Use nano banana: Apply a dramatic, localized deep-red light cast to the subject, inspired by intense red ambient lighting entering from one side of the scene. The red light should hit primarily the face, neck, upper chest, hair, and nearby surfaces, with a strong saturated crimson/red-orange glow and realistic falloff.Make the lighting feel physically present in the original environment, as if a powerful red traffic light, neon sign, brake light, or sunset reflection were shining through a nearby window. The side of the subject closest to the light source should be intensely illuminated in vivid red, while the opposite side should remain comparatively neutral and darker.Preserve natural shadow depth and facial dimensionality. Do not simply apply a uniform red filter over the entire image. The red illumination must interact realistically with the contours of the face and body: brighter on forward-facing surfaces, softer around the edges, and gradually fading into shadow.Keep the background mostly unchanged, allowing only subtle red spill on nearby objects or surfaces where physically plausible. Maintain deep blacks, moderate contrast, and slightly underexposed ambient surroundings so the red illumination feels especially striking.Color characteristics: rich saturated crimson, scarlet, and red-orange highlights; avoid pink, magenta, purple, or washed-out orange. Preserve believable skin texture underneath the colored illumination.Realism: photorealistic candid smartphone/compact-camera photograph, natural dynamic range, realistic light falloff, subtle highlight clipping in the brightest red areas, no artificial glow outlines, no bloom-heavy cyberpunk effect, no studio-light appearance.STRICT PRESERVATION: Keep the person’s identity, facial features, expression, body shape, pose, hairstyle, clothing, hands, background geometry, objects, framing, perspective, and composition exactly the same as the source image. Do not reshape, beautify, regenerate, move, add, or remove anything. Change the lighting and color illumination only.The final result should look like the original photograph was genuinely captured at the exact moment a very strong red light illuminated one side of the subject, not like a red color filter was added afterward.Make the red illumination unusually intense on the face, almost pure saturated red in the brightest areas, while retaining visible facial shadows and texture. Keep the rest of the image considerably darker and more neutral to maximize the contrast between the red-lit subject and the environment.