見上げる横顔の子猫ほど心をくすぐる存在はありません。
大きな瞳に映る光、ぴんと立った耳、ほんのり上がった口元――その一瞬を切り取るプロンプトは、まるで物語のワンシーンのようです。
ここでは、横顔が映える20種類の品種と毛色を厳選し、室内の柔らかな光に包まれた子猫の魅力を最大限に引き出す構図をご紹介します。
- 最新情報について：この記事は2025年12月時点の情報・AIモデルをもとに執筆しています。今後のアップデートにより、機能や生成結果が変わる可能性があります。
- 画像について：本記事の画像は、実在しないAI生成イメージです。
- プロンプトについて：紹介したプロンプト（指示文）は、全く同一の画像が生成されることを保証するものではありません。AIとの一期一会の出会いをお楽しみいただき、ご参考としてお使いください。
プロンプトのポイント
今回使用した基本プロンプトはこちらです（赤字のところを適宜品種を変えた上で画像生成をお試しください）
A single small kitten [breed and coat] sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
日本語訳：室内で小さな子猫がちょこんと座り、明るく好奇心に満ちた表情で上を見上げている。子猫の片方の耳はくっきりと高く立ち、もう片方の耳も自然に見えている。口元は角がほんのり上がっており、やわらかく注意深い表情をつくっている。子猫の頭部から上半身にかけての横顔が、物やほかの動物に遮られることなくはっきりと見えている。室内のあたたかく柔らかな光、細部までリアルな毛並みの質感、そしてシンプルで目立ちすぎない背景が特徴。
見上げるたびにワクワクが増える子猫たち
アメリカンショートヘア（シルバータビー）
A single small kitten American Shorthair, Silver Tabby sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
ブリティッシュショートヘア（ブルー（グレー））
A single small kitten British Shorthair, Blue sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
ロシアンブルー（ソリッドブルー）
A single small kitten Russian Blue, Solid Blue sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
サイアミーズ（シャム・シールポイント）
A single small kitten Siamese, Seal Point sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
シンガプーラ（セピア・アグーティ）
A single small kitten Singapura, Sepia Agouti sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
アメリカンカール（短毛・ブルータビー）
A single small kitten American Curl (Shorthaired), Blue Tabby sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
エジプシャンマウ（シルバースポテッド）
A single small kitten Egyptian Mau, Silver Spotted sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
バーミーズ（シャンパン）
A single small kitten Burmese, Champagne sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
セルカークレックス（短毛・ブルー＆ホワイト）
A single small kitten Selkirk Rex (Shorthair), Blue and White sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
ラグドール（シールポイントバイカラー）
A single small kitten Ragdoll, Seal Point Bicolor sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
バーマン（チョコレートポイント）
A single small kitten Birman, Chocolate Point sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
シャルトリュー（ソリッドグレー）
A single small kitten Chartreux, Solid Gray sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
スコティッシュフォールド（立ち耳・シルバータビー）
どこまで描写できるのかチャレンジしてみました。
A single small kitten Scottish Fold (Straight Ear), Silver Tabby sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
オリエンタルショートヘア（チョコレート）
A single small kitten Oriental Shorthair, Chocolate sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
アビシニアン（ルディ）
A single small kitten Abyssinian, Ruddy sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
ベンガル（スノーマーブル）
A single small kitten Bengal, Snow Marble sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
トンキニーズ（プラチナミンク）
A single small kitten Tonkinese, Platinum Mink sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
デボンレックス（クリーム）
A single small kitten Devon Rex, Cream sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
ChatGPT Images 1.5はなぜかデボンレックスだけ基本プロンプトだと片耳が欠損する事象が高確率で破綻します。そこで、破綻を抑制した以下のプロンプトをお試しください。
