This new version uses an additional model that allows for a 1024×1024 output and adds more details like skin texture, eyebrows and eyelashes. There are still several technical issues that I need to find a solution for, like for example the repetitive patterns that appear in low-entropy areas.
Also check out the great talk about the topic.
Generative adversarial network
A generative adversarial network (GAN) is a class of machine learning systems. Two neural networks contest with each other in a zero-sum game framework.
Definition from Wikipedia – Generative adversarial network