0 0 0 NewI believe this is only unlockable after completion of the story: essentially, you need to go back to the Lighthouse, where Luna will ask some requests, which you have to paint. After completing one, she will do some stuff with the wall and something in the basement will happen. Doing it again will trigger the same thing, and her secret will be open. You are teleported to the base and the trophy pops. Inside is a big blank room, which you can make lots of Genies in, and, due to the fact that it is blank, you can paint anything you want there. There is a button inside if you want to reset all your paintings.