A single small kitten Devon Rex, Cream sitting indoors, looking upward with a bright, curious expression. The kitten’s ears are fully visible and naturally proportioned, with both ears contained entirely within the frame. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
日本語訳（ここをクリック）
日本語訳：室内で座って、目を輝かせながら上を見上げている、小さなデボンレックスの子猫（クリーム色）を1匹。子猫の耳は、自然なバランスで両方ともはっきりと見えており、どちらの耳もフレームの中にきちんと収まっています。口元は口角がわずかに上がった、やさしく注意深い表情です。子猫の頭から上半身にかけた横顔が、遮るものなくはっきりと見える構図になっています。やわらかく暖かい室内光で、毛並みの質感はリアルで細部まで描写され、背景はシンプルで主張しすぎないものにします。
技術的な理由は本記事の後半「（参考）デボンレックスの片耳欠損問題」や別記事で解説しております。
コラット（シルバーブルー）
A single small kitten Korat, Silver Blue sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
エキゾチックショートヘア（キャリコ）
A single small kitten Exotic Shorthair, Calico sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
日本猫（和猫）（茶トラ白）
A single small kitten Japanese Domestic Cat, Orange Tabby and White sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
見上げる角度をもう少し上げたい方向けプロンプト
もう少し顔の角度を高くして、より「見上げてる」感じにしたい方は、以下のプロンプトをお試しください
A single small kitten [breed and coat] indoors, sitting and looking upward with a bright, curious expression. The kitten’s head is tilted higher than usual, emphasizing the upward gaze. One ear stands tall in crisp focus, the other naturally visible. The mouth curves slightly upward at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, unobstructed by objects or other animals. Soft warm indoor lighting, detailed realistic fur texture, and a simple unobtrusive background.
日本語訳：室内で、小さな（任意の品種と毛色の）子猫がちょこんと座り、明るく好奇心たっぷりの表情で上を見上げている。子猫は通常より少し高めに頭を傾けており、その上目づかいが強調されている。片方の耳はくっきりと立っていて、もう片方の耳も自然に見えている。口元はわずかに上がり、やわらかく注意深い表情をつくっている。子猫の頭と上半身の横からの全体が、物やほかの動物に遮られることなくはっきり見えている。室内のあたたかい柔らかな光、リアルで細かな毛並みの質感、そしてシンプルで邪魔にならない背景が特徴。
長毛種の描写について
メインクーンやサイベリアンのような長毛種は、AIの特性上、毛色（特にタビー柄）を指定するとイエネコのような短毛品種に強引に描き直す事象が発生します。
そのため、長毛種用に基本プロンプトを若干アレンジしてみます。
A single small kitten [BREED: replace here], long-haired sitting indoors, looking upward with a bright and curious expression.
The kitten’s long fur is clearly emphasized: visibly fluffy, voluminous, with soft, flowing strands around the cheeks, neck, chest, and tail.
One ear stands tall and in crisp focus, the other ear naturally visible.
The mouth has a slight upward curve at the corners, giving a soft, attentive look.
The full side profile of the kitten’s head and upper body is unobstructed.
Soft warm indoor lighting, highly detailed realistic long-hair texture, gentle shadows, simple unobtrusive background.
Focus on long fur accuracy, maintaining kitten proportions and the upward-looking pose.
- ポーズの記述を動かしていない
- sitting
- looking upward
- bright, curious expression
- slight upward curve of the mouth
- full side profile
- one ear tall & crisp
→ 全部そのまま。
- sitting
- 長毛要素は“別レイヤー扱い”にしている
- long fur をポーズ文とは別の段落で強調
- 部位（cheeks, neck, chest, tail）を指定することで短毛化を回避
→ 構図を壊さず長毛を足す“安全な付け足し”
- “Focus on long fur accuracy”で優先順位を微調整
- ポーズより強くはしないように配慮、表情の潰れ等の影響を回避
ノルウェージャンフォレストキャット（毛色指定なし）
A single small long-haired Norwegian Forest kitten sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, voluminous detailed realistic fur texture, simple and unobtrusive background.
