
どうも、株式会社ソフトクリエイト で情報屋やってます。山口です。
普段は企業様向けに Microsoft 365 活用のご支援をおこなっています。
毎月、公開型セミナーやワークショップのようなことをしているので、プレゼンテーション資料を作成・更新しない週はありません。とはいっても、そればかりやっている訳でもないので、手早く資料を作成して、リハして、さぁ、本番だー!みたいな感じです(^^;
そんな中で、最近は目的や用途ごとに画像の生成を効率化する工夫をしており、今回はその方法の共有です。画像生成のテクニックとしては特別なものではないので、今回は参考になる STYLE を 25 パターンまとめてご案内してみます。
例は Microsoft 365 Copilot で生成したものです(^^
※ Chat GPT ですか?と聞かれることが多いので
Copilot での画像生成 パターン25例 ~パラメーター×構成×STYLE で、狙ったテイストの画像を安定して作る~
■ 前提条件
| 項目 | 内容 |
|---|---|
| 利用環境 | Microsoft 365 Copilot(Copilot Chat)で画像生成が利用できること |
| 生成の限界 | モデルの学習の限界があるため、どんな画像でも思いどおりに生成できるわけではありません |
| 提供状況 | 画像生成機能の提供状況や仕様は、テナントや更新状況によって異なる場合があります(要確認) |
■ 安定した画像を作るための基本の型
Copilot での画像生成は、「生成パラメーター」×「構成(生成する画像の対象)」×「画像の STYLE」の3 つを分けてプロンプトを投げることで、品質が安定します。何を描くか(構成)と、どう描くか(STYLE)を切り分けておくと、構成はそのままに STYLE だけ差し替える、といった使い回しがしやすくなるのがポイントです。
画像生成系のモデルには何かしらのパラメーターが用意されていることが多いので、使っているモデルについて一度調べておくと、指定できることの幅が広がります。
| 要素 | 役割 | 今回の指定例 |
|---|---|---|
| 生成パラメーター | 画像の向きや背景の扱いなど、出力の形式を決める | orientation: landscape/transparent_background: false |
| 構成 | 画像に何を描くか(場所・人物・季節・時間帯など)を決める | 渋谷のビル群を背景に、多くの人が歩いているシーン |
| STYLE | 画像をどんなテイストで描くかを決める | 日本アニメ風、水彩スケッチ、浮世絵 など |
生成パラメーターの選択肢
| パラメーター | 値 | 使いどころ |
|---|---|---|
| orientation | landscape | 横長。PowerPoint のスライド用 |
| orientation | portrait | 縦長。人物やポスター向け |
| orientation | square | 正方形。アイコン的なビジュアルや SNS 向け |
| orientation | unspecified | 生成側に任せる |
| transparent_background | true / false | 背景を透明にするかどうか |
■ 手順
STEP 1:プロンプトのひな形を用意する
まずは、3 つの要素を枠で分けたひな形を用意します。【構成】と【STYLE】の中身は自由に差し替えて使います。
以下の内容で画像を生成してください。
【生成パラメーター】
orientation: landscape
transparent_background: false
【構成】
<ここは自由に指定>
例)渋谷のビル群を背景に、多くの人が歩いているシーン。
若い男性と女性を複数人、服装や髪型はバランスよく。
秋の夕方をイメージする。
【STYLE】
<ここも自由に指定(後述の25パターンから選んで貼り付け)>
STEP 2:Copilot Chat に投入して生成する
ひな形の【構成】と【STYLE】を埋めたら、Copilot Chat に貼り付けて送信します。

図1:パラメーター・構成・STYLE を分けたプロンプトを投入する
STEP 3:STYLE を差し替えてテイストを変える
構成はそのままに、STYLE だけを入れ替えて生成し直します。次の章の 25 パターンは、すべて同じ構成(下記)で STYLE だけを変えたものです。見比べると、STYLE の違いだけでここまで雰囲気が変わるのが分かると思います(^^
【構成】
渋谷のビル群を背景に、多くの人が歩いているシーン。
若い男性と女性を複数人、服装や髪型はバランスよく。
秋の夕方をイメージする。
💡 STYLE は英語で書くほうが安定します
画像生成では、STYLE を英語のキーワードで並べるほうが仕上がりが安定します。
以降の 25 パターンも、STYLE 部分はすべて英語で記述しています。
◆ STYLE パターン 25 例
各パターンは「生成例」と「【STYLE】に貼り付ける文」をセットで掲載しています。生成パラメーターと構成は、STEP 1・STEP 3 で示した内容と共通です。
1. 近未来SF映画ポスター

