【待望アプデ】GPTimage2.5の特徴と威力を徹底検証【無料プロンプト11選】

みなさんこんばんは
こやす69です

とうとう！！とうとう！！
ChatGPTにGPTimage2.5が実装されましたね！！

今回は少しだけGPTimage2.5の解説と
まだ研究中ですが映えるプロンプトを紹介します！！

GPTimage2.5何が変わった？

GPT Image 2.5、これをただのアップデートだと思うとたぶん見誤ります。
今回の本質は、画質の向上ではなく、画像生成AIが“制作ツール化”したことです。

OpenAI公式では、2.5は

• 最大50%高速化

• リファレンス人物の保持力向上

• 部分編集の精度向上

• 複数ターン編集の一貫性向上

が大きな進化点として示されています。
さらにAPIでは、高速なFlareと精度重視のSunburstに分かれ、用途によってモデルを使い分ける時代に入っています。

つまりこれから重要になるのは、
どのAIが一番綺麗かではなく、

• どれだけ人物を固定できるか

• どれだけ狙った箇所だけ修正できるか

• どれだけ速度と品質を使い分けられるか

• どれだけ量産に耐えられるか

このあたりです。
GPT Image 2.5は、その転換点になりそうです。

世界の生成画像AIとの価値観の違い

海外の生成画像AIは、近年かなり「1枚を綺麗に作る」より「同じ人物・商品・デザインを維持しながら編集する」方向に進んでいます。
特にリファレンス画像は、単なる雰囲気参考ではなく、人物のアイデンティティ・衣装・商品・構図を固定するための制作素材として扱われる傾向が強いです。

一方、日本のAI美女界隈では、
「可愛い顔を作る」「同じ女の子を固定する」「服・ポーズ・シチュエーションだけ変える」という需要がかなり大きい。
そのため、日本のユーザー目線では顔の再現性やキャラ固定性能が、海外の一般的な広告・商品制作以上に重要に感じられやすいです。

また海外では、実在人物のリファレンス利用についてDeepfake・肖像・同意への警戒が強く、モデル側の安全対策もこの方向に進んでいます。
そのため今後は、日本のAI美女制作でも「実在人物に似せる」より「完全架空のキャラクターを最初から資産として育てる」方が、長期的には使いやすくなっていく可能性が高いです。

要するに、

世界：編集・商用・一貫性重視
日本のAI美女界隈：可愛さ・顔固定・キャラ運用重視

この違いを理解しておくと、GPT Image 2.5の進化がかなり理解しやすくなります。

この続きは後日別の記事でまとめようと思っています。

何が伝えたいかというと
【AI画像のトレンドは数年後早ければ数か月後変化していく可能性がある】
という事です。

GPTimage2.5の威力

ここからはGPTimage2.5の単純な威力を検証していきます。
まずは特別に何も弄っていない状態からどんな画像がでるか…

先に話しておくと…
解像度はかなり上がった
しかし
光の強度や調整が難しくなった

考察にはなりますが背景のリアルさ、解像度が上がったせいで
被写体の見せ方が難しくなったと感じます

検証画像・プロンプト

①従来の光の設定でグラビアっぽく作ってみた

A photorealistic vertical smartphone selfie of a completely fictional 20-year-old adult Japanese woman, clearly adult, not resembling any real person, celebrity, influencer, model, or idol.

She has an extremely cute Japanese idol-like face with soft youthful-adult features, a small rounded face, gentle cheeks, large natural dark-brown eyes mostly hidden beneath the shadow of her cap, a small natural nose, soft pink lips, realistic facial asymmetry, visible natural skin texture and no beauty-filter look. Very slim petite figure, narrow shoulders, delicate arms, slim waist and naturally flat abdomen.

She has very long platinum-blonde hair divided into two low pigtails, tied loosely with small dark hair ties. Fine strands fall naturally across both sides of her face and chest.

She wears a black oversized trucker-style baseball cap pulled low over her forehead, with large bold white block lettering across the front reading "DSQUARED2". The brim strongly shades her eyes and upper face.

She wears a fitted white short-sleeve graphic T-shirt, slightly stretched and wrinkled naturally across the torso, covered with multiple lines of large messy black sans-serif typography. The shirt is gathered and tied into a small knot near her right hip, shortening the hem and exposing her slim lower abdomen and navel. White low-rise bikini bottoms are visible at the bottom of the frame.

POSE AND CAMERA:
A casual one-handed selfie photographed from very close range with a smartphone held high and slightly to her right side, creating a steep downward diagonal perspective. Her right arm extends outward toward the camera and partially leaves the frame. Her head is tilted slightly downward so the cap dominates the upper center of the composition. She looks downward toward the phone screen with a quiet relaxed expression and slightly parted lips.

Her left arm is raised beside her head, elbow bent outward. Her left hand floats casually beside the brim of the cap, fingers loosely separated in an imperfect playful gesture, almost like an unfinished peace sign. Her torso leans slightly forward and twists subtly toward the camera.

COMPOSITION:
Vertical 3:4 candid selfie framing. Extremely close perspective. The cap and head occupy the upper center, her torso fills most of the middle frame, and her exposed waist and the upper edge of the white bikini bottoms appear near the bottom. Slight wide-angle smartphone distortion makes the arm closest to the camera appear larger.

LOCATION:
She is sitting or crouching inside a small outdoor rooftop jacuzzi or compact plunge pool. A white plastic slatted edge curves around the lower-right and lower-left parts of the frame. Pale turquoise bubbling water is visible immediately around her.

