Cinematic 8k wallpaper of Ellen Ripley from Alien movie; an astronaut with helmet on, visor closed, gazing upwards in an action pose. She stands amidst the intricate interiors of the Nostromo space shuttle, embodying the essence of sci-fi. Bathed in ultra-detailed ray tracing and highest detail quality, the scene flaunts chiaroscuro and an ultra-realistic, epic feel akin to promotional art. The overcast reflection mapping coupled with hyperphotorealistic details emphasizes rim lighting and stoic cinematic drama. Captured with a movie quality touch, reminiscent of being shot on a Canon 5D, the octane render delivers an 8k, ultra-realistic visual marvel subtly infused with creative nuances.