図2:近未来SF映画ポスター の生成例
【STYLE】に貼り付ける文
cinematic futuristic science-fantasy illustration,
premium Japanese sci-fi movie poster aesthetic,
soft bloom and glow effects,
layered double-exposure composition,
large foreground character silhouette integrated with cityscape imagery,
secondary full-body character placed in the foreground,
detailed futuristic urban skyline,
blue,
cyan,
white and pale pink dominant palette,
small accents of deep navy and warm red-orange,
crisp cinematic contrast balanced with airy highlights,
subtle lens glow and atmospheric haze,
dramatic backlighting,
luminous environmental effects,
premium movie-poster composition,
dramatic sense of scale,
clean typography-friendly layout,
highly polished commercial illustration finish,
emotional cinematic visual language,
futuristic science-fantasy atmosphere,
presentation-friendly,
high resolution
2. 日本アニメ風

図3:日本アニメ風 の生成例
【STYLE】に貼り付ける文
Japanese animated feature film background art,
hand-painted anime environment illustration,
richly detailed architectural scenery,
soft painterly brushwork,
clean but organic shapes,
subtle hand-drawn imperfections,
natural daylight,
soft atmospheric perspective,
beautifully layered clouds,
gentle reflected light,
lush environmental details,
harmonious natural color palette,
slightly heightened color saturation,
delicate texture variation,
cinematic wide-angle composition,
strong depth from foreground to background,
quiet visual storytelling,
warm approachable visual language,
premium theatrical animation aesthetic,
detailed yet visually clean,
presentation-friendly,
high resolution
3. フレンチ・コミック / バンド・デシネ調

図4:フレンチ・コミック / バンド・デシネ調 の生成例
【STYLE】に貼り付ける文
European bande dessinée-inspired illustration,
sophisticated graphic novel aesthetic,
precise hand-drawn ink linework,
architectural detailing,
fine contour lines,
subtle cross-hatching,v carefully constructed perspective,
soft watercolor and gouache coloring,
muted European comic palette,
dusty blue,
warm sandstone,
terracotta,
sage green,
subtle cream highlights,
expressive environmental storytelling,
complex but readable scenery,
elegant cinematic panel composition,
handcrafted print quality,
mature illustrated travel-adventure atmosphere,
presentation-friendly,
high resolution
4. セルシェーディング・ゲームアート

図5:セルシェーディング・ゲームアート の生成例
【STYLE】に貼り付ける文
stylized cel-shaded 3D game illustration,
clean anime-inspired environment design,
simplified geometric architecture,
crisp silhouette shapes,
bold controlled color blocking,
two-tone cel shading,
minimal surface gradients,
bright clean color palette,
stylized water reflections,
strong directional sunlight,
clear readable forms,
subtle edge accents,
dynamic adventure-game composition,
layered bridges and pathways,
playful environmental proportions,
high visual clarity,
polished real-time game aesthetic,
friendly fantasy atmosphere,
presentation-friendly,
high resolution
5. 厚塗りデジタルペインティング

図6:厚塗りデジタルペインティング の生成例
【STYLE】に貼り付ける文
expressive digital matte painting,
rich painterly concept art,
visible textured brush strokes,
layered opaque paint treatment,
strong value structure,
dramatic light and shadow,
subtle atmospheric perspective,
complex environmental forms simplified through brushwork,
deep muted colors,
selective saturated highlights,
soft edge transitions in distant scenery,
sharp focal details,
cinematic composition,
grand environmental scale,
traditional oil-painting sensibility translated digitally,
professional entertainment concept art,
dramatic but refined atmosphere,
high resolution
6. 透明水彩・建築スケッチ

