Bioluminescent, An impossibly detailed, hyperrealistic wide shot depicting an interstellar metropolis dominated by a colossal, circular megastructure. Employing a vibrant, almost luminescent, color palette reminiscent of nebulae, the image should evoke a sense of awe-inspiring scale and intricate technological prowess. The megastructure, a symphony of gleaming metal and pulsating energy, frames a swirling vortex of distant stars, suggesting an interdimensional portal. Its surface teems with indecipherable glyphs and labyrinthine conduits, hinting at advanced functionality beyond human comprehension. The cityscape below, bathed in the ethereal glow of the megastructure, should feature towering spires and serpentine waterways, echoing the grandeur of the celestial structure above. A low camera angle, emphasizing the verticality of both the megastructure and the city, further enhances the sense of monumental scale. The image should lack any human figures, furthering the sense of the sublime and the unfathomable vastness of the universe.