Ellen Ripley in an ultra-realistic, cinematic 8k wallpaper, wearing a detailed astronaut suit with the helmet on and visor closed. She's striking an action pose, looking upward with determination. The scene is set against the intricate interiors of the Nostromo space shuttle, epitomizing a sci-fi aesthetic. Emphasizing the chiaroscuro lighting and a subtle rim light effect, the environment is portrayed with overcast reflection mapping for depth. The image is hyper-photorealistic, exuding a stoic and epic cinematic quality, akin to a promotional shot taken with a Canon 5D. Rendered with octane, the scene shines in ultra-high detail akin to movie quality.