Filming on One Direction's concert movie will begin this weekend.
'Super Size Me' filmmaker Morgan Spurlock will start work on the 3D project in Tokyo, Japan, though he admits the technology isn't popular with everyone.
However, he said: ''Once they can crack that nut of having a true 3D experience where you don't have to have those glasses or sit at a certain angle, it will become a conversation again.''
The documentary maker - who also admitted he was considered to direct concert films for Justin Bieber and Katy Perry - said he wanted to work with the group because he is fascinated by their meteoric rise to fame since competing on 'The X Factor' UK in 2010.
He said: ''These guys have gotten so huge in such a short amount of time - why?
''What makes them more special than any other people?''
Niall said: ''Morgan works well because ... he did a lot of documentary movies. That's more so what we want our movie to be. It's going to be a concert movie, but with a documentary side than concert side so we wanted to get our personalities across because the fans know us, but we want them to know us deeper.''