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 age regression to show them in their youth (20s-30s). Maintain recognizable facial bone structure, distinctive marks, and core identity markers to ensure the person remains clearly identifiable.

TRANSFORMATION DESCRIPTION:
Transform the subject to appear 25-35 years younger, removing signs of aging while keeping their authentic appearance. Smooth skin naturally, reduce wrinkles and age spots, restore youthful facial volume, tighten jawline slightly, and brighten eyes. The transformation should reflect their natural appearance in early adulthood - vibrant, energetic, with youthful skin texture and natural facial contours. Preserve ethnic features and genetic traits while showing them at their peak youth.

STYLE AND AESTHETIC PARAMETERS:
- Art style: Photorealistic, natural portrait photography
- Lighting conditions: Soft, flattering natural light or warm studio lighting that enhances youthful glow
- Color palette: Warm, vibrant tones with healthy skin undertones; slightly enhanced saturation for youthful vitality
- Facial texture: Natural skin texture with subtle pores (not plastic/smooth), realistic hair with natural shine
- Background: Keep original background or apply soft bokeh blur to maintain focus on face
- Era-appropriate: Subtle 70s-90s aesthetic cues depending on age (optional)

TECHNICAL QUALITY PARAMETERS:
- High resolution, 4K, detailed
- Sharp focus on face, especially eyes and facial features
- Professional portrait quality, cinematic clarity
- Natural skin texture preservation (avoid plastic look)
- Aspect ratio: 4:3 or 3:4 for portrait orientation
- HDR quality with balanced contrast

NEGATIVE PROMPT GUIDANCE:
Avoid: distorted facial features, unrealistic proportions, blurry face, loss of likeness, plastic doll skin, exaggerated features, mismatched skin tones, unnatural eye colors, facial asymmetry, ghosting artifacts, over-smoothing, loss of ethnic characteristics

USER CUSTOMIZATION:
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ADDITIONAL TIPS:
- For best results, use a clear, front-facing photo with good lighting
- Specify desired youth age range in additional context if needed
- Mention specific era or decade for period-appropriate styling
- Reference known family resemblances or traits to preserve
- Use "light makeup" or "natural look" preferences if desired