ノルウェージャンフォレストキャット（クリームタビー）
A single small kitten Norwegian Forest Cat, Cream Tabby, long-haired sitting indoors, looking upward with a bright and curious expression. The kitten’s long fur is clearly emphasized: visibly fluffy, voluminous, with soft, flowing strands around the cheeks, neck, chest, and tail. One ear stands tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is unobstructed. Soft warm indoor lighting, highly detailed realistic long-hair texture, gentle shadows, simple unobtrusive background. Focus on long fur accuracy, maintaining kitten proportions and the upward-looking pose.
メインクーン（毛色指定なし）
A single small long-haired Maine Coon kitten sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, voluminous detailed realistic fur texture, simple and unobtrusive background.
メインクーン（レッドタビー）
A single small kitten Maine Coon, Red Tabby, long-haired sitting indoors, looking upward with a bright and curious expression. The kitten’s long fur is clearly emphasized: visibly fluffy, voluminous, with soft, flowing strands around the cheeks, neck, chest, and tail. One ear stands tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is unobstructed. Soft warm indoor lighting, highly detailed realistic long-hair texture, gentle shadows, simple unobtrusive background. Focus on long fur accuracy, maintaining kitten proportions and the upward-looking pose.
別のプロンプトでもタビー柄での描写してみました。
A single small Maine Coon kitten, Red Tabby, sitting indoors. The kitten looks upward with a bright, curious expression. One ear stands tall in crisp focus, the other naturally visible. The mouth curves slightly upward at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, unobstructed by objects or other animals. Soft warm indoor lighting enhances detailed realistic fur texture against a simple, unobtrusive background. The kitten has long, voluminous fur with a lion-like mane around the neck and chest, prominent lynx tips on the ears, and a fluffy body coat that clearly reflects the Maine Coon breed’s long-haired characteristics. The red tabby pattern is visible through the long fur, with natural striping and color variation.
A long-haired Maine Coon kitten, Red Tabby, sitting indoors. The kitten has thick, voluminous fur with a lion-like mane around the neck and chest, and prominent lynx tips on the ears. The red tabby pattern is visible through the long fur, with natural striping and color variation. The kitten looks upward with a bright, curious expression. One ear stands tall in crisp focus, the other naturally visible. The mouth curves slightly upward at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, unobstructed by objects or other animals. Soft warm indoor lighting enhances the realistic fur texture against a simple, unobtrusive background.
サイベリアン（毛色指定なし）
A single small long-haired Siberian kitten sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, voluminous detailed realistic fur texture, simple and unobtrusive background.
サイベリアン（茶トラ＋白）
A single small kitten Siberian, brown tabby and white, long-haired sitting indoors, looking upward with a bright and curious expression. The kitten’s long fur is clearly emphasized: visibly fluffy, voluminous, with soft, flowing strands around the cheeks, neck, chest, and tail.
One ear stands tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is unobstructed. Soft warm indoor lighting, highly detailed realistic long-hair texture, gentle shadows, simple unobtrusive background. Focus on long fur accuracy, maintaining kitten proportions and the upward-looking pose.
サイベリアン（トービー（トーティ＋タビー））
A single small kitten Siberian, Torbie (Tortoiseshell Tabby), long-haired sitting indoors, looking upward with a bright and curious expression. The kitten’s long fur is clearly emphasized: visibly fluffy, voluminous, with soft, flowing strands around the cheeks, neck, chest, and tail. One ear stands tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is unobstructed. Soft warm indoor lighting, highly detailed realistic long-hair texture, gentle shadows, simple unobtrusive background. Focus on long fur accuracy, maintaining kitten proportions and the upward-looking pose.
