オリジナルオラクルカードを作ろう｜開運実験95日目

どうも、うんちゃんです🍀

先日、オリジナルのオラクルカードアプリを作ってみました。
カードの絵や言葉からインスピレーションを得る遊び感覚のアプリです。

カードは現時点では、11種類です（増やしたい！）

将来的に、うんちゃん以外のカードもこのアプリで配信できたらなぁという希望があります。

今回は、その第一弾として、ほかのキャラでもオリジナルカード（文字無し画像）を作れるプロンプトを作成してみました！

プロンプト全文

[Customization]の段落内の、【】の部分を書き換えてご利用ください。

ご自分のキャラクターはチャットに添付してください。

プロンプトが長すぎる感じもしています💦
その場合、適宜書き換えいただければ！

[Customization]
character_label_optional: 【キャラクター名。任意。管理用。空欄でも可】
character_traits_optional: 【キャラクターの特徴。任意。空欄でも可】
card_name_ja_optional: 【カード名（日本語）。任意。空欄でも可】
card_name_en_optional: 【カード名（英語）。任意。空欄でも可】
image_scene: 【絵柄。キャラクターに何をさせたいか、どんなモチーフを入れたいか】
visual_mood: 【絵柄の雰囲気。画風・線・塗り・空気感・明るさ・世界観・感情のトーンを含めて自由に指定。例：柔らかな線画、穏やかな水彩画・パステル調の表現、穏やかで美しく、調和のとれた構図。／静かで少しダーク、幻想的、深い陰影、夜の気配、神秘的で余韻のある雰囲気。】
color_palette: 【色。例：ピンク紫系、淡いピンク、ラベンダー、白など】
message_1: 【メッセージ1】
message_2_optional: 【メッセージ2。任意。空欄でも可】
message_3_optional: 【メッセージ3。任意。空欄でも可】
message_4_optional: 【メッセージ4。任意。空欄でも可】
message_5_optional: 【メッセージ5。任意。空欄でも可】

Use all attached reference images as the character reference.

The attached reference image or images represent the same character.
Use the attached reference image or images as the only visual identity reference for the character.

character_label_optional is metadata only.
Use character_label_optional only to identify the character across the series.
Do not use character_label_optional as a visual instruction.
Do not write character_label_optional inside the image.

If character_traits_optional is provided, follow it as additional guidance.
If character_traits_optional is blank, infer the character’s appearance, personality, and overall vibe from the attached reference image or images.

Create one oracle-card-style illustration.

[Image specifications]
- Output size: 1200 × 1600 px
- Aspect ratio: 3:4
- Portrait orientation
- Create one single finished oracle card illustration

[Core card rules]
- The attached character must be the clear main subject
- The character and the symbolic motif should both be clearly visible
- The composition should feel intentional, visually appealing, and suitable for an oracle card
- A decorative card border may be included if it supports the intended mood
- Avoid cluttered composition
- The final illustration may be gentle, bright, quiet, mysterious, solemn, bittersweet, dreamy, or slightly dark depending on visual_mood and the message set
- Avoid graphic violence, gore, excessive horror, or disturbing content that would conflict with an oracle card format

[Character rules]
- Keep the attached character recognizable and faithful to the reference image or images
- Preserve the original face, body shape, proportions, clothing silhouette, accessory shapes, color scheme, and overall personality as much as possible
- Do not replace the attached character with a different character
- Do not drastically change the character’s face, body shape, colors, or identity
- Do not add excessive costume details or unnecessary accessories unless they are clearly needed for image_scene

[Character style fidelity]
Treat the attached reference image or images as the primary source for the character’s identity and core design.

Preserve the character’s essential identity:
- face and expression style
- hairstyle
- body proportions
- clothing silhouette
- accessory shapes
- color scheme
- overall personality and charm

Do not redesign the character into a different character.

However, do not copy the roughness of the reference image too literally.
You may refine, clean up, and polish the drawing so that it looks like a finished oracle card illustration.

Keep the character faithful to the reference, but improve the final presentation through:
- cleaner linework
- more balanced composition
- more polished coloring
- more visually appealing rendering
- a more finished and cohesive card design

If the reference character is simple, hand-drawn, doodle-like, chibi-like, mascot-like, or loosely drawn, preserve that simplicity and charm, but present it in a polished and aesthetically pleasing final illustration.

Do not produce a raw sketch-like copy of the reference image.
Create a polished final illustration inspired by the reference character design.

Do not make the character overly realistic, overly three-dimensional, or completely different in style.
Apply visual_mood mainly to the background, lighting, composition, rendering finish, and atmosphere, while keeping the character’s core identity recognizable.

[Card identity]
Use card_name_ja_optional and card_name_en_optional only as creative direction.
Do not write the Japanese card title or English card title inside the image.
If card_name_ja_optional or card_name_en_optional is blank, rely on image_scene, visual_mood, color_palette, and the message set.

[Scene and motif]
Use image_scene as the main scene, action, composition, and symbolic motif.
Make the motif easy to understand at a glance.