Behind her is a high rooftop glass railing overlooking a coastal marina. Far below are calm blue-gray harbor water, rows of floating docks, several small white yachts and boats, waterfront buildings, distant dark green hills and a hazy shoreline.

LIGHTING:
Strong late-afternoon sun directly behind and above her, producing intense backlighting, blown highlights on the harbor water, bright shimmering reflections and several long diagonal lens-flare streaks crossing the image. Her face remains partially underexposed beneath the cap while the blonde hair catches bright translucent rim light.

REAL SHOT aesthetic, casual influencer vacation selfie, imperfect spontaneous framing, iPhone-style photography, realistic wide-angle distortion, slight exposure imbalance, slightly washed highlights, mild sensor grain, natural skin pores, subtle compression, realistic hair flyaways, realistic fabric tension and wrinkles, no studio lighting, no HDR, no glossy commercial retouching, no artificial skin smoothing, no CGI look.

やっぱり被写体の見せ方が難しくなった気がします。
ベータ版で僕が検証したときもそうですが、今までは被写体にスポットが上がっていた。
しかしGPTimage2.5は全体にスポットが当たっている。

なので自然に見えるかもですが…
次はグラビアっぽく映え写真にしてみます。

②インスタ映え（これやべぇ…）

A photorealistic vertical fashion portrait of a completely fictional 20-year-old adult Japanese woman, clearly adult, not resembling any real person, celebrity, actress, model, idol, or influencer.

She has an extremely cute Japanese idol-like face with a small softly rounded adult face, gentle cheeks, large dark-brown slightly downturned eyes, a small natural nose, soft pink lips, subtle rosy blush, realistic adult facial anatomy, natural facial asymmetry, visible pores and fine skin texture. She looks directly toward the camera with a shy, gentle closed-mouth smile.

She has very long straight dark-brown to nearly black hair reaching well below her chest, with soft straight bangs lightly separated across her forehead. Fine strands fall naturally around her cheeks.

A large ornate silver butterfly hair clip is attached high above one temple. The accessory has intricate metallic butterfly wings, delicate filigree details, small sparkling crystals and rhinestones, and tiny dangling jewel accents. It is clearly visible and acts as a strong decorative focal point while remaining naturally integrated into her hair.

OUTFIT:
She wears a black sporty feminine zip-up top with a slightly cropped silhouette, oversized long sleeves, broad white ribbed cuffs and narrow white piping running horizontally across the chest and sleeves. A small delicate white bow embroidery appears near one side of the chest. The front zipper is partially closed.

She wears a high-waisted black mini skirt with smooth structured fabric and a subtle flared A-line silhouette.

Bare legs and bare feet, no shoes, no socks.

POSE:
She is sitting directly on a highly reflective mirrored floor.

Her hips are positioned toward the left side of the image while both legs extend diagonally across the composition toward the lower-right foreground.

Both knees are softly bent. One thigh overlaps slightly in front of the other, creating a layered diagonal leg composition.

Her lower legs extend toward the camera, and both bare feet rest close together near the bottom-right corner of the image. Feet are relaxed naturally, with realistic toe spacing.

Her torso remains upright with a very slight forward lean.

Both arms are lifted beside her head. Her elbows point outward. Both hands are placed lightly beside and behind her ears, gently touching and adjusting her hair.

Her oversized sleeves bunch naturally around the wrists.

Her head is tilted slightly toward one shoulder while maintaining direct eye contact with the camera.

CAMERA AND COMPOSITION:
Vertical 3:4 portrait.

Camera positioned approximately 1.5–2 meters from the subject, slightly above her seated eye level and angled gently downward.

The woman occupies mostly the left and central portions of the frame.

Her face appears in the upper-left-center area.

Her long legs create a strong diagonal visual line from the center toward the lower-right corner.

Her entire seated body is visible from head to bare feet.

Moderate smartphone-style wide-angle perspective, approximately 26–28mm equivalent. The legs and feet closest to the camera appear slightly larger and longer due to realistic perspective distortion, without exaggerated anatomy.

The mirrored floor creates an especially clear reflection of her legs, bare feet, black clothing and surrounding flowers directly beneath her.

ENVIRONMENT:
An immersive indoor floral art installation completely surrounded by mirrors.

Hundreds of tropical flowers and hanging plants fill the space from ceiling to floor.

Purple orchids, magenta orchids, pale pink orchids, white orchids, clusters of tiny yellow flowers, long green leaves, exposed aerial roots and hanging moss surround the woman.

Large mirrored wall panels and mirrored floor panels multiply the floral installation repeatedly, creating an almost infinite flower-garden effect.

Geometric seams between the mirror panels remain visible across the floor and walls.

Her reflection is especially prominent beneath her body, showing an inverted reflection of her legs, bare feet, black skirt and jacket surrounded by reflected orchids.

Some extremely distant visitors may appear only as tiny fragmented reflections deep inside the mirrored background, but the woman remains the clear main subject.

LIGHTING:
Bright natural-looking exhibition lighting with soft daylight-like illumination.

Irregular patches of stronger light fall across her thighs and lower legs while parts of her black clothing remain softly shaded.

Small sparkling highlights appear on the silver butterfly hair clip and crystal decorations.

Bright specular reflections appear across the mirrored floor.

Natural warm skin tones with soft luminous highlights while retaining realistic pores and texture.

COLOR:
Rich green foliage, purple and pink orchids, small yellow flowers, bright white floral accents, deep black clothing and warm natural skin.

REAL SHOT aesthetic, candid Japanese idol-style off-shot, natural smartphone photography, slightly imperfect framing, realistic perspective, subtle sensor texture, visible skin pores, tiny imperfections, natural individual hair strands, realistic fabric folds, realistic leg and foot anatomy, moderate depth of field, crisp natural detail, no beauty filter, no skin smoothing, no plastic skin, no HDR, no CGI, no anime, no illustration, no excessive commercial retouching.