かなりチャレンジングな組み合わせでしたが、何とかここまでは描写できました。
別プロンプトで、どこまで描写できるか試してみました。
A single small Siberian kitten with a voluminous dense double coat, sitting indoors, looking upward with a bright, curious expression. The kitten has a mix of orange, black, and cream fur patterns with faint, subtle stripes blended into the long fur. One ear with prominent long tufts stands tall and in crisp focus, the other naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, highlighting the thick ruff around the neck and fluffy tail. Soft warm indoor lighting, detailed realistic long fur texture, simple and unobtrusive background.
ミヌエット（ナポレオン）（ホワイト＆グレー）
A single small kitten Minuet, White and Gray, long-haired sitting indoors, looking upward with a bright and curious expression. The kitten’s long fur is clearly emphasized: visibly fluffy, voluminous, with soft, flowing strands around the cheeks, neck, chest, and tail. One ear stands tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is unobstructed. Soft warm indoor lighting, highly detailed realistic long-hair texture, gentle shadows, simple unobtrusive background. Focus on long fur accuracy, maintaining kitten proportions and the upward-looking pose.
A photorealistic image of a single small Minuet kitten, white and gray, sitting indoors. The kitten has a thick, fluffy long-haired coat typical of the breed, with voluminous fur around the neck, chest, and tail. Its face is round and doll-like, with large, expressive eyes and a short nose. The kitten looks upward with a bright, curious expression. One ear stands tall in crisp focus, the other ear naturally visible. The mouth curves slightly upward at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, unobstructed by objects or other animals. Soft warm indoor lighting enhances the realistic fur texture and depth. The background is simple and unobtrusive, ensuring full focus on the kitten’s features.
ペルシャ（ドールフェイス）（ゴールデン）
A single small kitten Persian (Doll Face), Golden, long-haired sitting indoors, looking upward with a bright and curious expression. The kitten’s long fur is clearly emphasized: visibly fluffy, voluminous, with soft, flowing strands around the cheeks, neck, chest, and tail. One ear stands tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is unobstructed. Soft warm indoor lighting, highly detailed realistic long-hair texture, gentle shadows, simple unobtrusive background. Focus on long fur accuracy, maintaining kitten proportions and the upward-looking pose.
最後に
見上げる横顔の子猫は、ただ可愛いだけでなく、未来を見つめるような希望や好奇心を感じさせてくれます。
品種や毛色ごとに異なる個性が、プロンプトに命を吹き込み、作品に深みを与えます。
ぜひこの20選を参考に、あなたの創作にぴったりの子猫を見つけてください。
きっと心に残る一枚が生まれるはずです。
🐾この記事が参考になったら
SNSでシェアしてもらえると嬉しいです！
他にも「いたずら」「お昼寝」「兄弟猫」などのテーマでも紹介中。
📌 あなたのお気に入りプロンプトや、こんな子猫が見たい！というリクエストがあればコメントでぜひ教えてください！
ぜひブックマークして、また遊びに来てくださいね。
次回もどうぞお楽しみに！
（参考）デボンレックスの片耳欠損問題
今回ご紹介した基本プロンプトでデボンレックスをChatGPTで生成すると、極めて高確率で片耳が欠損します。
なぜ、デボンレックスだけが破綻したのか。理由は、次の3点が同時に重なったためです。
（参考）デボンレックスだけが破綻しやすい理由
① デボンレックス特有の「耳の大きさ」
デボンレックスは、他の猫種と比べて
「耳が非常に大きく、頭部が小さい」
という特徴があります。
AI（特にDALL・E）はこの特徴を強く認識しているため、横顔構図＋上向き視線になると「耳がフレームに収まりきらない」と判断しやすくなります。
② 基本プロンプトの「片耳を強調する指定」
基本プロンプトには、
one ear prominently standing tall and in crisp focus
という指定があります。
これは多くの猫種では問題になりませんが、デボンレックスの場合、
- 片方の耳を強く優先して描写
- もう片方の耳の優先度が下がる
という挙動を引き起こしやすく、結果として片耳がフレーム外に切れてしまうことがあります。
③ ChatGPT Images特有の構図解釈のクセ
同じプロンプトでも、AIモデルによって「構図の解釈」は異なります。
DALL·Eは、特徴的なパーツ（大きな耳など）を画面いっぱいに強調して配置する傾向があり、その結果、デボンレックス × 横顔 × 耳強調の組み合わせで破綻が起きやすくなります。
代替プロンプトで何を変えたのか（ポイント解説）
代替プロンプトでは、猫の特徴そのものは変えず、「耳の扱い方」だけを調整しています。
変更ポイント① 片耳を強調する表現を削除
one ear prominently standing tall and in crisp focus
➡耳の優先順位を意図的につけないことで、両耳をバランスよく描写させています。
変更ポイント② フレーム内に収めることを明示
The kitten’s ears are fully visible and contained entirely within the frame.
