"(I) had a sneak preview of Rajni sir's motion capture results for one of the songs from 'Kochadaiyaan'. (It) looks like animation on steroids! Epic," posted Rahman on his Twitter page.
Rahman has composed the music for the film, directed by Rajini's daughter Soundarya Ashwin.
'Kochadaiyaan' is said to be India's first film with motion capture technique along the lines of Hollywood films 'Tin Tin' and 'Avatar'.
Also featuring R. Sarath Kumar, Aadi Pinisetty, Shobana, Jackie Shroff, Deepika Padukone and Nassar, it has been jointly produced by Eros International and Media One Global Entertainment. The film is currently in its post-production phase.