4k quality

Improve the quality of the portrait while strictly preserving the subject’s identity, expression, and facial shape. Keep the background and the original lighting direction exact. Mandatory rendering as if shot on a Sony A1 with an 85mm f/1.4 lens (f/1.6, ISO 100, 1/200s), achieving a cinematic shallow depth of field, perfect focus, and a neutral editorial color profile. Apply subtle cleanup (no transformation), premium realism, natural skin texture (not overly smoothed), and enhanced cinematic lighting (soft directional light, warm highlights, cool shadows) with expanded dynamic range. Preserve the original background completely. Render in 4K resolution with subtle film grain. No new objects, changes, or dramatic lighting. (Negative prompt: no face transformation, overly smooth skin, fake shine, or background change).