いやこれやばくないですか？ｗ

• 光が均一じゃない：太腿だけ明るい、黒服は少し暗い、鏡には点状のハイライト、という照明ムラがある。AI画像にありがちな全身均一照明を避けてる。

• スマホっぽい画角：26–28mm相当＋軽い俯瞰＋手前の脚が少し大きい。この軽いパース歪みが「撮った写真感」をかなり強くしてる。

• 綺麗すぎる処理を明示的に消してる：no beauty filter, no skin smoothing, no HDR, no excessive commercial retouching が効いてる。毛穴そのもの以上に、加工写真っぽさを消しているのが重要。

この辺りがきのリアルさに近づけそうです。
更に同じテイストでやってみます。

③コインランドリーで待つ女性

A photorealistic natural vertical smartphone photo of a completely fictional 20-year-old adult Japanese woman, clearly adult, not resembling any real person, celebrity, actress, model, idol, or influencer.

She has an extremely cute Japanese idol-like face with a small softly rounded adult face, soft cheeks, large natural dark-brown eyes, a small natural nose, soft pink lips, realistic facial asymmetry, visible pores, faint under-eye fullness, and natural skin texture without any beauty-filter look. Her expression is quiet and slightly tired but gentle, with a subtle closed-mouth smile.

She has medium-long dark brown hair tied loosely into a low ponytail, with soft see-through bangs and a few loose strands falling around her cheeks and neck. A few slightly frizzy flyaway hairs are visible under indoor light.

BODY AND STYLING:
She has a very slim petite frame with narrow shoulders, delicate arms, slim legs, and natural proportions.

She wears a light gray oversized zip hoodie, unzipped casually over a plain fitted white ribbed tank top. The hoodie sleeves are slightly too long and bunch naturally around her wrists. She also wears loose black athletic shorts with a relaxed fit. Bare legs are visible. On her feet are simple white ankle socks and slightly worn white sneakers with natural creases.

POSE:
She is sitting sideways on a molded plastic chair inside a small Japanese coin laundry at night.

Her body is angled slightly toward the right side of the frame while her face turns back toward the camera.

One leg is bent with the foot planted naturally on the floor, and the other leg stretches slightly forward in a relaxed casual way.

One elbow rests loosely on the top of a laundry basket beside her, and one hand lightly holds the handle of the basket.

Her other hand is raised near her hoodie collar, gently pinching the fabric as if adjusting it.

Her shoulders are relaxed, and her posture is casual and natural, like a real off-guard moment while waiting for laundry.

CAMERA AND COMPOSITION:
Vertical 3:4 smartphone photograph.

The camera is positioned at about chest height, around 1.5 meters away, slightly off-center, creating a natural candid framing.

The woman occupies the center-left of the frame.

Her full body is visible from head to shoes.

The foreground includes part of a white plastic laundry basket with folded clothes slightly spilling over the edge.

The composition should feel like a real snapshot, not a formal portrait.

ENVIRONMENT:
A small late-night Japanese coin laundry.

Behind her is a row of front-loading washing machines and dryers with round glass doors, metallic rims, sticker labels, control panels, coin slots, and small scuff marks from real use.

Some machines contain visible laundry in motion behind the round glass windows.

One dryer window shows clothes softly blurred from spinning.

There are laminated instruction sheets and small machine number stickers on the machines.

The tiled floor is slightly glossy and reflects light faintly.

A vending machine or detergent shelf is partially visible near the side or back of the frame.

A glass storefront window reveals a dark rainy street outside, with blurred reflections of traffic lights, faint car headlights, wet pavement, and a few raindrops sticking to the glass.

A small umbrella stand near the entrance contains one transparent vinyl umbrella.

LIGHTING:
Mixed fluorescent indoor lighting with slight greenish-white cast, combined with dim warm-orange streetlight reflections coming from outside through the glass.

Lighting is uneven and realistic: her face and hoodie are lit from overhead fluorescent panels, while parts of the background fall into softer shadow.

The machine windows catch small circular highlights.

The glass storefront shows faint reflections, and the wet pavement outside creates subtle bright reflected streaks.

STYLE AND REALISM:
REAL SHOT aesthetic, everyday Japanese urban candid photo, highly realistic and grounded.

Emphasize real-camera behavior and real-world imperfections: slight exposure imbalance, mild sensor noise in darker areas, subtle smartphone sharpening, a touch of compression, natural indoor color cast, realistic fabric wrinkles, realistic shoe creases, realistic scuff marks on the machines, tiny reflections on metal surfaces, visible individual hair strands, natural pores, slight shadow noise, and a believable lived-in laundromat atmosphere.

The image should feel like an accidentally beautiful late-night snapshot taken by a friend while she waits for laundry.

No studio lighting, no glamour retouching, no beauty filter, no HDR look, no plastic skin, no CGI look, no anime, no illustration, no excessive stylization.

う～ん。違うなぁ…
もう少し抗ってみます。
やっぱ水着を…

④プールサイドの日本人女性

A photorealistic natural vertical smartphone photo of a completely fictional 20-year-old adult Japanese woman, clearly adult, not resembling any real person, celebrity, actress, model, idol, or influencer.

She has an extremely cute Japanese idol-like face with a small softly rounded adult face, soft cheeks, large natural dark-brown eyes, a small natural nose, soft pink lips, faint under-eye fullness, realistic facial asymmetry, visible pores, and natural skin texture with no beauty-filter look. Her expression is bright but gentle, with a soft relaxed smile directed toward the camera.

