A tech demo of “Grand Theft Auto V”, the popular work of the Rockstar Games, has appeared in a “reconstruction” with AI. Created by YouTuber / programmer Harrison Kinsley and programmer Daniel Kukina. The program, which they created and dubbed “Gone Theft Auto”, makes it possible to play part of the “Grand Theft Auto V” gameplay using only AI technology without the use of the original game engine.

“Gan Theft Auto” is a program that uses the AII model “GameGone” created by Nvidia. Looking at how it works, the picture quality is dim, but the car runs, the steering wheel turns by turning, and the lighting is implemented like a “Grand Theft Auto V”. However, all of these images are “automatically created images” created by AI. Let us explain the mechanism of this program step by step.

This program uses AI technology known as “GAN (Generative Adversarial Network)”. It is a type of generative model called “unsupervised learning” and features a system in which the two networks “Generator” and “Discriminator” compete with each other to improve learning accuracy. For example, it’s technology used in programs such as “Create a non-existent person’s face image” and “Create an image from an object name”.

Ginggan was developed by Nvidia with this song. This is an AI model that literally specializes in remaking games.RecognitionWas. “No game engine” means that a “potential” game screen will be created automatically in response to the AI ​​activity receiving the user’s input.

It looks like another AI-powered “Pac-Man”‘s input signal and a large data set screen transition were used to learn the game. As a result of the study, the basic laws of Pac-Man dots and the movement of ghosts are reconstructed. In other words, AI understands the in-game “rules” of “Pac-Man” and reproduces itself without the help of the game engine.

This “GAN Theft Auto” reproduces the “Grand Theft Auto V” using the above technology. Since this is also generated by AI automatically, all responses and drawings to the action will be displayed on the screen as AI predicted “it will come”. In addition to simple behavior, it also recreates the light reflected on the car body, the shadows cast on the road, and the movement of the landscape. All of these drawings are amazingly reproduced by learning AI.

Kinsley rented the DGX Station A100 workstation from Nvidia to develop “Gone Theft Auto”. It is an AI computing machine that includes four Nvidia A100 GPUs worth over 1 million yen. Kinsley and Kukina said that in the Grand Theft Auto V game, 12 AIs are running on the machine at the same time, learning data from the same highway. Video For output video, the rough pixel image is said to be softened using super sampling technology AI.

However, the AI ​​that showed the results also seems to have weaknesses, one of which is collision detection. In Kinsley’s video, you can see that contact with the NPC vehicle interferes with the driving of the vehicle. However, the NPC vehicle eventually disappeared from the screen because the complex character could not be recreated. In addition, the police collided with the NPC vehicle and split the opponent’s vehicle into two. NPC vehicles show different movements than their own vehicles and landscapes, so learning AI can be difficult. This is an interesting test result.

In addition, “Gone Theft Auto” was developed in about two months, and the program is owned by Mr. KinsleyGitabIt was published. About this, “Must be able to work on a normal PC”. However, Python’s operating environment and machine learning library need to be installed for implementation.

Is it any wonder that even advanced games like “Grand Theft Auto V” can be reproduced by AI technology to some extent? Gamers will be happy with the progress of AI, which is closely related to game development. Depending on future events, there may come a day when you can play “AI-made games”.