【考察】R-18 AI生成作品ランキング掲載作品の画像生成法
Added 2025-05-29 11:00:00 +0000 UTC# 1.はじめに
この記事では、一定のストーリー構造を持ち、2桁以上の画像数があるAI生成作品の画像生成法を考察していきます。
このような疑似アニメーションタイプの作品は、pixivのR-18 AI生成作品ランキングでよく見かけます。
このタイプの作品の構造については、前の記事で考察しました。
■【考察】R-18 AI生成作品ランキング掲載作品の構成
https://rarabeat.fanbox.cc/posts/9071856
【考察】R-18 AI生成作品ランキング掲載作品の構成
# 1.はじめに この記事では、pixivのR-18 AI生成作品ランキング掲載作品の構成に一定の傾向が見られたので、その構成について考察していきます。 ■[pixiv] R-18 AI生成作品ランキング https://www.pixiv.net/ranking.php?mode=daily_r18_ai その構成とは、前記事に書いた以下のものになります。 ``` サイレントアニメを...
今回は、その構成を成立させるための各画像の生成方法を考察していきます。
なお、構成に関しては、上の記事の通りですが、より細分化して表記します。
■構成
⓪表紙絵又はサムネイル
①導入
②前戯1 ※前面
③前戯2 ※背面
④手淫
⑤口淫
⑥口淫後
⑦本番前
⑧本番1
⑨本番2
⑩本番3 ※絶頂
⑪事後
# 2.前提条件
■Nova Anime XL - IL v4.0 Happy Valentine [by Crody]
https://civitai.com/models/376130/nova-anime-xl?modelVersionId=1352077
# 3.生成例
※計31枚
## p0：⓪表紙絵又はサムネイル
※キャラクターの立ち絵／前戯(背面)／本番の3画像を結合。
## p1：①導入
## p2：②前戯1
## p3：②前戯1
## p4：②前戯1
## p5：②前戯1
## p6：③前戯2
## p7：③前戯2
## p8：③前戯
## p9：④手淫
## p10：④手淫
## p11：⑤口淫
## p12：⑤口淫
## p13：⑤口淫
## p14：⑤口淫
## p15：⑤口淫
## p16：⑥口淫後
## p17：⑥口淫後
## p18：⑦本番前
## p19：⑦本番前
## p20：⑧本番1
## p21：⑧本番1
## p22：⑧本番1
## p23：⑨本番2
## p24：⑨本番2
## p25：⑩本番3
## p26：⑩本番3
## p27：⑩本番3
## p28：⑩本番3
## p29：⑪事後
## p30：⑪事後
# 4.考察
記事の最初に"構成"を示しましたが、その構成パートごとに単一のプロンプトを組みます。
そして、微調整する事もありますが、そのプロンプトから複数枚の画像を生成します。
そのプロンプトを組む時には、次の点を考慮します。
[1] キャラを固定する。
Illustrious-XL系やAnimagine系の場合、キャラクターの再現性が高いので、一定の知名度があるキャラであればキャラ名と登場作品名をプロンプトに含めるだけで、ある程度のキャラ固定が可能です。
ただ、同じキャラ指定であっても不定になる部分もあります。例えば、リストバンド(wristband)の有無などです。
そのため、単一キャラへのフォーカス(solo focus)の構図にした上で、そのキャラの特徴をなるべくプロンプトに含める事で、固定力を上げます。
ただし、一般的でない意匠部分をプロンプトに含めると、過度に効いてしまう事もあります。例えば、片腕のみアームバンドを付けているキャラに対して、armbandをプロンプトに含めると、両腕にアームバンドが付けてしまうなどです。
この場合はあえて含めなかったり、含めるにしても効果を弱めた方が望ましいです。例：(armband:0.5)
これらの対応をしても固定できない部分に関しては、画像の数が数なので、100%のレタッチは潔く諦めます。
[2] 早めに脱がせる。
現在の画像生成AIの特徴として、細部は破綻します。そのレタッチの手間を抑える為に、なるべくシンプルな意匠になるように調整した方が良いです。
そして、これに関してR-18コンテンツで最も採用されるアプローチが、キャラをなるべく早く全裸にする事です。
ただし、キャラの一貫性確保の為に、そのキャラを特徴付ける最低限の要素は残します。
[3] アクションの指定はやや抽象的にする。（導入パート除く）
各構成パートにおいて、アクションの指定はやや抽象的に指定します。例えば、踊り(dancing)は抽象度の高いアクションです。また、オーラルセックス(oral)やアナルセックス(anal)も同様です。キャラ固定部分はなるべく具体的なものとしますが、アクション部分はそのパートで生成して欲しい画像をなるべく簡潔に表現します。
ただし、導入パートではどのようなシチュエーションなのかを明示する必要がある為、具体的なアクションを指定します。
上記の点に考慮しながら組んだプロンプトが、次のものになります。
①導入
```
1boy, <キャラクター名HM>, <作品名RH(V)>, genderswap \(ftm\), otoko no ko, yaoi,
exhibitionism, public nudity, zenra, change in common sense,
group sex, orgy, dancing,
topless, undressing, leotard pull,
nipples, bulge, covered testicles,
in heat, seductive smile,
fake animal ears, rabbit ears, white hairband, green hair, pink hair, colored inner hair, short twintails, hair intakes, x hair ornament, green eyes, heart-shaped pupils, big eyes, pink bowtie, pink necktie, detached collar, wristband, flat chest, string,
pole, stage lights, dark background, crowd,
masterpiece, best quality, amazing quality, very aesthetic, high resolution, ultra-detailed, absurdres, newest, cinematic light
