Nano Banana 提示词作品

{
  "style_prompt_template": {
    "subject": "{{PERSON_NAME_OR_IMAGE}}",
    "aspect_ratio": "9:16 vertical",
    "canvas_size_guidance": "1080x1920 or equivalent 9:16",
    "shot_type": "medium portrait shot, zoomed out 50% from tight close-up, head-to-mid-torso visible, facing camera",
    "photography_style": "dramatic black and white studio portrait, editorial/fine-art photography",
    "composition": {
      "face_position": "subject's face centered both horizontally and vertically in the frame",
      "face_size_in_frame": "face occupies roughly 20-25% of frame height, not tightly cropped, ample negative space around subject",
      "eye_line": "eyes aligned at approximate vertical center of the canvas",
      "headroom": "generous margin above the hair, clear dark space visible above head",
      "crop": "visible down to mid-chest or waist, more of the suit and shoulders shown, wider view than a tight headshot",
      "surrounding_space": "large area of negative black space surrounding subject on left, right, top, and bottom",
      "alignment": "subject facing straight into camera, symmetrical framing, no off-center offset"
    },
    "lighting": {
      "type": "single hard top-down spotlight (butterfly/Paramount lighting)",
      "quality": "harsh, narrow beam creating strong falloff",
      "key_highlight": "top of hair and forehead catch bright rim light",
      "shadow_behavior": "deep shadows under brow, cheekbones, and jawline; steep light-to-dark gradient across face",
      "background_light": "none; background falls into near-total darkness with faint gradient near top edge, spotlight cone visible in wider frame"
    },
    "color_treatment": "monochrome black and white, high contrast, deep blacks, no gray midtone flatness",
    "background": "solid black or near-black, subtle vignette, no visible texture or props, large expanse of negative space",
    "wardrobe": "dark tailored suit jacket, white dress shirt, dark tie, formal/business attire, full torso visible",
    "expression_and_pose": "neutral to serious expression, calm and composed, minimal smile, direct gaze into lens, relaxed shoulders",
    "skin_and_texture_detail": "visible natural skin texture, pores, fine wrinkles, stubble if present, unretouched realism",
    "hair_detail": "individual strands visible and crisply lit, natural texture, not overly styled",
    "camera_and_lens": "shot as if on medium format camera, 50mm-85mm equivalent lens, greater working distance from subject, shallow depth of field, tack-sharp focus on eyes",
    "grain_and_finish": "fine film-like grain, high dynamic range, crisp micro-contrast, glossy editorial finish",
    "mood": "intense, powerful, cinematic, timeless"
  },
  "negative_prompt": "color cast, flat lighting, soft focus, blown highlights on face, busy background, smiling broadly, low contrast, blurry details, off-center face, face cropped at edge, horizontal framing, extreme close-up, tight crop, face filling entire frame"
}