The back wall (first picture) is driving me crazy... and not too crazy about the wall next to it either.... the back wall is difficult to decorate because of the ledge midway up, other wise I would have had some large format posters/murals up... Any suggestions? The computer needs to stay where it is, but the mannequin and chair can definitely go... space is about 13ft wide by 9ft high... I've included other shots of the basement for theme reference. Would also love some suggestions if I should decorate the space at the top of the bookshelves...