She has long dark-brown hair tied into a slightly loose high ponytail, with soft see-through bangs and a few wispy strands sticking lightly to her cheeks and neck from heat and moisture. A few flyaway hairs catch the sunlight naturally.

BODY AND STYLING:
She has a very slim petite frame with narrow shoulders, delicate arms, a slim waist, natural proportions, and softly toned legs.

She wears a simple white triangle bikini with thin halter straps and side-tie bottoms. The bikini fits naturally with realistic fabric tension, slight wrinkles, and subtle shadows. No jewelry except for one thin delicate bracelet on one wrist.

POSE:
She is standing casually at the edge of an outdoor pool, near the poolside walkway.

Her body is angled slightly three-quarters toward the camera.

One leg bears most of her weight while the other leg is relaxed and slightly bent forward.

One hand is lifted near the back of her head, lightly touching or adjusting her ponytail.

Her other arm hangs naturally by her side, with the hand softly relaxed near her thigh.

Her shoulders are relaxed, and her posture feels like a natural off-guard poolside snapshot rather than a formal modeling pose.

CAMERA AND COMPOSITION:
Vertical 3:4 smartphone photograph.

The camera is positioned at about chest height, around 1.5 to 2 meters away, with a slight downward angle, creating a casual candid feel.

Her full body is visible from head to feet.

She occupies the center of the frame, with a little extra space above her head and visible poolside surroundings around her.

Use a realistic smartphone perspective, slightly wide but not exaggerated.

ENVIRONMENT:
A real outdoor Japanese leisure pool in summer.

She stands beside a bright blue swimming pool with shimmering water and sun reflections.

Visible poolside details include pale concrete tiles, a white plastic lounge chair, a folded towel, stainless pool ladder rails, safety rope floats, and a few blurred swimmers in the distance.

In the background are low greenery, poolside umbrellas, and parts of a resort-like facility or water park structure.

The setting should feel like a normal daytime public pool, not a studio set.

LIGHTING:
Strong natural summer daylight.

The sunlight is slightly harsh and direct, creating realistic contrast, bright highlights on her shoulders and legs, and soft but defined shadows under her chin, arms, and along the poolside ground.

Her skin has a lightly sunlit glow with realistic tonal variation, not airbrushed.

The pool water throws subtle reflected light upward onto her legs and lower torso.

STYLE AND REALISM:
REAL SHOT aesthetic, everyday Japanese poolside candid photo, highly realistic and grounded.

Emphasize real-camera behavior and physical detail: slight exposure imbalance, mild smartphone sensor grain in shadow areas, subtle sharpening, tiny compression artifacts, realistic wet-looking hair strands, natural skin texture, visible pores, tiny imperfections, natural fabric folds, realistic poolside reflections, and believable public-pool atmosphere.

The image should feel like an accidentally beautiful summer snapshot taken by a friend during a break at the pool.

No studio lighting, no glamour retouching, no beauty filter, no HDR look, no plastic skin, no CGI look, no anime, no illustration, no excessive stylization.

⑤グラビア雑誌風

A photorealistic vertical close-up summer portrait of a completely fictional Japanese woman in her mid-20s, clearly an adult, not resembling any real person, celebrity, actress, model, idol, or influencer.

FACE — VERY IMPORTANT:
She has an exceptionally cute Japanese idol-inspired adult face with a small compact oval face, a short-looking midface, softly rounded cheeks, a delicate narrow jaw, a small softly rounded chin, large clear dark-brown eyes, natural double eyelids, slightly downturned outer eye corners, subtle lower-eyelid fullness, a small low-to-moderate nose bridge, a softly rounded nose tip, and naturally soft pink lips.

Her facial proportions should feel distinctly Japanese and idol-like rather than Westernized or model-like.

Her eyes are large but anatomically realistic, moist and reflective, with soft natural catchlights.

Her cheeks have gentle fullness while the jaw remains delicate.

Her expression is quiet, sweet, slightly shy, and relaxed, with a tiny closed-mouth smile and direct eye contact with the camera.

Avoid a mature glamorous face, strong cheekbones, sharp jawline, prominent nose bridge, heavy makeup, Western facial proportions, or overly sculpted features.

SKIN:
Fair natural Japanese skin with soft warm undertones.

Extremely realistic skin detail:
visible pores,
tiny natural blemishes,
subtle uneven coloration,
very fine peach fuzz,
slight cheek redness,
natural under-eye texture,
tiny highlights from perspiration,
and realistic variation between illuminated and shaded skin.

The skin should look soft and youthful-adult but never airbrushed or plastic.

HAIR:
Dark brown hair gathered into a low ponytail behind the head.

Full soft straight bangs spread naturally across the forehead, slightly uneven and separated into many fine strands.

Two longer side strands fall beside the cheeks and jawline.

A few loose wispy hairs cross the temple, cheek, and neck.

Hair should have realistic density, individual strands, small flyaways, slight irregularity, and subtle warm highlights from sunlight.

OUTFIT — MATCH THIS CLOSELY:
She wears a pale blush-pink lace two-piece swimsuit top.

The top has:
soft pale pink floral lace,
structured lightly padded cups,
thin satin-like pale pink shoulder straps,
delicate lace texture covering the cups,
a softly curved upper cup line,
and subtle realistic fabric tension.

The lace pattern is fine and feminine, with visible floral embroidery and tiny mesh openings.

The shoulder straps are thin and clearly visible.

The swimsuit should look like elegant Japanese gravure-style swimwear rather than a sporty bikini.