図7:透明水彩・建築スケッチ の生成例
【STYLE】に貼り付ける文
architectural watercolor sketch illustration,
delicate ink-and-wash technique,
fine hand-drawn architectural lines,
slightly imperfect perspective lines,
transparent watercolor layers,
soft pigment bleeding,
subtle granulation,
light pencil construction marks,
warm off-white paper,
muted blue,
sandstone,
soft green,
terracotta accents,
large untouched paper areas,
airy composition,
loosely suggested distant structures,
detailed focal architecture,
urban travel-sketch aesthetic,
elegant handmade craftsmanship,
presentation-friendly,
high resolution
7. ペーパークラフト・ジオラマ

図8:ペーパークラフト・ジオラマ の生成例
【STYLE】に貼り付ける文
handcrafted paper-cut diorama illustration,
layered papercraft environment,
architectural forms made from textured cardstock,
soft rounded cut-paper edges,
visible stacked paper layers,
subtle handmade imperfections,
matte paper surfaces,
gentle cast shadows between layers,
warm soft studio lighting,
restrained pastel color palette,
miniature theatrical scenery,
deep dimensional layering,
foreground and background separated by paper planes,
charming handcrafted visual language,
clean simplified details,
premium editorial craft aesthetic,
playful miniature-world atmosphere,
presentation-friendly,
high resolution
8. 建築模型・アイソメトリック

図9:建築模型・アイソメトリック の生成例
【STYLE】に貼り付ける文
stylized isometric architectural illustration,
clean miniature city visualization,
precise geometric construction,
three-quarter overhead perspective,
layered bridges and waterways,
simplified architectural forms,
crisp clean edges,
soft ambient occlusion,
subtle matte materials,
restrained modern color palette,
clean water surfaces,
small environmental details,
high spatial readability,
diagram-like visual clarity,
balanced distribution of structures,
premium architectural visualization aesthetic,
minimal clutter,
presentation-friendly composition,
high resolution
9. 手描き教育グラフィック

図10:手描き教育グラフィック の生成例
【STYLE】に貼り付ける文
playful hand-drawn educational graphic design,
modern casual presentation aesthetic,
minimalist doodle illustration style,
bold oversized handwritten typography,
loose organic abstract shapes,
simple freeform geometric elements,
thick irregular hand-drawn strokes,
soft rounded contours,
intentionally imperfect linework,
playful brush-stroke accents,
casual wavy lines and spiral doodles,
scattered decorative elements around the composition,
flat vector-like shapes,
clean solid color fills,
clean white or soft ivory background,
soft coral accents,
fresh mint green accents,
light sky blue accents,
gentle pastel yellow highlights,
balanced cheerful color palette,
high contrast black handwritten lettering,
thin rounded secondary typography,
asymmetrical balanced composition,
large central focal area,
generous negative space,
simple layered abstract forms,
subtle handmade imperfections,
no seasonal motifs,
no realistic textures,
no gradients,
no complex shading,
friendly classroom activity aesthetic,
playful quiz and worksheet design language,
contemporary Japanese stationery-inspired graphic style,
youthful approachable visual language,
clean yet whimsical appearance,
polished casual handmade aesthetic
10. 北欧オーガニック

図11:北欧オーガニック の生成例
【STYLE】に貼り付ける文
minimalist Scandinavian-inspired graphic illustration,
modern organic abstract design,
soft natural editorial aesthetic,
simple botanical illustration,
large flowing organic shapes,
smooth wavy silhouettes,
rounded asymmetrical forms,
flat vector-like shapes,
clean solid color fills,
mostly lineless illustration,
minimal outlines,
delicate thin curved accent lines,
simplified botanical branches and leaves,
abstract pebble-like forms,
small irregular dot clusters,
subtle hand-drawn imperfections,
clean soft ivory background,
muted contemporary pastel palette,
soft sage green,
dusty sky blue,
pale lavender,
light warm gray,
gentle blush pink accents,
soft neutral beige details,
low saturation colors,
soft tonal harmony,
no gradients,
no realistic textures,
no complex shading,
minimal visual detail,
generous negative space,
open central composition,
decorative elements arranged around the edges,
asymmetrical but balanced layout,
calm modern stationery aesthetic,
contemporary lifestyle editorial design,
soft Japanese natural-design influence,
timeless non-seasonal aesthetic,
fresh and sophisticated visual language,
clean and approachable appearance,
polished minimalist handmade aesthetic
11. ピクセルアート

