Kamal Haasan is currently busy shooting some important scenes for his magnum opus 'Viswaroopam' in the United States, that too amid tight security to avoid any information from getting out.

"Kamal, who is also directing and producing the movie besides playing the lead role, canned some amazing action and romantic scenes. They have come good and he is satisfied with the output. The US schedule is getting over today (January 20)," say sources.

After a short break, Kamal will start the next schedule, which is expected to be take place in Chennai. "Kamal is leaving no stone unturned to ensure that the movie would be technically brilliant and at the same entertaining," add sources.

The Ulaganayagan is said to be playing more than one character in the movie, and one among them is that of an Afghan ultra. His younger daughter Akshara Haasan, whose passion is filmmaking, has been assisting Kamal in making the movie.