➡「耳を強調する」のではなく、「耳がきちんと写っている状態」をゴールとして指定しました。
変更ポイント③ 品種指定・構図・雰囲気は維持
- Devon Rex 指定はそのまま
- 横顔・見上げ構図は維持
- ライティングや質感も変更なし
➡あくまで“微調整”であり、別プロンプトではないという点が重要です。
まとめ
デボンレックスのように耳が非常に大きい猫種では、同じプロンプトや構図であっても、AIモデルによって耳の描写が破綻することがわかりました。
今回は、耳を強調する指定を減らし、「フレーム内に収める」ことを明示することで、破綻の抑制につながりました。
おまけ 長毛種の失敗作
ここからは、長毛種でタビー柄を指示した結果、短毛品種になってしまった例をご紹介します。
どれもCopilotが考えたプロンプトばかりですが、他意はありません。
サイベリアン（トービー）
A single small kitten Siberian, Torbie (Tortoiseshell Tabby) sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
Copilotではサイベリアンの特徴が完全に失われました。Torbieらしさはあまり出ていません（ちょこっと毛色に反映された程度）
ChatGPT Images1.5では多少ふわふわ感は出ているものの、Torbieらしさは出ませんでした。
Copilotで再生成を試みるも、結果はほぼ同じでした。
続いて、Copilotが考えた上記プロンプトの代替案です。
A single small Siberian kitten with long, fluffy fur and a thick ruff around the neck, showing clear breed traits. The coat is tortoiseshell tabby: a mix of warm browns, oranges, and creams with tabby stripes. The kitten is sitting indoors, looking upward with a bright, curious expression. One ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
生成結果がこちら。まずはCopilot。
長毛種らしいふわふわ感が戻り、大幅に改善されましたが、毛色はぼぼ茶トラのtortoiseshell tabbyになりました。
ChatGPT Images1.5ではどうでしょうか。
さっきより毛量が増え、よりふわふわ感が出ましたが、トービーには程遠い結果でした。
続いて、別プロンプトの失敗作です。
A single small long-haired Siberian kitten with a fluffy coat and Torbie (Tortoiseshell Tabby) coloration sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, thick ruff around the neck, broad cheekbones, tufted ears, and detailed realistic long fur texture typical of the Siberian breed. Simple and unobtrusive background.
サイベリアン（バイカラー）
Copilotではほぼキジトラな感じになってしまいましたが、ChatGPTはちゃんとバイカラーになりました。
A single small long-haired Siberian kitten with a fluffy coat in a brown tabby and white coat sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, thick ruff around the neck, broad cheekbones, tufted ears, and detailed realistic long fur texture typical of the Siberian breed. Simple and unobtrusive background.
A single small long-haired Siberian kitten with a fluffy coat and brown tabby and white coloration sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, thick ruff around the neck, broad cheekbones, tufted ears, and detailed realistic long fur texture typical of the Siberian breed. Simple and unobtrusive background.
