As the sun went down in Cannes, France, June 17, Twitter fired up a 40,000-lumens Barco projector mounted on a roof 150 feet across a street from the Palais des Festivals et des Congrès. The venue was the site of the Cannes Lions International Festival of Creativity, a weeklong award program to recognize creative excellence in advertising and communications. For the next several hours, a 3-D projection of tweets using the official event hashtag, #CannesLions, appeared on a 35- by 65-foot billboard located 30 feet above the venue’s entrance. The digital activation, created by Incredible Machines, ran for five hours that night and for the next three nights, while during the day the billboard showed a static image of the hashtag printed on canvas. The top tweets with the hashtag were projected onto the billboard at night, and the display also included live tweets from specific users that were selected by Twitter. The projection was a success, garnering substantial interest from the festival’s 12,000 attendees and contributing to more than 91,000 tweets using #CannesLions. That’s a 51 percent increase compared to 2012 and translated to a total reach of 542 million people, according to Buzz Radar. To generate excitement the first night, Twitter hosted a gathering in a penthouse across the street from the billboard right before the projector turned on.