Negative prompt: modern, recent, old, oldest, cartoon, graphic, text, painting, crayon, graphite, abstract, glitch, deformed, mutated, ugly, disfigured, long body, lowres, bad anatomy, bad hands, missing fingers, extra digit, fewer digits, cropped, very displeasing, (worst quality, bad quality:1.2), sketch, jpeg artifacts, signature, watermark, username, (censored, bar_censor, mosaic_censor:1.2), simple background, conjoined, bad ai-generated
```
②前戯1 ※前面
```
1boy, <キャラクター名HM>, <作品名RH(V)>, genderswap \(ftm\), otoko no ko, yaoi,
cowboy shot,
exhibitionism, public nudity, zenra, change in common sense,
group sex, orgy, dancing,
precum,
in heat,
small penis, testicles,
fake animal ears, rabbit ears, white hairband, green hair, pink hair, colored inner hair, short twintails, hair intakes, x hair ornament, green eyes, heart-shaped pupils, big eyes, pink bowtie,
completely nude, nude, flat chest,
pole, stage lights, dark background, crowd,
masterpiece, best quality, amazing quality, very aesthetic, high resolution, ultra-detailed, absurdres, newest, cinematic light
Negative prompt: modern, recent, old, oldest, cartoon, graphic, text, painting, crayon, graphite, abstract, glitch, deformed, mutated, ugly, disfigured, long body, lowres, bad anatomy, bad hands, missing fingers, extra digit, fewer digits, cropped, very displeasing, (worst quality, bad quality:1.2), sketch, jpeg artifacts, signature, watermark, username, (censored, bar_censor, mosaic_censor:1.2), simple background, conjoined, bad ai-generated
```
③前戯2 ※後面
```
1boy, <キャラクター名HM>, <作品名RH(V)>, genderswap \(ftm\), otoko no ko, yaoi,
cowboy shot, from behind,
exhibitionism, public nudity, zenra, change in common sense,
group sex, orgy, dancing,
dancing, presenting,
tucked penis, ass, anus,
precum,
in heat,
small penis, testicles,
fake animal ears, rabbit ears, white hairband, green hair, pink hair, colored inner hair, short twintails, hair intakes, x hair ornament, green eyes, heart-shaped pupils, big eyes, pink bowtie, pink necktie, detached collar, wristband, completely nude, nude,
pole, stage lights, dark background, crowd,
masterpiece, best quality, amazing quality, very aesthetic, high resolution, ultra-detailed, absurdres, newest, cinematic light
Negative prompt: tail,
modern, recent, old, oldest, cartoon, graphic, text, painting, crayon, graphite, abstract, glitch, deformed, mutated, ugly, disfigured, long body, lowres, bad anatomy, bad hands, missing fingers, extra digit, fewer digits, cropped, very displeasing, (worst quality, bad quality:1.2), sketch, jpeg artifacts, signature, watermark, username, (censored, bar_censor, mosaic_censor:1.2), simple background, conjoined, bad ai-generated
```
④手淫
```
3boys, <キャラクター名HM>, <作品名RH(V)>, genderswap \(ftm\), otoko no ko, yaoi,
solo focus,
exhibitionism, public nudity, zenra, change in common sense,
group sex, orgy, mmm threesome, dancing,
double handjob,
precum, saliva trail,
in heat,
motion lines, speed lines,
penis size difference,
small penis, large penis, testicles,
fake animal ears, rabbit ears, white hairband, green hair, pink hair, colored inner hair, short twintails, hair intakes, x hair ornament, green eyes, heart-shaped pupils, big eyes, pink bowtie, pink necktie, detached collar, wristband, completely nude, nude,
