<p>Five years ago, the CGI tale of a Viking boy becoming friends with a toothless dragon was a massive global box office success. So a sequel soaring into cinemas was inevitable. But this time the movie makers behind "How to Train Your Dragon 2" were armed with a secret weapon: new revolutionary 3D technology called Apollo. We tell you more. </p><br />Also on the show, we go from films to infra-red. The recent discovery of another painting hidden beneath an early Picasso masterpiece, "The Blue Room", is the latest in a number of finds made possible by X-ray technology that analyses the different layers of paint used. Now the question conservators are hoping to answer is simply this: who is the mystery man underneath?<br /><br />Visit our website:<br />http://www.france24.com<br /><br />Like us on Facebook:<br />https://www.facebook.com/FRANCE24.English<br /><br />Follow us on Twitter:<br />https://twitter.com/France24_en
