Yes filmed in Melbourne Australia. I remember a story of the female lead saying making a film about the end of the world at the end of the world. She hated being in Melbourne as too backward according to her. Neville Shute was an Australian author who wrote several novels about WW2 from a different point of view. My favourite was "A Town called Alice" though he also wrote some environmental novels such as "The Tall Timbers" and a short story "In the shadow of superbus." This was about the European destruction of native Australian environments. Was apparently banned at the time.