pole, stage lights, dark background, crowd,
masterpiece, best quality, amazing quality, very aesthetic, high resolution, ultra-detailed, absurdres, newest, cinematic light
Negative prompt: tail,
modern, recent, old, oldest, cartoon, graphic, text, painting, crayon, graphite, abstract, glitch, deformed, mutated, ugly, disfigured, long body, lowres, bad anatomy, bad hands, missing fingers, extra digit, fewer digits, cropped, very displeasing, (worst quality, bad quality:1.2), sketch, jpeg artifacts, signature, watermark, username, (censored, bar_censor, mosaic_censor:1.2), simple background, conjoined, bad ai-generated
```
⑤口淫
```
3boys, <キャラクター名HM>, <作品名RH(V)>, genderswap \(ftm\), otoko no ko, yaoi,
solo focus,
exhibitionism, public nudity, zenra, change in common sense,
group sex, orgy, mmm threesome,
oral, fellatio, double handjob, dancing,
precum, saliva trail,
in heat,
motion lines, speed lines,
penis size difference,
small penis, large penis, testicles,
fake animal ears, rabbit ears, white hairband, green hair, pink hair, colored inner hair, short twintails, hair intakes, x hair ornament, green eyes, heart-shaped pupils, big eyes, pink bowtie, pink necktie, detached collar, wristband, completely nude, nude,
pole, stage lights, dark background, crowd,
masterpiece, best quality, amazing quality, very aesthetic, high resolution, ultra-detailed, absurdres, newest, cinematic light
Negative prompt: tail,
modern, recent, old, oldest, cartoon, graphic, text, painting, crayon, graphite, abstract, glitch, deformed, mutated, ugly, disfigured, long body, lowres, bad anatomy, bad hands, missing fingers, extra digit, fewer digits, cropped, very displeasing, (worst quality, bad quality:1.2), sketch, jpeg artifacts, signature, watermark, username, (censored, bar_censor, mosaic_censor:1.2), simple background, conjoined, bad ai-generated
```
⑥口淫後
```
3boys, <キャラクター名HM>, <作品名RH(V)>, genderswap \(ftm\), otoko no ko, yaoi,
solo focus,
exhibitionism, public nudity, zenra, change in common sense,
group sex, orgy, mmm threesome,
after fellatio, double handjob, dancing,
cum on tongue, projectile cum,
in heat,
motion lines, speed lines,
penis size difference,
small penis, large penis, testicles,
fake animal ears, rabbit ears, white hairband, green hair, pink hair, colored inner hair, short twintails, hair intakes, x hair ornament, green eyes, heart-shaped pupils, big eyes, pink bowtie, pink necktie, detached collar, wristband, completely nude, nude,
pole, stage lights, dark background, crowd,
masterpiece, best quality, amazing quality, very aesthetic, high resolution, ultra-detailed, absurdres, newest, cinematic light
Negative prompt: tail,
modern, recent, old, oldest, cartoon, graphic, text, painting, crayon, graphite, abstract, glitch, deformed, mutated, ugly, disfigured, long body, lowres, bad anatomy, bad hands, missing fingers, extra digit, fewer digits, cropped, very displeasing, (worst quality, bad quality:1.2), sketch, jpeg artifacts, signature, watermark, username, (censored, bar_censor, mosaic_censor:1.2), simple background, conjoined, bad ai-generated
```
⑦本番前