Realistic seams, stitching, lace texture, slight wrinkles, soft shadows, and natural fabric behavior.

POSE:
She is reclining deeply into a warm rust-orange woven outdoor lounge chair.

Her upper back and right shoulder rest against the angled chair.

Her torso is rotated slightly toward the camera rather than facing straight forward.

One arm is raised above and behind her head, elbow strongly bent upward and extending toward the upper-left corner of the frame.

The raised upper arm creates a large diagonal shape behind the left side of her face.

Her other arm remains lower beside her body and mostly outside the visible frame.

One knee is bent very close to the camera and enters prominently from the lower-left foreground.

The foreground knee and upper leg are large because of perspective and partially out of focus.

Her body forms a relaxed diagonal from the lower-left foreground toward the upper-right where her face is located.

CAMERA ANGLE — CRITICAL:
Vertical 3:4 image.

Very close-range composition.

Camera positioned above her body and slightly to her left side, looking diagonally downward toward her face and upper torso.

The camera is not directly overhead.

The lens is approximately 35–40mm equivalent.

Her face sits in the upper-right third of the frame.

Her raised arm fills much of the upper-left area.

Her bent knee fills much of the lower-left foreground.

Her upper torso occupies the center and lower-right portions of the composition.

The perspective should create strong depth:
foreground knee large and softly blurred,
upper torso in mid-distance,
face sharply focused farther back.

The image should feel like the photographer is standing very close beside the lounge chair and leaning slightly over her.

LIGHTING:
Strong natural summer sunlight coming from the upper-left side.

The light is irregular and partially overexposed, exactly like real outdoor photography.

Bright sunlight falls across:
the raised arm,
sections of the upper chest,
one shoulder,
and the foreground leg.

The face remains more evenly exposed with soft warm fill light.

One side of the face has slightly cooler soft shadow.

Small highlights appear naturally in the eyes, lower eyelids, nose, lips, and individual hair strands.

Some bright areas of skin approach highlight clipping.

Warm reflected orange light from the lounge-chair fabric subtly affects the shadows.

A faint cooler blue cast is visible in some shadowed areas.

Do not use clean studio-style lighting.

ENVIRONMENT:
A bright outdoor poolside or summer resort environment.

The background is mostly soft and out of focus because of the extremely close composition.

Only abstract hints of pale blue sky, bright cream architectural surfaces, sunlight, and warm resort tones should be visible.

The rust-orange woven lounge-chair upholstery remains clearly visible behind her right shoulder and along the right edge of the frame.

REALISM:
Ultra-realistic Japanese summer photography.

Natural optical depth.
Realistic perspective compression.
Fine skin texture.
Individual eyelashes.
Natural moisture in the eyes.
Tiny uneven skin details.
Fine facial hairs.
Individual hair strands.
Slightly imperfect autofocus.
Subtle lens softness.
Very mild digital sensor texture.
Natural highlight bloom.
Slight exposure imbalance.
Realistic color variation.
Natural fabric texture.
Realistic lace detail.

The final result should feel like a real professional Japanese summer portrait photograph captured outdoors, not an AI-generated beauty image.

ABSOLUTELY NO TEXT.
NO JAPANESE CHARACTERS.
NO ENGLISH TEXT.
NO NUMBERS.
NO MAGAZINE TITLE.
NO CAPTIONS.
NO LOGO.
NO WATERMARK.
NO GRAPHIC DESIGN.
NO TYPOGRAPHY.
NO BORDER.

No beauty filter.
No plastic skin.
No excessively mature face.
No Westernized facial proportions.
No sharp fashion-model face.
No heavy makeup.
No HDR.
No CGI.
No anime.
No illustration.
No excessive retouching.

う～ん。。。ここまでプロンプトを長くしないといけないのか…
といまかなり困惑しています。
今は皆さんにも再現してもらいたいのでプロンプトを弄らずに載せてみました。

⑥ベッドに寝そべった女性

A photorealistic close-up portrait of a completely fictional Japanese woman in her mid-20s, clearly an adult and not resembling any real person, celebrity, actress, model, idol, or influencer.

She is lying comfortably on her back on soft white bedding, photographed from directly above at very close range. Her body runs diagonally across the frame from the lower-left toward the upper-right, while her head rests toward the right side of the image. The composition feels slightly rotated and unconventional, like a candid photograph taken while standing beside the bed.

FACE:
An exceptionally cute Japanese idol-inspired adult face with a small softly rounded oval shape, short-looking midface, gentle full cheeks, delicate jawline, small chin, large natural dark-brown eyes, subtle natural double eyelids, softly defined lower eyelids, a small low-to-moderate nose bridge, rounded nose tip, and soft natural pink lips.

Her expression is calm, quiet, and slightly dreamy. Her lips are gently closed and relaxed. She looks directly toward the camera with soft neutral eye contact rather than a broad smile.

Keep the face distinctly Japanese, delicate and approachable rather than glamorous or heavily sculpted.

Natural adult facial anatomy, realistic asymmetry, visible pores, faint under-eye texture, tiny skin imperfections, subtle cheek redness, and fine facial hairs.

HAIR:
Medium-long dark brown hair spread loosely across the white bedding around her head.

Soft wispy bangs fall naturally across her forehead.

Several thin strands rest against her cheeks, temples, neck, and pillow.

The hair should look slightly messy from lying down, with realistic overlapping strands, tiny flyaways, subtle shine, and irregular texture.

OUTFIT:
She wears a pale dusty lavender-blue lace two-piece swimwear top with a soft feminine design.

The top has delicate floral lace texture, lightly structured cups, thin shoulder straps, subtle scalloped lace edges, and soft muted pink-lavender floral accents woven into the fabric.

