Compiled your proven portrait prompt into a Prompt DNA Template System. The source look is locked; the subject is the only declared variable, so you can reuse the prompt without rebuilding the lighting, lens, palette, or background. # Prompt DNA Template System ## Source DNA Locks - Composition: editorial studio portrait - Background: pure white seamless - Lighting: soft butterfly lighting - Lens language: 85mm - Palette: restrained neutral palette - Detail target: crisp skin detail - Locked intent: preserve the same clean studio look across subject swaps ## Variable Surface SUBJECT Purpose: change who appears in the portrait. Default: a thoughtful adult subject. Boundary: the slot may change identity, age presentation, expression, or styling, but it does not alter the white seamless, butterfly light, 85mm look, neutral palette, or crisp skin-detail target. ## Style Lock Block Editorial studio portrait. Pure white seamless background. Soft butterfly lighting. 85mm portrait-lens look. Restrained neutral palette. Crisp natural skin detail. Clean commercial finish with no unrelated scene styling. ## Compiled Template Editorial studio portrait of {{SUBJECT}}, photographed against a pure white seamless background with soft butterfly lighting, an 85mm portrait-lens look, restrained neutral color treatment, and crisp natural skin detail. Keep the frame clean, studio-controlled, and commercially polished. Preserve the white background, butterfly-light direction, portrait compression, neutral palette, and skin-detail clarity regardless of the subject. ## Propagation Map - {{SUBJECT}} → main portrait subject only - Background lock → remains pure white seamless - Lighting lock → remains soft butterfly lighting - Lens lock → remains 85mm portrait look - Color lock → remains neutral - Detail lock → remains crisp natural skin detail ## Variation Proofs Variation 1 SUBJECT: a sad middle-aged man with tired eyes, subtle stubble, and a charcoal crew-neck shirt Filled prompt: Editorial studio portrait of a sad middle-aged man with tired eyes, subtle stubble, and a charcoal crew-neck shirt, photographed against a pure white seamless background with soft butterfly lighting, an 85mm portrait-lens look, restrained neutral color treatment, and crisp natural skin detail. Keep the frame clean, studio-controlled, and commercially polished. Preserve the white background, butterfly-light direction, portrait compression, neutral palette, and skin-detail clarity regardless of the subject. Variation 2 SUBJECT: a confident older woman with silver hair, direct eye contact, and a simple ivory blouse Filled prompt: Editorial studio portrait of a confident older woman with silver hair, direct eye contact, and a simple ivory blouse, photographed against a pure white seamless background with soft butterfly lighting, an 85mm portrait-lens look, restrained neutral color treatment, and crisp natural skin detail. Keep the frame clean, studio-controlled, and commercially polished. Preserve the white background, butterfly-light direction, portrait compression, neutral palette, and skin-detail clarity regardless of the subject. ## Drift Guards Do not change the background away from pure white. Do not replace butterfly lighting with dramatic side, rim, neon, or environmental light. Do not introduce a different lens language or wide-angle distortion. Do not add scenic props, colored backdrops, cinematic environments, or unrelated art styles. Do not let wardrobe color dominate the neutral visual treatment. ## Usage Notes 1. Replace only {{SUBJECT}}. 2. Keep every lock sentence unchanged when consistency matters. 3. If you later want another variable, add it only where its meaning occurs and keep the existing locks intact. 4. If a model needs syntax-specific parameters, append them after the template rather than rewriting the visual DNA. Completion checks: - Style locks preserved: PASS - Variables thread consistently: PASS - Template is copy-ready: PASS - Only declared variable tokens remain: PASS