diff --git a/src/core/scene/glscene.cpp b/src/core/scene/glscene.cpp
index 5e047d2..63c2695 100644
--- a/src/core/scene/glscene.cpp
+++ b/src/core/scene/glscene.cpp
@@ -108,6 +108,9 @@ void Scene::clear() {
 	emit __destroyed();
 	if (destroying) return;
 	emit treeChanged();
+	mat_changed = lights_changed = true;
+	need_reload_materials        = true;
+	tree_struct_changed          = true;
 }