The fabric should look realistic and tactile, with fine mesh texture, visible stitching, subtle fabric tension, tiny wrinkles, and natural shadows.

POSE:
She lies flat and relaxed on the white bed.

One arm is raised above her face, bent at the elbow.

The raised hand floats delicately near her eye and upper cheek, with the index finger pointing gently downward beside the outer eye area. The fingers are loose and naturally curved rather than forming a rigid gesture.

Her other arm is bent beside her head, with the hand resting lightly near her hair and temple.

Both elbows remain outside or near the edges of the frame, creating a relaxed symmetrical upper-body composition.

Her shoulders remain flat against the bedding.

CAMERA AND COMPOSITION:
Close overhead photograph.

Landscape 4:3 composition.

Camera positioned approximately 70–100 cm directly above her upper body.

The frame includes her head, shoulders, upper torso, both raised arms and hands, and only a small amount of surrounding bedding.

Her face is positioned slightly right of center.

Her upper torso occupies the left and lower-left portion of the frame.

The image should feel naturally rotated about 20–30 degrees rather than perfectly aligned with the frame.

Use approximately a 40–50mm equivalent perspective to avoid excessive wide-angle distortion.

The face is the sharpest focal point, especially the eyes, while the far edges of the hair and bedding soften slightly.

LIGHTING:
Very soft bright natural daylight entering from a nearby window.

Large diffuse light spreads across her face, neck, shoulders, and upper torso.

Lighting is gentle and slightly high-key, with pale cream highlights and very soft gray-blue shadows.

Do not use dramatic directional lighting.

Small natural highlights appear in her eyes, lips, nose, and individual hair strands.

The white bedding reflects soft fill light upward, reducing harsh facial shadows.

Skin remains luminous but realistically textured rather than airbrushed.

BACKGROUND:
Simple soft white bedding filling almost the entire background.

Subtle folds, wrinkles, fabric shadows, and slight tonal variation should remain visible.

No furniture, decorations, text, or distracting objects.

REALISM:
REAL SHOT aesthetic.

Natural Japanese portrait photography with:
visible skin pores,
tiny blemishes,
fine peach fuzz,
natural under-eye texture,
individual eyelashes,
realistic moist eye reflections,
slight uneven skin coloration,
individual hair strands,
subtle focus falloff,
minor exposure variation,
very mild sensor grain,
soft optical detail rather than excessive digital sharpness,
realistic lace texture,
natural bedding wrinkles.

The result should look like a genuine softly lit photograph taken during a quiet indoor portrait session rather than an AI-generated glamour image.

No text.
No logo.
No watermark.
No beauty filter.
No plastic skin.
No excessive skin smoothing.
No heavy makeup.
No exaggerated anatomy.
No HDR.
No CGI.
No anime.
No illustration.
No excessive commercial retouching.

ありですね！！ただ体感ですが生成スピードが速かったのでFlareなのかな？

⑦赤いビキニを着た女性

A photorealistic vertical indoor summer portrait of a completely fictional Japanese woman in her mid-20s, clearly an adult, not resembling any real person, celebrity, actress, model, idol, or influencer.

FACE — VERY IMPORTANT:
She has an exceptionally cute Japanese idol-inspired adult face with a small compact oval shape, softly rounded cheeks, a short-looking midface, a delicate jawline, a small rounded chin, large natural dark-brown eyes, subtle double eyelids, faint lower-eyelid fullness, a small low-to-moderate nose bridge, a softly rounded nose tip, and soft natural pink lips.

Her expression is calm, slightly curious, and softly playful, with direct eye contact toward the camera and gently relaxed lips.

Keep her facial proportions distinctly Japanese, delicate, approachable, and adult-looking rather than glamorous, Westernized, heavily sculpted, or fashion-model-like.

Natural facial asymmetry, visible pores, subtle cheek redness, faint under-eye texture, tiny skin imperfections, fine facial hairs, and realistic skin tone variation.

HAIR:
Dark brown hair tied into a neat low ponytail behind her head.

Soft full bangs fall straight across her forehead, lightly separated into many individual strands.

A few longer side strands frame both cheeks and ears.

The ponytail falls behind one shoulder and remains partially visible along the side of her neck.

Realistic individual hair strands, small flyaways, subtle shine, and slight irregularity.

OUTFIT:
She wears a simple vivid red two-piece recreational swimsuit.

The top has thin shoulder straps, softly structured triangular-curved cups, a clean minimal silhouette, subtle scalloped edging, and realistic fabric tension.

The matching bottoms are only partially visible near the lower edge of the frame.

The swimsuit fabric should show realistic seams, tiny wrinkles, soft shadows, slight texture, and natural interaction with the body.

POSE:
She stands indoors with her upper body angled slightly toward the camera.

Both arms are raised around her head.

Her left arm reaches upward above the top of her head, elbow bent outward, with the hand hovering loosely over her hair.

Her right arm is also raised, elbow pointing outward, with her hand beside the back of her head and fingers forming a loose playful gesture near her ponytail.

Her shoulders are slightly uneven, creating a natural asymmetrical pose.

Her torso has a gentle sideways curve, with one hip subtly shifted to the side.

The pose should feel playful and casual, like a spontaneous indoor portrait rather than a formal fashion pose.

CAMERA AND COMPOSITION:
Vertical 3:4 portrait.

Close upper-body framing from approximately the upper hips or lower waist upward.

Camera positioned around chest-to-face height, approximately 80–120 cm away.

Use a natural 35–45mm equivalent perspective.

Her head appears in the upper-center of the frame.

