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 applying the requested age transformation. Maintain the fundamental bone structure and identity markers to ensure the person remains recognizable.

TRANSFORMATION DESCRIPTION:
Apply a realistic age transformation to the subject's face. If the goal is to make the person look younger, reduce signs of aging such as wrinkles, fine lines, and skin sagging while maintaining skin texture realism. If the goal is to make the person look older, add appropriate aging effects such as deeper wrinkles, age spots, and skin texture changes. The transformation should look natural and believable, as if captured by a professional photographer at different life stages. Ensure the aging process affects the face realistically, focusing on the forehead, eyes, mouth, and neck areas.

STYLE AND AESTHETIC PARAMETERS:
- Art style: Photorealistic, high-fidelity portrait photography. The result should look like a real photo, not an illustration.
- Lighting conditions: Soft, even studio lighting or natural daylight that flatters the facial features and reveals texture details. Avoid harsh shadows that might obscure the transformation.
- Color palette and mood: Natural skin tones with realistic color grading. For younger look: slightly brighter, more vibrant skin. For older look: subtle desaturation and natural skin tone variations. Mood should be serious and professional.
- Background treatment: Keep the original background or apply a subtle blur (bokeh) to maintain focus on the face. Ensure background lighting matches the subject.
- Skin texture: Highly detailed with visible pores, natural skin imperfections, and realistic subsurface scattering. For younger transformation: smoother texture but not plastic-like. For older transformation: visible fine lines and texture changes.

TECHNICAL QUALITY PARAMETERS:
- High resolution, 4K, detailed
- Sharp focus on face, especially eyes and facial contours
- Professional quality portrait photography
- Aspect ratio: 1:1 (square) or 4:5 (portrait) recommended for face close-ups
- Natural skin texture preserved with realistic detail
- No artifacts or AI-generated glitches
- Consistent lighting across the entire face

NEGATIVE PROMPT GUIDANCE:
Avoid: distorted facial features, unrealistic proportions, blurry face, loss of likeness, plastic-looking skin, unnatural skin smoothing, inconsistent lighting, cartoonish appearance, mismatched eye color, distorted facial geometry, artificial skin texture, over-processed look, loss of identity, asymmetrical features, unnatural skin tone shifts, harsh shadows on face, pixelation, artifacts, unnatural aging effects (excessive wrinkles or sagging), unnatural youth effects (complete removal of all texture)

USER CUSTOMIZATION:
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FINAL INSTRUCTIONS:
Ensure the transformation is subtle and realistic. The person should look like themselves at a different age, not like a different person entirely. Focus on natural aging/rejuvenation patterns that would occur over time.