Stephen St Leger and James Mather have collaborated on the concept of directing a 15-minute high-energy genre movie shot entirely on green screen and post produced by themselves. Prey Alone is almost entirely digitally created, in fact the only elements of live action in the movie are the actors and some hand props. Everything else was built in post production using Max and After Effects by the Irish filmmakers. Find out more at PreyAlone.com, CGChannel also has a great article on the production of the movie.