Filmmaker Rakeysh Omprakash Mehra says Amitabh Bachchan's larger-than-life screen presence sometimes outshines his characters in films.

"Mr. Bachchan is a school on his own. His persona is huge and he has a style of his own. He has given birth to a different kind of acting approach, which has generations to follow. But it is a double-edged sword as often than not it tends to overshadow a character in a film, " Mehra told.

Three-film-old Mehra debuted in the Hindi film industry with Amitabh in the lead in "Aks" (2001). The actor was also seen in a cameo in his last film "Delhi-6" (2009).