The raised arms create a broad triangular frame around her face.

Her face remains the primary focal point.

Her upper torso fills most of the middle and lower frame.

Slightly close perspective without extreme wide-angle distortion.

The framing should feel intimate in distance but still natural and editorial rather than overtly posed.

LIGHTING:
Soft warm natural daylight entering from one side of the room, mixed with gentle interior ambient light.

The illumination is slightly uneven and realistic.

One side of her face receives brighter soft light while the opposite cheek remains in mild warm shadow.

Small highlights appear on her eyes, nose, lips, hair, shoulders, and the red swimsuit fabric.

Subtle patches of brighter light fall across one arm and shoulder.

The background falls into softer shadow and gentle blur.

Avoid perfect studio lighting.

ENVIRONMENT:
A warm Japanese-style wooden interior or resort room.

The background contains rich brown wooden walls, beams, door frames, and softly blurred furniture.

A dark rectangular doorway or window area appears in the rear-right background.

Warm reddish-brown and honey-colored wood tones dominate the environment.

The background should be softly out of focus while still showing believable architectural depth.

REALISM:
REAL SHOT aesthetic.

Natural Japanese portrait photography with:
visible skin pores,
tiny blemishes,
slight uneven skin coloration,
fine peach fuzz,
realistic under-eye texture,
individual eyelashes,
moist natural eye reflections,
individual hair strands,
subtle focus falloff,
minor exposure variation,
very mild smartphone or digital-camera sensor texture,
natural optical softness,
realistic fabric texture,
natural shadow transitions,
slight background clutter,
and believable indoor lighting.

The final image should feel like a genuine candid summer portrait photographed indoors by a friend or magazine photographer, not an AI-generated beauty image.

No text.
No logo.
No watermark.
No beauty filter.
No plastic skin.
No excessive skin smoothing.
No heavy makeup.
No exaggerated anatomy.
No HDR.
No CGI.
No anime.
No illustration.
No excessive commercial retouching.

⑧ビキニギャル×ビーチ

A photorealistic vertical beach portrait of a completely fictional Japanese woman in her mid-20s, clearly an adult and not resembling any real person.

She has a very cute Japanese idol-inspired adult face, fair natural skin, large dark-brown eyes, soft pink lips, and very long straight ash-blonde hair with darker roots. Black oversized sunglasses rest on top of her head.

She wears a black two-piece swimsuit with a bold fashion design: a structured black bikini top with a deep central cutout and small silver metallic connector details, paired with simple low-rise black bikini bottoms.

She stands on bright white sand and leans slightly forward toward the camera, creating a casual wide-angle perspective. One arm crosses naturally in front of her lower torso while the other hangs down beside her body. She looks directly at the camera with a calm, slightly playful expression.

Vertical 9:16, close full-body framing, camera slightly below chest level and very near the subject, natural smartphone wide-angle perspective around 24–26mm. Her head and upper torso dominate the frame while her legs extend toward the bottom.

Bright harsh midday beach sunlight, deep blue sky, strong natural shadows, slightly overexposed highlights on skin and sand, subtle wind moving individual hair strands. Low resort buildings and sparse greenery in the distant background.

REAL SHOT, realistic pores, tiny skin imperfections, individual hair strands, natural swimsuit fabric tension, slight smartphone distortion, mild sensor texture, no beauty filter, no skin smoothing, no HDR, no CGI, no text, no watermark.

GPTimage2.0とGPTimage2.5の比較画像

ここからはまだ発表出来てないGPTimage2.0の画像プロンプトをGPTimage2.5で生成してみるとどうなるかの比較画像です。
プロンプトはそのまま使って貰っても大丈夫です。

⑨川で後ろを向くビキニ女性

A photorealistic natural outdoor photo of a fictional 20-year-old adult Japanese woman, completely different from any real person, standing waist-deep in a clear mountain river during daytime. The camera is behind her at a close medium distance, slightly above shoulder level, capturing her back and side profile as she turns her face gently over one shoulder. The composition is natural and candid: her wet back is centered, the river water fills the lower half of the frame, large gray rocks and green forest fill the background, and the water surface has realistic ripples and transparent reflections.

She has a clearly adult, fresh, natural Japanese beauty look with a soft but slightly sporty impression. Her face is seen in side profile, with a gentle nose line, soft lips, natural lashes, subtle makeup, and a calm shy expression as she looks downward toward the water instead of directly at the camera. Her dark brown hair is wet and tied into a loose low ponytail or messy back ponytail, with damp strands falling around her cheek, neck, and forehead. The hair texture is realistic, slightly clumped from water, with natural shine.

Her body is slender, toned, and healthy, with slim arms, lean shoulders, a narrow waist, a smooth back line, and a softly athletic silhouette. Her upper body has a natural balanced shape without exaggerated curves. Her posture is relaxed and elegant, shoulders slightly turned, one arm bent softly near the water, the other arm close to her side, as if she is quietly enjoying the cool river.

She wears a simple pale lavender string bikini seen from the back. The bikini top has thin halter strings tied neatly at the back of the neck in a small bow, and another thin strap tied across the middle of her back in a second small bow. The bikini bottom has thin side strings tied into small bows at both hips, with a simple minimal swimwear design. The swimwear fabric is smooth and wet-looking, with natural tension and small water droplets. The overall look is clean outdoor swimwear photography, natural and tasteful, not provocative.

Clear green-blue river water, smooth stones visible under the water, large gray boulders, deep green forest background, soft overcast daylight, realistic water droplets on skin, natural skin texture, slight imperfections, realistic pores, natural body proportions, shallow depth of field, high-resolution realistic photography, peaceful summer river atmosphere.

