Unreal cities—can AI generate them?

Cities are big complex 3D models and take time to create (model) and render. Various procedural generation concepts have been explored over the years and although some worked in limited or special cases, no one has found the holy grail of realtime city generation. Researchers at Nvidia have experimented using AI as a possible tool. By running video of a drive through a city as a training source, the researchers were able to get a somewhat passable synthetic version generated. But it has artifact, feature, and color challenges, as described in their paper here.   Generating a photorealistic video from