The makers of ' Dhoom 3 ' are using some unique marketing technique to promote the film. This time they have done the unthinkable. For the first time ever the logo on the YRF Studio building has been changed.The big Y logo on the top of the building had been installed from the very start. Never has it been changed. This time to highlight the movie of the year, they have changed their logo to Aamir Khan 's Dhoom 3 joker's mask.The makers have been using a lot of different marketing techniques releasing only 30 second visuals of songs, less promotions, no preview etc etc and now changing the logo to the D3 mask has been the final nail.This has generated a lot of excitement and curiosity among the audience.