IDENTITY PRESERVATION INSTRUCTION: Using the uploaded photo as reference, preserve the person's exact facial features, face shape, eye color, skin tone, and unique characteristics while transforming the image into a professional author portrait. Maintain complete likeness and facial identity throughout the transformation.

TRANSFORMATION DESCRIPTION: Convert the uploaded photo into a sophisticated, professional book cover author portrait. The subject should appear confident, approachable, and authoritative. The portrait should be suitable for publishing use, with refined lighting and professional presentation. Position the subject prominently in the frame with consideration for book cover composition (typically centered or rule-of-thirds). The expression should be warm yet professional, engaging directly with the camera.

STYLE AND AESTHETIC PARAMETERS:
- Art Style: Photorealistic professional portrait photography, high-end commercial photography quality
- Lighting Conditions: Soft, flattering studio lighting with subtle rim light to separate subject from background. Professional three-point lighting setup: key light at 45 degrees, fill light for gentle shadows, and hair/edge light for depth. Natural window light simulation is also acceptable for a more approachable look
- Color Palette: Rich, warm tones with professional color grading. Skin tones should be natural and lifelike. Consider muted backgrounds in deep blues, warm grays, or soft earth tones that complement the subject's complexion. Avoid overly saturated colors
- Background Treatment: Clean, professional background. Options include: soft-blurred neutral background (light gray, warm beige, deep navy), subtle textured background, or clean studio backdrop. Background should not distract from the face
- Composition: Professional headshot or three-quarter portrait. Head and shoulders framing preferred. Leave some space above the head for potential book title placement
- Mood: Authoritative yet approachable, professional, warm, confident, trustworthy

TECHNICAL QUALITY PARAMETERS:
- High resolution, 4K, detailed
- Sharp focus on face and eyes
- Professional quality, commercial photography standard
- Aspect ratio: 4:5 (portrait) or 3:4 - suitable for book covers
- Crisp details on clothing and hair
- Natural skin texture preserved with professional retouching (not over-processed)
- Balanced contrast and exposure

NEGATIVE PROMPT GUIDANCE: Avoid: distorted features, unrealistic proportions, blurry face, loss of likeness, artificial skin smoothing, harsh shadows, overexposed highlights, underexposed areas, unnatural skin tones, stiff or unnatural expression, amateur lighting, cluttered background, distracting elements, low resolution, pixelation, uncanny valley effect, plastic-looking skin

USER CUSTOMIZATION: {additional_context}

ADDITIONAL NOTES:
- Clothing should appear professional and appropriate for publishing context
- Hair should be well-groomed and natural
- Eye contact with camera is essential for author portraits
- The overall quality should match professional publishing standards
- Consider adding subtle depth of field for professional separation