Recent advances in technology have brought 3D films into the mainstream with better ways to capture 3D imagery and the widespread availability of digital projectors that make it easier to exhibit.Cinema projector: Getty Images/Alejandro Mozo. Butterfly: Lisa Thornberg/Getty Images. Camera: Uli Hamacher/Getty Images. Flower: Daisuke Morita/Getty Images. Woman in audience: zhaolinghe/Getty Images.