenderPreferences default_render_preferences;
+	static const gl::build_preferences default_build_preferences;
+	const gl::RenderPreferences* render_preferences = &PartRenderer::default_render_preferences;
+	const gl::build_preferences* build_preferences = &PartRenderer::default_build_preferences;
 	PartRenderer(
 		QTextDocument* model,
 		DocumentManager* documents,
 		const ColorTable& colorTable,
 		QWidget* parent = nullptr);
 	~PartRenderer() override;
-	void setRenderPreferences(const gl::RenderPreferences& newPreferences);
 	ModelId getHighlightedObject() const;
 	void addRenderLayer(RenderLayer* layer);
 	void setLayerEnabled(RenderLayer* layer, bool enabled);
@@ -50,11 +52,11 @@
 	glm::vec3 cameraVector(const QPointF& point) const;
 	Line<3> cameraLine(const QPointF& point) const;
 	Q_SLOT void setModelViewOrigin(const glm::vec3& newViewOrigin);
+	Q_SLOT void build();
 Q_SIGNALS:
 	void projectionMatrixChanged(const glm::mat4& newMatrix);
 	void modelMatrixChanged(const glm::mat4& newMatrix);
 	void viewMatrixChanged(const glm::mat4& newMatrix);
-	void renderPreferencesChanged();
 	void message(const Message& message);
 private:
 	void initializeGL() override;
@@ -70,7 +72,6 @@
 	void renderScene();
 	void updateViewMatrix();
 	void updateModelMatrix();
-	Q_SLOT void build();
 	void renderVao(const gl::ArrayClass arrayClass, const GLenum glType);
 	template<gl::ArrayClass arrayClass>
 	void renderVao();