diff -r a9bf6bab5ea2 -r 8efa3a33172e src/gl/partrenderer.h
--- a/src/gl/partrenderer.h	Wed Jun 15 19:47:02 2022 +0300
+++ b/src/gl/partrenderer.h	Mon Jun 20 02:04:51 2022 +0300
@@ -28,6 +28,7 @@
 	bool needBuild = true;
 	std::vector<RenderLayer*> activeRenderLayers;
 	std::vector<RenderLayer*> inactiveRenderLayers;
+	bool frozen = false;
 public:
 	PartRenderer(
 		Model* model,
@@ -56,6 +57,7 @@
 	void mouseMoveEvent(QMouseEvent* event) override;
 	void mousePressEvent(QMouseEvent* event) override;
 	void mouseReleaseEvent(QMouseEvent* event) override;
+	void keyReleaseEvent(QKeyEvent* event) override;
 	void wheelEvent(QWheelEvent* event) override;
 	Line<3> cameraLine(const QPointF& point) const;
 	glm::vec3 unproject(const glm::vec3& win) const;