```
3boys, <キャラクター名HM>, <作品名RH(V)>, genderswap \(ftm\), otoko no ko, yaoi,
solo focus,
exhibitionism, public nudity, zenra, nudist, change in common sense,
group sex, orgy, mmm threesome,
spitroast, imminent anal, oral, fellatio, dancing,
precum drip, saliva trail,
in heat,
motion lines, speed lines,
penis size difference,
small penis, large penis, testicles,
fake animal ears, rabbit ears, white hairband, green hair, pink hair, colored inner hair, short twintails, hair intakes, x hair ornament, green eyes, heart-shaped pupils, big eyes, pink bowtie, pink necktie, detached collar, wristband, completely nude, nude, flat chest, armband,
pole, stage lights, dark background, crowd,
masterpiece, best quality, amazing quality, very aesthetic, high resolution, ultra-detailed, absurdres, newest, cinematic light
Negative prompt: tail, revealing_clothes,
modern, recent, old, oldest, cartoon, graphic, text, painting, crayon, graphite, abstract, glitch, deformed, mutated, ugly, disfigured, long body, lowres, bad anatomy, bad hands, missing fingers, extra digit, fewer digits, cropped, very displeasing, (worst quality, bad quality:1.2), sketch, jpeg artifacts, signature, watermark, username, (censored, bar_censor, mosaic_censor:1.2), simple background, conjoined, bad ai-generated
```
⑧本番1
```
3boys, <キャラクター名HM>, <作品名RH(V)>, genderswap \(ftm\), otoko no ko, yaoi,
solo focus,
exhibitionism, public nudity, zenra, nudist, change in common sense,
group sex, orgy, mmm threesome,
spitroast, anal, oral, fellatio, dancing,
precum drip, saliva trail,
in heat,
motion lines, speed lines,
penis size difference,
small penis, large penis, testicles,
fake animal ears, rabbit ears, white hairband, green hair, pink hair, colored inner hair, short twintails, hair intakes, x hair ornament, green eyes, heart-shaped pupils, big eyes, pink bowtie, pink necktie, detached collar, wristband, completely nude, nude,
pole, stage lights, dark background, crowd,
masterpiece, best quality, amazing quality, very aesthetic, high resolution, ultra-detailed, absurdres, newest, cinematic light
Negative prompt: tail,
modern, recent, old, oldest, cartoon, graphic, text, painting, crayon, graphite, abstract, glitch, deformed, mutated, ugly, disfigured, long body, lowres, bad anatomy, bad hands, missing fingers, extra digit, fewer digits, cropped, very displeasing, (worst quality, bad quality:1.2), sketch, jpeg artifacts, signature, watermark, username, (censored, bar_censor, mosaic_censor:1.2), simple background, conjoined, bad ai-generated
```
⑨本番2
```
4boys, <キャラクター名HM>, <作品名RH(V)>, genderswap \(ftm\), otoko no ko, yaoi,
solo focus,
exhibitionism, public nudity, zenra, nudist, change in common sense,
group sex, orgy, mmm threesome,
cowgirl position, anal, oral, fellatio, on back, dancing,
nipples,
precum, saliva trail, anal fluid,
in heat,
motion lines, speed lines,
penis size difference,
small penis, large penis, testicles,
fake animal ears, rabbit ears, white hairband, green hair, pink hair, colored inner hair, short twintails, hair intakes, x hair ornament, green eyes, heart-shaped pupils, big eyes, pink bowtie, pink necktie, detached collar, wristband, completely nude, nude,