図12:ピクセルアート の生成例
【STYLE】に貼り付ける文
deliberately crafted pixel art,
clearly visible square pixels,
consistent pixel scale throughout the image,
crisp grid-aligned contours,
carefully shaped pixel clusters,
limited cohesive color palette,
stepped shading with a small number of tonal values,
selective ordered dithering for tonal transitions,
readable silhouettes,
economical details expressed through pixel placement,
clean separation between adjacent forms,
authentic low-resolution raster aesthetic,
hard pixel edges without antialiasing,
no smooth gradients,
no blurred edges,
no painterly brushwork,
no mixed-resolution elements
12. ローポリゴン3D

図13:ローポリゴン3D の生成例
【STYLE】に貼り付ける文
stylized low-poly 3D rendering,
forms constructed from a restrained number of polygonal faces,
clearly visible planar facets,
angular simplified silhouettes,
flat-shaded polygon surfaces,
controlled color variation between adjacent faces,
geometry-driven detail rather than painted surface texture,
clean intersections and readable volumes,
matte materials,
restrained surface roughness,
coherent lighting across faceted forms,
shadows that reinforce the underlying geometry,
minimal texture mapping,
polished geometric illustration finish,
no smooth subdivision surfaces,
no dense photorealistic textures,
no hand-drawn outlines
13. クレイ・ミニチュア

図14:クレイ・ミニチュア の生成例
【STYLE】に貼り付ける文
stylized handcrafted clay miniature world,
soft claymation-inspired environment,
rounded architectural forms,
slightly imperfect handmade surfaces,
subtle fingerprints and sculpted texture,
matte clay materials,
miniature bridges and buildings,
soft diffused studio lighting,
gentle ambient shadows,
warm neutral color palette,
selective colorful accents,
tilt-shift miniature depth,
charming tactile details,
toy-like but sophisticated proportions,
whimsical environmental storytelling,
premium stop-motion animation aesthetic,
friendly handcrafted atmosphere,
presentation-friendly,
high resolution
14. ステンドグラス

図15:ステンドグラス の生成例
【STYLE】に貼り付ける文
traditional stained-glass artwork,
recognizable forms assembled from individually shaped glass pieces,
dark lead came lines separating adjacent glass sections,
flowing segmented contours,
rich translucent jewel-toned glass,
controlled variation in glass thickness and color density,
subtle rippled and seeded glass textures,
luminous transmitted light,
gentle internal color variation within each glass piece,
strong readable silhouettes,
balanced distribution of light and dark glass,
decorative craftsmanship with restrained detail,
coherent illumination across the glass surface,
predominantly planar construction,
no painted brush strokes,
no photorealistic skin or fabric surfaces,
no glossy plastic appearance
15. 刺繍とステッチアート

図16:刺繍とステッチアート の生成例
【STYLE】に貼り付ける文
handcrafted embroidery artwork on woven fabric,
forms built from clearly visible individual stitches,
directional threadwork following the contours of each shape,
satin stitches for compact filled areas,
long-and-short stitches for gradual tonal transitions,
fine backstitch outlines where needed,
subtle thread twist and natural fiber texture,
slightly raised embroidered surfaces,
small shadows between overlapping threads,
restrained thread sheen,
visible fabric weave in unstitched areas,
coordinated limited thread palette,
minor handmade irregularities,
clear silhouettes and selective detail,
authentic textile craftsmanship,
no printed imitation of stitches,
no smooth digital paint fills,
no molded plastic surfaces
16. タイルモザイク