⑩ビーチバー×ビキニ美女

Photorealistic vertical summer portrait of a completely fictional adult Japanese woman in her early 20s, clearly adult and not based on any real person. She has a small soft feminine face, fair natural skin, a short blonde bob with slightly darker roots, wispy see-through bangs, and subtly damp textured hair.

She is leaning back naturally against a weathered rustic blue wooden counter at an open-air coastal beach bar. Both arms rest loosely against the counter behind and beside her body. Her face is tilted upward toward the sunlight, eyes gently closed, with a peaceful soft smile, expressing absolute sun-drenched relaxation and effortless summer tranquility.

She wears a turquoise-blue and vivid lime-green horizontal striped ribbed bikini. The bikini top has thin dark navy straps forming a distinctive geometric harness-like structure across the upper chest and around the neck. The matching low-rise bikini bottom uses the same turquoise-and-lime striped ribbed fabric with thin dark navy side straps. A delicate white cowrie-shell choker rests around her neck.

Intense midday coastal sunlight falls directly across her face and body, producing bright natural highlights and clearly directional shadows. Her skin shows realistic pores, subtle texture, tiny imperfections, fine body hairs, slight perspiration and natural sunlit sheen without artificial smoothing.

Behind her are shelves filled with bottles and glassware, rustic coastal café furniture, turquoise-painted wooden structures, and glimpses of the brilliant blue ocean. The background dissolves into a soft layered teal-and-blue blur with shallow depth of field.

Relaxed luxury beach-resort atmosphere, candid editorial summer photography, natural proportions, realistic fabric tension and ribbed swimsuit texture, authentic sunlight, subtle photographic imperfections, high detail, natural color response, shallow depth of field, approximately 85mm lens, f/2.0, unretouched photography, no beauty filter, no plastic skin, no CGI appearance.

⑪夜のラウンジ×ビキニ美女

Two fictional 20-year-old adult Japanese women, clearly adult appearance, photorealistic natural photo, tasteful clean magazine gravure style, authentic candid night resort lounge snapshot, clean seiso-kei gyaru party mood. They are fictional adults and not real people.

The left woman has a top Japanese idol-like tanuki face with a clean gyaru touch, an extremely cute round soft face, soft cheeks, round gentle eyes, one eye playfully winking, a small natural nose, soft pink lips, and a relaxed mischievous smile. She has long dark brown hair with straight airy bangs and soft loose waves falling over her shoulders. She is seated slightly angled toward the camera, leaning naturally with one hand resting beside her and the other hand holding a pineapple drink with a small cocktail umbrella. She wears a pale icy-blue sheer ruffled mini cover-up layered over a matching light blue bikini-style outfit, with translucent frills, soft mesh layers, realistic seams, and natural fabric wrinkles.

The right woman has a cute adult Japanese idol-like tanuki face with a slightly glamorous seiso-kei gyaru mood, round gentle eyes, soft cheeks, a small natural nose, glossy pale pink lips, and a calm sweet expression while looking directly at the camera. She has light brown hair styled in a loose side updo with airy bangs, soft curled strands around her cheeks, small white flower hair accessories, and sunglasses resting on her head. She is seated close beside the left woman, body angled slightly inward, one hand holding a pineapple drink, shoulders relaxed, posture elegant and friendly. She wears a white and pale lavender frilled bikini-style resort outfit with soft ruffle trim, a small skirt-like bottom detail, a pearl necklace, delicate accessories, realistic fabric texture, soft folds, and ordinary real-world fit.

For both women, extremely flat chest with extremely minimal bust volume, virtually no forward projection, a shallow and nearly straight upper-torso profile, creating an almost masculine-like flat chest silhouette. The chest contour is visually almost flat even through the outfit, with no pronounced bust mound, no emphasized cleavage, and fabric draping naturally over a nearly straight upper torso. Slim healthy natural body proportions, relaxed shoulders, natural collarbones, realistic skin texture, visible pores, slight imperfections, natural facial asymmetry, not overly symmetrical, not plastic skin.

They are sitting in a high-rise night lounge or resort bar with a large window behind them, sparkling city lights and dark skyscrapers visible outside, colorful soft purple-blue LED lighting, slight flash reflection, white seating, pineapple cocktails, and a spontaneous vacation-night atmosphere.

Authentic candid snapshot photographed spontaneously by a friend, handheld camera capture, slightly imperfect framing, subtle natural camera shake, very slight motion blur from body movement, naturally uneven exposure, occasional slightly blown highlights from direct flash and lounge lighting, realistic sensor noise and fine grain, imperfect autofocus while keeping both faces mostly sharp, natural unretouched skin texture with visible pores and tiny imperfections, irregular hair strands sticking naturally to the face and neck, subtle lens flare and optical imperfections, realistic dynamic range, ordinary real-world night lounge lighting, spontaneous off-timing expression and movement, smartphone or compact mirrorless camera character, natural depth of field, straight-out-of-camera appearance, no beauty retouching, no artificial skin smoothing, no studio lighting, no cinematic color grading, no perfect symmetry, no CGI, no 3D-rendered appearance.

Vertical smartphone portrait composition, medium two-person framing from head to upper thighs, slightly close camera distance, casual flash-photo look, high-resolution photorealistic smartphone or compact mirrorless photo quality.

ぶっちゃけプロンプト云々、GPTimage2.5は少しだけ扱いが難しくなった気がしてならないのは僕だけでしょうか？

今後もGPTimage2.5を徹底的に使ってみるのでまた記事にしてみます。

みなさんも素晴らしい画像が作れたら共有してくだされば幸いです。

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