The American research team has developed an artificial intelligence model called InfiniCity, which can quickly create a detailed three-dimensional virtual city that can extend in all directions indefinitely. This is very useful for creating a virtual reality world that can be interacted by millions or even hundreds of millions of people, or for training autonomous vehicle to cope with new environments. Relevant research was recently published on the preprint website. Creating a detailed 3D environment requires collecting a large amount of real-world data, which may require a large 3D designer team to work for a long time. In order to create a virtual reality world as quickly and efficiently as possible, the Snap Research Institute team of Snapchat, an American technology company, developed the "infinite city" and used it to create a virtual city that can extend infinitely in all directions. Researchers pointed out that in the future, if people want to roam in virtual reality space, they need such a large space. People can't hire millions of 3D designers to create these environments, so these generation models are needed to help create such environments in the future to accommodate millions or billions of users. The creation of these cities is completed in three stages: first, the team uses the neural network trained on the real map of London to generate a two-dimensional satellite map of the virtual city, and then another neural network converts these maps into three-dimensional pixel clouds, representing the shapes of buildings or trees, etc. Finally, artificial intelligence gives these objects textures, and converts them from block shapes to similar real, photographed objects. The research team said that in addition to creating a virtual reality environment for people to roam, these maps can also help train autonomous vehicle. Unmanned vehicles that can be trained to run smoothly in one place are unlikely to cope with traffic in other places without understanding other environments. To do this, we need to improve the precision of the map. The latest research progress also helps designers and architects plan new buildings or develop larger projects. (Xinhua News Agency)