Round underground megalopolis with a diameter of 5 km under a dome of

Round underground megalopolis with a diameter of 5 km under a dome of artificial sky. Modern architecture with vertical gardens, neon signs and flying cars. In the center is a big sun (a thermonuclear reactor in the glass sphere). People in cyber-deeds walk along multi-level squares. Style: Cyberpank-Realism, detail as in the Running Blade 2049 .