Spectacular, Ultrarealistic, Art illustration, low-angled view, showcasing an extraterrestrial civilization building an underwater city, luminescent aquamarine structures, undulating waves, currents, depth effects, bioluminescent sea life, ethereal, serene ambiance, oil on canvas, meticulous detail, rich textures, soft ambient light source, deep blues, purples dominate palette, imaginative sci-fi illustration, transports the viewer into a mesmerizing alien universe by: Alois Arnegger, Van Gogh
An extraterrestrial civilization builds an underwater city. 