Actress Rakul Preet Singh, who was recently seen in the Nikhil Mahajan-directorial 'I Love You', has spoken about her upcoming sci-fi film 'Ayalaan', which she went on to call a 'once in a lifetime experience'.

'Ayalaan', which is directed by Tamil filmmaker R. Ravi Kumar is a sci-fi-extraterrestrial-comedy film which employs a great deal of VFX and high-quality CGI. While using CGI in Indian films is nothing new, having a movie with more than 4,500 CGI shots is a new one.