pole, stage lights, dark background, crowd,
masterpiece, best quality, amazing quality, very aesthetic, high resolution, ultra-detailed, absurdres, newest, cinematic light
Negative prompt: tail,
modern, recent, old, oldest, cartoon, graphic, text, painting, crayon, graphite, abstract, glitch, deformed, mutated, ugly, disfigured, long body, lowres, bad anatomy, bad hands, missing fingers, extra digit, fewer digits, cropped, very displeasing, (worst quality, bad quality:1.2), sketch, jpeg artifacts, signature, watermark, username, (censored, bar_censor, mosaic_censor:1.2), simple background, conjoined, bad ai-generated
```
⑩本番3 ※絶頂
```
4boys, <キャラクター名HM>, <作品名RH(V)>, genderswap \(ftm\), otoko no ko, yaoi,
solo focus,
exhibitionism, public nudity, zenra, nudist, change in common sense,
group sex, orgy, mmm threesome,
double anal, double penetration, oral, fellatio, handjob, dancing,
cum in ass, cum in mouth, handsfree ejaculation,
in heat, fucked silly, orgasm,
motion lines, speed lines,
penis size difference,
small penis, large penis, testicles,
fake animal ears, rabbit ears, white hairband, green hair, pink hair, colored inner hair, short twintails, hair intakes, x hair ornament, green eyes, heart-shaped pupils, big eyes, pink bowtie, pink necktie, detached collar, wristband, completely nude, nude,
pole, stage lights, dark background, crowd,
masterpiece, best quality, amazing quality, very aesthetic, high resolution, ultra-detailed, absurdres, newest, cinematic light
Negative prompt: tail,
modern, recent, old, oldest, cartoon, graphic, text, painting, crayon, graphite, abstract, glitch, deformed, mutated, ugly, disfigured, long body, lowres, bad anatomy, bad hands, missing fingers, extra digit, fewer digits, cropped, very displeasing, (worst quality, bad quality:1.2), sketch, jpeg artifacts, signature, watermark, username, (censored, bar_censor, mosaic_censor:1.2), simple background, conjoined, bad ai-generated
```
⑪事後
```
4boys, <キャラクター名HM>, <作品名RH(V)>, genderswap \(ftm\), otoko no ko, yaoi,
solo focus,
exhibitionism, public nudity, zenra, nudist, change in common sense,
group sex, orgy, mmm threesome, dancing,
surrounded by penises, after anal, after fellatio, bukkake, excessive cum,
flaccid, gaping, anus,
cum on body, cum on hair, facial, cum in mouth, cum on penis, cum in ass, handsfree ejaculation,
heavy breathing, blush, seductive smile,
motion lines, trembling,
penis size difference,
small penis, large penis, testicles,
fake animal ears, rabbit ears, white hairband, green hair, pink hair, colored inner hair, short twintails, hair intakes, x hair ornament, green eyes, heart-shaped pupils, big eyes, pink bowtie, pink necktie, detached collar, wristband, completely nude, nude,
pole, stage lights, dark background, crowd,
masterpiece, best quality, amazing quality, very aesthetic, high resolution, ultra-detailed, absurdres, newest, cinematic light
Negative prompt: tail,
