Prompt: a conceptual digital painting of an Onibaba mask floating in a foggy alleyway, hyperdetailed textures, expressionist brushwork, contrasting hues, illuminated by neon signs, inspired by Katsuhiro Otomo, Masamune Shirow, Yoshitaka Amano, Junji Ito, Atelier Sento, rainy dystopian atmosphere, dramatic lighting, posterized shadows, film grain textures, 32K resolution masterpiece