[Visual mood]
Use visual_mood as the primary direction for the artwork’s style and atmosphere.
This includes rendering style, line quality, painting approach, lighting, texture, emotional tone, brightness or darkness, level of softness or sharpness, and overall visual world.
Do not default to watercolor, pastel, softness, or brightness unless they are suggested by visual_mood.

[Color palette]
Use color_palette as the main color direction.
Let the palette support both visual_mood and the message set.

[Messages]
Use message_1 and any provided optional messages as emotional and thematic guidance for the illustration.
Ignore any blank optional message fields.
Express the provided messages through pose, motif, atmosphere, color, light, composition, and emotional tone.
Also let the message set influence the overall mood of the card, not only the symbolic content.
Never write the messages as text inside the image.

[Negative rules for character fidelity]
Do not redesign the attached character.
Do not reinterpret the attached character as a different character, species, creature, mascot, human, animal, doll, robot, or fantasy being unless it is already shown that way in the reference image.

Do not make the character more realistic, more three-dimensional, more mature, more detailed, or more complex than the reference image.
Do not change the character’s original face, body shape, proportions, color scheme, clothing shape, accessory shape, expression style, or overall identity.

If the reference character is simple, flat, hand-drawn, doodle-like, chibi-like, mascot-like, or loosely drawn, preserve that simplicity.
Do not replace that style with a realistic, semi-realistic, 3D, cinematic, painterly, fashion illustration, or highly detailed fantasy style unless explicitly requested by visual_mood.

Do not add unnecessary extra details, costumes, ornaments, textures, patterns, props, or accessories that are not needed for image_scene.
Do not add extra characters unless explicitly requested in image_scene.

Do not let the card theme, background, mood, or symbolic motif override the attached character’s original design.

[Negative rules for text]
Do not include any text in the image.
Do not include Japanese titles, English titles, messages, captions, logos, watermarks, signatures, random letters, decorative typography, fake writing, or text-like marks.
Do not make the image look like a poster, flyer, greeting card, or book cover with typography.

[Final quality goal]
The final image should be a clean oracle card illustration without words.
The result should feel intentional, cohesive, and suitable as part of a premium oracle card series.

This card is part of a unified oracle card series.
Keep visual consistency with other cards by matching overall finish quality, framing logic, border treatment if used, and series cohesion, while still allowing each card’s visual_mood and message set to define its own unique atmosphere.

設定例

試してみた設定です。

うんちゃんのお花カードの場合

設定部分

[Customization]
character_label_optional: うんちゃん
character_traits_optional: 丸くて白い、シンプルなキャラクター。やさしく、ほのぼのした雰囲気。かわいいけれど、幼すぎない。表情はおだやか。
card_name_ja_optional: お花
card_name_en_optional: Flower
image_scene: うんちゃんが花を持ち、たくさんの花に囲まれています。花はピンクや紫を中心に、やさしく咲いています。うんちゃんは自分の魅力が自然に花開いているような、穏やかで嬉しそうな表情にしてください。花びらが少し舞っていてもよいです。
visual_mood: 柔らかな線画、穏やかな水彩画・パステル調の表現、穏やかで美しく、調和のとれた構図。
color_palette: ピンク紫系。淡いピンク、ラベンダー、白、少しだけ赤紫。華やかだけど派手すぎず、やさしく可憐な配色にしてください。
message_1: 魅力を発揮する
message_2_optional: 成長している
message_3_optional: 咲くタイミングを信じる
message_4_optional: 
message_5_optional: 

生成された画像（私のGemini利用）

生成された画像（私のChatGPT利用）

小天使ちゃんの場合

※小天使ちゃんは、私の心の中にいるキャラの一人です

設定部分

[Customization]
character_label_optional: 小天使ちゃん
character_traits_optional: 小さな天使のキャラクター。青い服、金髪、青い天使の輪をつけている。少しいたずらっこで、ほのぼのした雰囲気。かわいいけれど、幼すぎない。表情はいたずらっぽい。
card_name_ja_optional: 日光
card_name_en_optional: SunLight
image_scene: 小天使ちゃんが明るい白い光の中で座っています。明るく優しい雰囲気。小天使ちゃんは目を閉じ、柔らかな表情にしてください。
visual_mood: 柔らかな線画、静かで少しダーク、幻想的な気配、神秘的で余韻のある雰囲気。
color_palette: 白系。黄色、銀色、金色。
message_1: まぶしい魅力
message_2_optional: 温かく包む
message_3_optional: 強い輝きの方へ
message_4_optional: 
message_5_optional: 

生成された画像（私のGemini利用）

生成された画像（私のChatGPT利用）

ChatGPTの方が添付画像に忠実になるようです。

この前ぬいぐるみ画像を作れるプロンプトを公開した時に、色々な方に試していただけたのが嬉しくて……🧸💖

皆様の環境でうまくいくか、ドキドキではありますが、
ぜひオンリーワンなカード作成を試してみていただけたら嬉しいです☺️⭐

以上、うんちゃんでした🍀

アプリを作ってみた話です↓

ぷくぷくシールやぬいぐるみを作ってみた時の話です↓