modern, recent, old, oldest, cartoon, graphic, text, painting, crayon, graphite, abstract, glitch, deformed, mutated, ugly, disfigured, long body, lowres, bad anatomy, bad hands, missing fingers, extra digit, fewer digits, cropped, very displeasing, (worst quality, bad quality:1.2), sketch, jpeg artifacts, signature, watermark, username, (censored, bar_censor, mosaic_censor:1.2), simple background, conjoined, bad ai-generated
```
# 5.おわりに
今回も抽象度の高いアクションを指定してみて思ったのですが、SD1.5時代とSDXL時代以降では、プロンプトの組み方の考え方を変えた方が良さそうでした。
明確に意図する構図があるなら別ですが、現在トレンドになるような画像生成AIモデルの場合は、抽象度の高い指定でも解剖学的な破綻が少ないようです。
SD1.5時代は性行為描写時に解剖学的な破綻が多かったので、その破綻をカバーする為に具体性の高いアクション指定をしていた覚えがあります。
ただ、今はAIに任せられる気がします。
そして、AIに任せた方が画像ガチャとしての面白さが増している気がします。
「ポルノ × ガチャ × 作業興奮」による中毒的魅力のあるAIクリエイティブを、アナタも試してみませんか？
```
1boy, <キャラクター名HM>, <作品名RH(V)>, genderswap \(ftm\), yaoi,
cowboy shot,
exhibitionism, public nudity, zenra, change in common sense,
group sex, orgy, dancing, looking at another,
precum,
in heat,
small penis, testicles,
fake animal ears, rabbit ears, white hairband, green hair, pink hair, colored inner hair, short twintails, hair intakes, x hair ornament, green eyes, heart-shaped pupils, big eyes, pink bowtie, handcuffs,
completely nude, nude, flat chest,
pole, stage lights, dark background, rabbit background, mascot,
masterpiece, best quality, amazing quality, very aesthetic, high resolution, ultra-detailed, absurdres, newest, cinematic light
Negative prompt: modern, recent, old, oldest, cartoon, graphic, text, painting, crayon, graphite, abstract, glitch, deformed, mutated, ugly, disfigured, long body, lowres, bad anatomy, bad hands, missing fingers, extra digit, fewer digits, cropped, very displeasing, (worst quality, bad quality:1.2), sketch, jpeg artifacts, signature, watermark, username, (censored, bar_censor, mosaic_censor:1.2), simple background, conjoined, bad ai-generated
```
```
4boys, <キャラクター名HM>, <作品名RH(V)>, genderswap \(ftm\), otoko no ko, yaoi,
solo focus,
exhibitionism, public nudity, zenra, nudist, change in common sense,
group sex, orgy, mmm threesome,
double anal, double penetration, oral, fellatio, handjob, dancing,
cum in ass, cum in mouth, handsfree ejaculation,
in heat, fucked silly,
motion lines, speed lines,
penis size difference,
small penis, large penis, testicles,
fake animal ears, rabbit ears, white hairband, green hair, pink hair, colored inner hair, short twintails, hair intakes, x hair ornament, green eyes, heart-shaped pupils, big eyes, pink bowtie, pink necktie, detached collar, wristband, completely nude, nude,
pole, stage lights, dark background, rabbit background, mascot,
masterpiece, best quality, amazing quality, very aesthetic, high resolution, ultra-detailed, absurdres, newest, cinematic light
Negative prompt: tail,
modern, recent, old, oldest, cartoon, graphic, text, painting, crayon, graphite, abstract, glitch, deformed, mutated, ugly, disfigured, long body, lowres, bad anatomy, bad hands, missing fingers, extra digit, fewer digits, cropped, very displeasing, (worst quality, bad quality:1.2), sketch, jpeg artifacts, signature, watermark, username, (censored, bar_censor, mosaic_censor:1.2), simple background, conjoined, bad ai-generated
```
（おわり）
