*With some AddOns there can occur a little error with the curtains. It's possible that objects right behind the curtain will disappear. During my tests it always helped, when I took the objects (also windows) away and put them back on their place, immediately. This error doesn't appear in the base game, and I think the reason of it is the transparency of the curtain. I don't have another solution, but I'm always grateful for tips :)