A breathtaking 8k ultra-realistic image of a samurai warrior standing tall with a striking yellow war flag banner, showcasing a full-length view. The warrior is adorned in intricate yellow and black armor, with ornate cinematic lighting highlighting the high-definition, vibrant details. The scene is hyperrealistic with intense focus, rendered with Unreal Engine 5, creating a dark ambiance with lumen reflections. Depth of field enhances the photography, set against a reddish war-torn backdrop filled with swirling smoke and glowing embers, capturing a sense of epic cinematic drama.