Copilot、ChatGPTとも前のプロンプトと比べて多少白毛の量が増えました。
サイベリアン（オレンジタビー）
本記事で一番の失敗作。ここで生成された子猫は、顔つき・体格・毛並みともに一般的な短毛種になってしまっていて、サイベリアン特有の特徴がどこにも反映されていません。「リアルな毛並み」「ふわふわした質感」と指定したにもかかわらず、生成された画像では毛の長さが短く、サイベリアンらしい厚みや首周りの飾り毛が不足しています。
A single small kitten Siberian, Red Tabby sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
サイベリアンらしさがないどころの話ではありません。もはや別品種です。
- プロンプトの解釈ミス
- 「Siberian, Red Tabby」という明確な指定があったにもかかわらず、生成エンジンが「Red Tabby（毛色）」に強く引っ張られ、一般的な短毛の赤トラ猫として処理してしまった可能性があります
- 品種指定の優先度が低く扱われた
- 一部の生成モデルでは、毛色やポーズなどの視覚的特徴が優先され、品種の骨格や毛質が軽視される傾向があります
- 内部処理の不一致
- 「リアルな毛並み」「暖かい室内光」などの環境指定は反映されましたが、品種固有の特徴（長毛・骨格・耳の形など）が反映されず、全体として「サイベリアンらしさ」が失われました
こうならないようにプロンプトを改修します。
A single small long-haired Siberian kitten with a fluffy coat and Red Tabby coloration sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, thick ruff around the neck, broad cheekbones, tufted ears, and detailed realistic long fur texture typical of the Siberian breed. Simple and unobtrusive background.
- 品種指定の強化：「Siberian」→「long-haired Siberian kitten with a fluffy coat」
- 毛質の補強：「detailed realistic fur texture」→「detailed realistic long fur texture typical of the Siberian breed」
- 特徴の追加：「thick ruff around the neck」「broad cheekbones」「tufted ears」など、サイベリアン特有の身体的特徴を明示
ノルウェージャンフォレストキャット
A single small kitten Norwegian Forest Cat, Cream Tabby sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
サイベリアン同様、ノルウェージャンフォレストキャットの特徴が完全に失われています。
メインクーン
A single small kitten Maine Coon, Red Tabby sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
メインクーンというにはふわふわが足りない…ChatGPTはどうでしょうか
こちらはふわふわに仕上がりました。
もう少しプロンプトを変えてみましょう。
A single small long-haired Maine Coon kitten, Red Tabby sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, voluminous detailed realistic fur texture, simple and unobtrusive background.
これでメインクーンっぽくなりました
メインクーンのトービー柄を試してみましたが、難易度が高い…
A single small kitten Maine Coon, Torbie (Tortoiseshell Tabby) sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
ミヌエット（ナポレオン）（ホワイト＆グレー）
A single small kitten Minuet, White and Gray sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
Copilotはミヌエットっぽい長毛になりません。短毛の子と言い訳しがたいレベルでした。
ChatGPTは多少ふわふわになりました。
上記プロンプトに、ミヌエットらしいふわふわになるよう、一文追加してみました。
A single small kitten Minuet, White and Gray sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. The kitten has a thick, fluffy coat typical of long-haired Minuet cats, with dense fur around the neck and chest, and a rounded face with large, expressive eyes. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
もうちょっとふわふわ感がほしい…。
ChaatGPTはさらにふわふわになりました。
ペルシャ（ドールフェイス）（ゴールデン）
A single small kitten Persian (Doll Face), Golden sitting indoors, looking upward with a bright, curious expression. The kitten has one ear prominently standing tall and in crisp focus, the other ear naturally visible. The mouth has a slight upward curve at the corners, giving a soft, attentive look. The full side profile of the kitten’s head and upper body is clearly visible, with no objects or other animals obscuring it. Soft warm indoor lighting, detailed realistic fur texture, simple and unobtrusive background.
Copilotはペルシャ猫らしい毛並みのふわふわ感がもう少しほしいです…
ChatGPTはImages 1.5はペルシャっぽくなりませんでしたが、2.0では改善されました。
