they had a complicated system where they generated the image starting at low res and then scaling up to high res but they were able to get it to work and then in 2015 I believe later that same year palek Radford and sumh intelli and Luke Metz published the DC gain paper which it stands for deep convolutional again it's kind of a non unique name because these days basically all gans and even some before that were deep in convolutional but they just kind of picked a name for a really great recipe where they were able to actually using