Acclaimed actor Irrfan Khan says filmmakers are yet to realise the full potential in 3D as a format, and believes Ang Lee has used it well in "Life of Pi".

"'Life of Pi' is a very difficult film. It is based on a very complicated, interesting and intelligent book (of the same name). Ang Lee has done 3D for the first time and 3D is a new baby, who is still growing up, " Irrfan said here.

"We (Indian filmmakers) don't know the potential of 3D yet. It is untapped, " he added.

Irrfan, whose work in "Paan Singh Tomar" was widely appreciated, plays grown up Pi, the lead character, who gets stuck on a boat with a Bengal tiger in Lee's movie.

The younger Pi is essayed by Indian child actor Suraj Sharma, who has no previous acting experience.