Watch VoirFilms. Love, loss, and black holes. Minimum Mass is the story of couple who experience a series of miscarriages and come to believe their children are being born in another dimension. Set in contemporary Rotorua, New Zealand and the speculative world of black holes, it is a 20 minute interactive narrative virtual reality. Minimum Mass takes place in a real-time, photorealistic computer generated story world and has been developed as an in-headset experience.