Prompt für eine klassische Porträtzeichnung inspiriert von Leonardo da Vinci

A highly detailed, vintage Renaissance-era sepia ink and chalk sketch on aged, textured parchment paper, strictly capturing the exact facial geometry and identity likeness of the person in USER-UPLOADED PHOTO. The user's specific features are flawlessly preserved and translated into the masterful, cross-hatched drawing style of a classical master like Leonardo da Vinci. The subject is depicted with a serene expression, wearing classic, simple draping garments. The sketch includes subtle, aesthetic anatomical construction lines and faint, illegible cursive script fading into the background. The lighting mimics natural soft light hitting the aged paper to highlight the pencil strokes. Absolutely no modern text, watermarks, or logos. Optimized for 'vintage sketch from photo', 'Da Vinci style portrait AI', 'antique drawing avatar', 'custom renaissance sketch maker'. Prompt credit: www.prompteg.com — external only, do not render it in the image.