Rao is releasing director Anand Gandhi's internationally acclaimed "Ship of Theseus" July 19 in association with UTV Motion Pictures.
"The film was produced when I came on board, so I am only presenting it. I am lending the film my name and whatever goodwill and credibility I have, so that the film gets wider audience," Rao, known for directing "Dhobi Ghaat", told.
"If Aamir had presented the film, it would have been a problem for the film because a lot of people would have come to see the film because of Aamir and not like the film. It's not a film that can take a wide audience."
"Everybody can't walk in and watch this film because they are not prepared for this kind of cinema, and then they might be disappointed. Aamir would have been a tricky sword to use. He may bring big audience, but they may not like this film," she added.
The movie premiered at the 2012 Toronto International Film Festival, is about human values and features three characters - an experimental photographer, ailing intellectual monk and a stock broker.
Right now "Ship of Theseus" is being released only in five cities - Mumbai, Pune, Delhi, Bangalore and Kolkata.