diff --git a/libs/ui/include/psemek/ui/controller.hpp b/libs/ui/include/psemek/ui/controller.hpp
index 189a5091..ec7141e9 100644
--- a/libs/ui/include/psemek/ui/controller.hpp
+++ b/libs/ui/include/psemek/ui/controller.hpp
@@ -22,6 +22,8 @@ namespace psemek::ui
 		void set_hint_delay(float seconds);
 		void on_hint(util::function<void(element *)> callback);
 
+		void set_post_draw_effect(util::function<void(element *, painter &)> effect);
+
 		void reshape(geom::box<float, 2> const & shape);
 
 		bool event(mouse_move const & e);
diff --git a/libs/ui/source/controller.cpp b/libs/ui/source/controller.cpp
index 8af42246..b235c331 100644
--- a/libs/ui/source/controller.cpp
+++ b/libs/ui/source/controller.cpp
@@ -68,6 +68,7 @@ namespace psemek::ui
 		util::function<void(element *)> on_hint;
 		std::optional<std::weak_ptr<element>> hinted_element = std::nullopt;
 		std::optional<std::string> hint_called = std::nullopt;
+		util::function<void(element *, struct painter &)> post_draw_effect;
 
 		impl(async::event_loop * loop);
 
@@ -212,6 +213,11 @@ namespace psemek::ui
 		impl().on_hint = std::move(callback);
 	}
 
+	void controller::set_post_draw_effect(util::function<void(element *, painter &)> effect)
+	{
+		impl().post_draw_effect = std::move(effect);
+	}
+
 	void controller::reshape(geom::box<float, 2> const & shape)
 	{
 		impl().root->reshape(shape);
@@ -321,7 +327,11 @@ namespace psemek::ui
 			for (auto c : elem->children())
 				if (c) self(c);
 			if (visible)
+			{
 				elem->post_draw(impl().painter);
+				if (impl().post_draw_effect)
+					impl().post_draw_effect(elem, impl().painter);
+			}
 		});
 
 		visitor(impl().root.get());