図17:タイルモザイク の生成例
【STYLE】に貼り付ける文
hand-laid tile mosaic artwork,
forms assembled from many individually visible tesserae,
small ceramic and stone tile pieces,
clearly defined grout joints,
directional tile arrangements following the contours of forms,
subtle variation in tile size and shape,
carefully grouped tile colors creating tonal areas,
slightly irregular handmade edges,
restrained variation in surface level,
matte and softly glazed tile finishes,
fine material imperfections,
readable silhouettes at a distance,
rich material detail at close range,
coherent overall color harmony,
predominantly planar mural-like construction,
no continuous painted gradients,
no stained-glass transparency,
no seamless digital surfaces
17. ドキュメンタリー写真

図18:ドキュメンタリー写真 の生成例
【STYLE】に貼り付ける文
naturalistic documentary photography,
candid observational visual language,
unforced gestures and believable expressions,
realistic anatomy and physical proportions,
authentic everyday material textures,
available-light photographic rendering,
consistent exposure and plausible white balance,
natural tonal transitions,
restrained contrast and saturation,
subtle sensor grain,
realistic lens rendering,
contextual detail preserved where relevant,
believable depth of field,
minor incidental imperfections,
unretouched photographic character,
no staged advertising polish,
no heavy beauty retouching,
no cinematic color grading,
no illustration or painterly effects,
no artificial HDR halos
18. スクラッチボード

図19:スクラッチボード の生成例
【STYLE】に貼り付ける文
traditional scratchboard illustration,
white marks scratched through a solid black ink surface,
forms emerging from a predominantly black field,
fine tapered incised lines,
directional scratch marks following the structure of each form,
closely spaced parallel strokes and selective cross-hatching,
bright highlights built from concentrated white scratches,
deep shadows preserved as untouched black areas,
strong controlled contrast,
precise focal details with quieter surrounding areas,
subtle handmade irregularities in the scratched marks,
crisp readable silhouettes,
restrained use of broad scraped highlights,
authentic subtractive drawing character,
no soft graphite shading,
no gray paint washes,
no carved relief-print ink texture,
no smooth digital gradients
19. エアブラシ

図20:エアブラシ の生成例
【STYLE】に貼り付ける文
hand-rendered airbrush illustration,
finely atomized pigment,
smooth continuous tonal transitions,
soft feathered edges balanced with selective masked contours,
rounded volumes shaped through gradual shading,
restrained luminous highlights,
subtle overspray at selected boundaries,
clean separation of major forms,
controlled saturated colors,
carefully graduated light and shadow,
minimal visible surface texture,
polished analog commercial-art character,
selectively sharp focal details,
no visible brush strokes,
no heavy ink outlines,
no faceted polygon shading,
no exaggerated bloom,
no mirror-like digital gloss
20. 砂絵

図21:砂絵 の生成例
【STYLE】に貼り付ける文
handcrafted colored-sand artwork,
forms built from densely arranged grains of colored sand,
clearly visible granular surface texture,
subtle variation in grain size and pigment,
matte opaque color areas,
gently irregular boundaries formed by individual grains,
small scattered grains near selected edges,
slight accumulation and shallow relief in denser areas,
simplified recognizable shapes,
limited coordinated color palette,
tonal variation created through mixtures of neighboring grains,
fine contact shadows between textured areas,
carefully controlled handmade imperfections,
tactile sand-on-board character,
no smooth painted fills,
no fluid watercolor bleeding,
no glossy surfaces,
no sculpted three-dimensional sand structures
21. フェルトのアップリケ

図22:フェルトのアップリケ の生成例
【STYLE】に貼り付ける文
handcrafted felt applique artwork,
recognizable forms assembled from cut felt pieces,
soft fuzzy wool fibers visible on the surface,
matte solid-colored fabric,
slightly rounded hand-cut edges,
shallow overlapping layers with believable felt thickness,
small blanket stitches or running stitches securing selected edges,
subtle thread tension and minor stitch irregularities,
gentle contact shadows between fabric layers,
simplified expressive silhouettes,
restrained coordinated color palette,
warm tactile craft character,
mostly frontal textile composition,
no densely embroidered filled areas,
no smooth paper surfaces,
no knitted or crocheted construction,
no glossy molded materials,
no deep miniature-diorama staging
22. 切り絵・影絵

