diff -r 8e1c9f18ae15 -r 24275a4064f4 src/vertexmap.h
--- a/src/vertexmap.h	Tue Jul 27 16:29:00 2021 +0300
+++ b/src/vertexmap.h	Wed Jul 28 08:23:09 2021 +0300
@@ -19,7 +19,8 @@
 	Q_SIGNAL void verticesChanged();
 private:
 	const Model* const model;
-	std::map<unsigned int, glm::vec3> vertices;
+	QSet<unsigned int> vertexHashes;
+	std::vector<glm::vec3> vertices;
 	std::map<unsigned int, std::set<ldraw::id_t>> map;
 };