diff --git a/qglengine/glscene.cpp b/qglengine/glscene.cpp
index 2674b26..4b1b0b8 100644
--- a/qglengine/glscene.cpp
+++ b/qglengine/glscene.cpp
@@ -254,11 +254,17 @@ ObjectBase * Scene::selectedObject() const {
 }
 
 
+void gatherMeshes(ObjectBase * o, QSet<Mesh*> & ums) {
+	if (o->mesh()) ums << o->mesh();
+	for (int i = 0; i < o->childCount(); ++i)
+		gatherMeshes(o->child(i), ums);
+}
 void Scene::cleanUnused() {
 	QSet<Mesh*> ums;
-	QMapIterator<int, QMap<Mesh*, ObjectBaseList>> it(geometries_used);
+	gatherMeshes(root_, ums);
+	/*QMapIterator<int, QMap<Mesh*, ObjectBaseList>> it(geometries_used);
 	while (it.hasNext())
-		ums |= it.next().value().keys().toSet();
+		ums |= it.next().value().keys().toSet();*/
 	for (int i = 0; i < geometries.size(); ++i) {
 		if (ums.contains(geometries[i])) continue;
 		td_geometries << geometries[i];