Cinematographer-turned-director S. Krishna is shooting vigorously for his upcoming flick - Gajakesari. The film starring Yash and Amulya in lead roles, is touted to be made on a whopping budget of Rs 15 crores. Meanwhile, Krishna has shot an entire sequence underwater, which he reveals to be the intro scene for Amoolya. He also reveals that Yash and Amoolya learnt some underwater technics and sign language for the shot. Interestingly, Amoolya has done the scene, without even knowing swimming.