ポートレート：30代日本人女性

同じお題を両モデルで生成。プロンプトの書き方・生成結果・得意分野の違いを並べて検証します。

OpenAI

GPT Image 2

プロンプト

A cinematic editorial portrait, 3:4 vertical aspect ratio.
Subject:
  - Age: 30 years old
  - Ethnicity: Japanese
  - Hair: shoulder-length black, slight inward curl at ends
  - Eyes: warm brown, soft confident gaze toward light source
  - Skin: natural texture, visible pores, minimal makeup
  - Distinguishing mark: small beauty mark near left cheekbone
  - Wardrobe: relaxed ivory linen shirt, silver hoop earrings
Composition:
  - Framing: chest-up, subject positioned at right third (rule of thirds)
  - Angle: eye level, slight 15-degree turn of body
Environment:
  - Location: minimalist Tokyo apartment interior
  - Light source: large north-facing window on right side
Lighting:
  - Type: overcast afternoon daylight
  - Quality: soft, even, preserves skin texture
  - Shadow: gentle gradient on left side of face
Color palette:
  - Skin highlight: #E8D5C4
  - Shirt: #F4EFE8
  - Background wall: #BFB8AE
  - Shadow tone: #3D3A36
Style: muted neutral grade, warm highlights + cool shadows, editorial cinema feel.

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Google

Nano Banana

プロンプト

A cinematic editorial portrait of a 30-year-old Japanese woman with shoulder-length black hair gently curling inward at the ends, warm brown eyes holding a soft and confident gaze, a small beauty mark near her left cheekbone, natural skin texture with minimal makeup, wearing a relaxed ivory linen shirt and simple silver hoop earrings. The image is captured with a Leica Q3 at 28mm, f/1.7, framed vertically from the chest up with the subject placed along the right third following the rule of thirds. She stands inside a minimalist Tokyo apartment near a large north-facing window on her right, her body turned fifteen degrees toward the daylight. The scene is illuminated by overcast afternoon light, yielding soft even shadows that preserve fine skin texture, while a gentle gradient falls across the left side of her face. The color grading balances warm amber highlights with cool muted shadows — evoking the restrained, human-scale palette of a Wim Wenders film.

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