The shader effects now work correctly on the scene actors, but the application of shaders should be on the animation class.

gui/combat_ui.cpp

@@ -24,6 +24,7 @@ namespace gui {
   {
     $gui.set<Sprite>(button, {icon_name});
     $gui.set<Sound>(button, {sound});
+
     $gui.set<Effect>(button, {.duration=0.5f, .name=effect_name});
     $gui.set<Clickable>(button,
         guecs::make_action(button, event, {action}));

gui/event_router.cpp

@@ -136,7 +136,7 @@ namespace gui {
           set_event(game::Event::KEY_PRESS);
           break;
         default:
-          dbc::sentinel("invalid events");
+          dbc::sentinel(fmt::format("invalid events: {}", int(ev)));
       }
     }
   }