Gemini Black And White Portrait Prompt

Transform the uploaded photo into a photorealistic black-and-white editorial portrait of the same person. Preserve exact facial identity, age, facial proportions, skin texture, hairstyle and expression. Frame the head and upper chest vertically in a 4:5 composition, with the eyes near the upper third. Use a plain matte black crew-neck top and a seamless dark charcoal background. Illuminate the face with one hard studio light positioned to the left of the camera, creating a sharply defined transition between light and shadow while retaining faint detail on the shadow side. Keep both eyes anatomically accurate and the visible eye sharply focused. Render true neutral monochrome, rich blacks, controlled highlights and fine photographic grain. Maintain realistic pores and natural facial lines. Do not sculpt the jaw, alter the nose, enlarge the eyes, smooth the skin or change the person's identity. No accessories added, text, logos or watermarks.