Working for Nintendo since 1994, Martinet started voicing Mario at video game trade shows in which attendees would walk up to a TV screen displaying a 3-D Mario head that moved around the screen and talked. This system was called "Mario in Real-Time" or "MIRT". Martinet could see the attendees by means of a hidden camera setup, and a facial motion capture rig recorded his mouth movements in order to synchronize Martinet's mouth movement with the on-screen Mario mouth movement. This digital puppetry, with Martinet's comic performance, was a novelty at the time.