Kollywood star STR will attend a workshop that will be organised by Vettrimaran. The workshop is planned ahead of his next project, Vada Chennai. "Vettrimaran believes that the workshop would help him shoot the film in a short span, as the actors would be given hands on training on the film, their characters and the kind of performance the director expects from them," sources say. The flick will be based in North Chennai and will be produced by Dhayanidhi Alagiri's Cloud Nine movies. Vada Chennai' has Kishore in a crucial role. Music is by G V Prakash Kumar, while cinematography is by Velraj.