Progressive Growing of GANs offers a methodology that circumvents many of the problems related to GANs. It was the first publication to produce CelebA images using a resolution of 1024 by 1024; this was a task that was very challenging at the time the paper was published:
Samples generated with Progressive Growing of GANs. Source: Progressive Growing of GANs for Improved Quality, Stability and Variation. https://arxiv.org/pdf/1710.10196.pdf
As the name suggests, the methodology used in Progressive Growing of GANs consists of gradually increasing the resolution of the inputs, in this case, images, which are being handled or synthesized by the discriminator and generator. Likewise, layers are added to the discriminator and the generator in order to support higher resolutions.
In practice, instead of adding layers, a user defines the full graph of the...