A trio of shimmering skyscrapers would feature luxury condos, a five-star hotel and an open-air galleria with retailers and restaurants. Among the amenities: private screening rooms, a two-acre park, pet grooming services and a rooftop pool. The towers went up but were unfinished and empty. Now those skyscrapers have become a symbol of street swagger, “bombed” with the work of dozens of graffiti writers and artists. Their aliases cover windows that rise more than 40 stories, visible from the nearby highways.