図23:切り絵・影絵 の生成例
【STYLE】に貼り付ける文
elegant layered paper silhouette illustration,
Japanese kirie-inspired visual language,
intricate cut-paper architecture,
strong foreground silhouettes,
delicate negative-space details,
layered depth through overlapping shapes,
limited monochromatic palette,
deep navy,
charcoal,
warm ivory,
subtle muted accent color,
soft backlit glow,
paper fiber texture,
precise handcrafted edges,
decorative ornamental patterns,
dramatic depth without realistic modeling,
poetic theatrical composition,
minimal but intricate visual design,
presentation-friendly,
high resolution
23. レトロ日本観光ポスター

図24:レトロ日本観光ポスター の生成例
【STYLE】に貼り付ける文
vintage Japanese tourism poster illustration,
Showa-era commercial art influence,
clean hand-painted graphic forms,
simplified architectural scenery,
bold but tasteful color blocking,
slightly faded printed colors,
warm cream paper base,
deep blue,
brick red,
muted green,
golden beige accents,
subtle lithographic print texture,
minimal shading,
strong compositional hierarchy,
idealized scenic perspective,
elegant nostalgic lettering-friendly space,
classic railway-poster atmosphere,
refined retro Japanese graphic design,
presentation-friendly,
high resolution
24. 浮世絵

図25:浮世絵 の生成例
【STYLE】に貼り付ける文
traditional Japanese woodblock print-inspired fantasy illustration,
ukiyo-e influenced composition,
bold flowing contour lines,
flat layered color areas,
stylized architectural perspective,
decorative cloud formations,
rhythmic repeating shapes,
limited traditional color palette,
indigo blue,
muted vermilion,
warm beige,
deep charcoal,
subtle ochre accents,
visible handmade print texture,
slight color registration imperfections,
traditional washi paper texture,
dramatic asymmetrical composition,
flattened yet layered spatial depth,
elegant decorative detail,
historical printmaking aesthetic,
fantasy reinterpretation,
highly stylized rather than photorealistic,
presentation-friendly,
high resolution
25. 水墨画・幻想都市

図26:水墨画・幻想都市 の生成例
【STYLE】に貼り付ける文
Japanese sumi-e inspired fantasy landscape,
expressive black ink wash painting,
minimalist brushwork,
soft bleeding ink edges,
dramatic variations in ink density,
mist-covered architecture,
partially obscured distant structures,
large areas of negative space,
monochromatic charcoal and warm gray palette,
subtle muted color accents,
rice-paper texture,
fluid expressive brush strokes,
atmospheric perspective,
poetic asymmetrical composition,
quiet monumental sense of scale,
traditional East Asian painting influence,
minimal digital polish,
elegant and contemplative visual language,
presentation-friendly,
high resolution
◆ 注意点とよくあるつまずき
| こんなとき | ポイント・対処 |
|---|---|
| イメージどおりにならない | モデルの学習の限界があるため、何でも描けるわけではありません。構成を具体的にし、STYLE を近いパターンに切り替えて試します |
| テイストが安定しない | STYLE は英語のキーワードで記述します。構成と STYLE を枠で分けて書くと、ブレが小さくなります |
| 背景が邪魔になる | transparent_background: true を指定すると、背景を透明にした画像を依頼できます |
| 季節感など余計な要素が入る | 「no seasonal motifs」のように、入れたくない要素を no ~ で明示すると抑えられます |
| 人物が出てくる画像を使う | 実在の人物に見える画像や、社外公開での利用は、自社のルールや利用規約を確認してから使いましょう |
■ まとめ
Copilot での画像生成は、「生成パラメーター」「構成」「STYLE」の3つを分けて指定するだけで、狙ったテイストの画像をかなり安定して作れるようになります。とくに構成と STYLE を切り分けておくと、同じ題材のまま雰囲気だけを変えられるので、資料全体のトーンを揃えたいときにも重宝します。
STYLE は Copilot Chat を利用して作成・修正しながら、自分なりのパターンを5つぐらい準備しておくと良いですよ。今回の25例を出発点に、ぜひお気に入りの「鉄板 STYLE」を見つけてみてください(^^








