"Create a highly realistic and detailed illustration that fits within an aspect ratio of 9:16, designed to convey the essence of a dark, rain-soaked atmosphere without directly depicting rainfall. This image should capture the mood and ambiance akin to being in a somber, rain-drenched setting, using lighting, shadow, and environmental elements to evoke the feeling of a rainy day's melancholy and introspection. The focus is on creating a photographic realism in the artwork, where the viewer can almost feel the dampness and cool air associated with a rainy environment, despite the absence of visible rain. The composition should utilize a palette of dark blues, grays, and muted tones to enhance the impression of a world enveloped in the calm yet somber embrace of a rain-like atmosphere, chaos, 4k --ar 9:16 --niji 6