ハロウィン準備、進めてますか？

ハロウィンまであと１カ月ほどに迫りました！

noteの街を散歩していると、ちらほら準備しているかたを見かけますね！

例年、ハロウィンとは全く縁がない生活を送っている私も、今年はハロウィンにちなんだ何かをやりたいと思っていました。

そこで、まだ期間的に余裕のある今。

プロンプトなど作って公開するのがいいんじゃないか？となりました。

メンバーシップで先行公開していました！

そこで、メンバーシップで先行公開させて頂いていたプロンプトを公開しようと思います！

初月無料、その後月100円の応援価格で設定させて頂いているメンバーシップでは、参加下さっているかたの記事紹介、有料記事の公開、今何を進めているのかお知らせ、もしあればIT関連などご質問にも可能な限りお答えしております！

この記事でやっていることは？

今回は

1. ハロウィン向け画像を作る

2. 作った画像を短い動画にする

の2本立てで、AIに作ってもらうためのプロンプトを公開しています！

ハロウィン向け画像を作る

まずは完成品をご覧ください！

今回はChatGPTを使って画像を作成しました。

以下のプロンプトを、キャラクターの画像と一緒にChatGPTに渡しています。

英語なのは、AIがしたがってくれやすいからです。

「キャラクターなんて持ってないよ」

というかたにも、後ほど即席でキャラクターを作ったサンプルがありますのでご安心ください！

A cheerful and vibrant Halloween scene featuring the EXACT CHARACTER from the attached reference image.

## ABSOLUTE CHARACTER REFERENCE — HIGHEST PRIORITY

The attached image is the definitive visual reference for the main character.

Reproduce the main character as the SAME CHARACTER shown in the reference image, not as a newly designed character inspired by it.

Preserve the character's original appearance and proportions EXACTLY.

The character has a simple, compact, rounded body with no conventional human-like torso.
Its body is essentially one small, soft, rounded shape, with very short, tiny arms and very short, tiny legs.

IMPORTANT:
The character's unusual proportions and simple silhouette are intentional design features and MUST NOT be normalized into human or generic chibi proportions.

STRICTLY PRESERVE:

- the original overall silhouette
- the original body width and height ratio
- the original head/body relationship
- the compact rounded body shape
- the very short arms
- the very short legs
- the small hands
- the small feet
- the position and scale of the arms and legs
- the simple face placement
- the size and spacing of the eyes
- the small mouth
- the blush marks
- the black outline
- the white body
- the character's distinctive minimal design

DO NOT:

- redesign the character
- reinterpret the character
- turn the character into a human
- give the character a conventional torso
- lengthen the arms
- lengthen the legs
- enlarge the hands or feet
- make the body taller
- make the body thinner
- make the character more humanoid
- make the character more athletic
- give the character realistic anatomy
- transform the character into a generic anime chibi character
- change the character's original silhouette

The character should remain visually consistent with the reference image even when viewed from a different angle or placed in a new environment.

Think of the task as:
"Take this exact existing character and place it into a Halloween scene."

NOT:
"Design a cute Halloween chibi character based on this reference."

## HALLOWEEN TRANSFORMATION

Change ONLY the character's clothing/accessories and pose as necessary for the Halloween scene.

Do not change the underlying body shape.

Place a small, cute pointed witch hat on the character, sized appropriately for its original body proportions.

Add small Halloween accessories such as tiny jack-o'-lantern decorations.

The costume and accessories must fit around the original compact body rather than changing or replacing its shape.

The character is happily participating in Halloween magic.

Its tiny arms are raised in a natural version of its ORIGINAL arm proportions.
Do not enlarge or lengthen the arms to create the pose.

A small swirling, sparkling pastel-colored magical orb floats just in front of the character.

A few colorful candies and lollipops gently float around it.

The magical effect should create the impression that the character is casting magic without requiring human-like anatomy.

## SURROUNDING CHARACTERS

Surround the main character with several adorable Halloween characters:

- a tiny vampire boy wearing a cape
- a friendly zombie child
- a cute Frankenstein's monster
- a playful mummy

The supporting characters are secondary.

They must not obscure the main character.

The main character should remain immediately recognizable as the character from the reference image.

## SETTING

Outside a charming, warmly lit spooky Western mansion at night.

A crescent moon is visible in the sky.

The mansion has glowing windows and friendly Halloween decorations.

The ground is covered with a colorful abundance of candies, cookies, chocolate bars, and Halloween treats.

Friendly jack-o'-lanterns are scattered throughout the scene.

Cute cartoon bats fly around the glowing windows.

## ATMOSPHERE

Joyful, playful, wholesome Halloween festival atmosphere.

Cute rather than frightening.

Warm, magical, festive, colorful, and welcoming.

## VISUAL STYLE

Cute Japanese illustration aesthetic with pastel and vibrant colors, soft lighting, clean expressive linework, detailed Halloween decorations, and a kawaii atmosphere.

Do NOT use the visual style to alter the proportions or anatomy of the reference character.

The reference character's original design takes priority over the general art style.

The final image should look like the ORIGINAL CHARACTER has been placed into a Halloween world.

It must NOT look like a newly created Halloween character based on the reference.

High-quality polished illustration, rich details, vibrant pastel colors, soft atmospheric lighting.

ChatGPTの画面はこんな感じです。

ちなみに、ChatGPTは無課金です！

チャット欄にプロンプトを貼り、画像もコピペやら「＋」ボタンでアップロードするやらで、同時に渡します。

作った画像を短い動画にする

こちらも、完成品からご覧ください！

動画はクレジット消費が大きいので、念のため課金しているGeminiを使って作りました。

無課金でも1動画作る程度なら、恐らく問題ないはずです。

こちらには、先ほど作成した画像を、以下のプロンプトとともに渡しています。

Create a short, cheerful Halloween animation from the provided image.

## ABSOLUTE IMAGE REFERENCE

Use the provided image as the definitive source for the entire animation.

The video must preserve the exact visual appearance, character designs, proportions, composition, colors, costumes, and overall style of the source image.

Do NOT redesign or reinterpret any character.

The central white rounded character is especially important.

Preserve the central character's exact:
- body shape
- body proportions
- silhouette
- size
- width-to-height ratio
- tiny arms
- tiny legs
- face
- eye position
- mouth
- blush marks
- outline
- witch hat
- costume
- overall character identity

The central character must NOT morph, stretch, squash, grow, shrink, become humanoid, become more realistic, or change into a generic chibi character.

Do not alter the original character design during the animation.

The video should look like the original still image has gently come to life.

## CHARACTER MOTION

Keep the central character in approximately the same position throughout the video.

Give the character only subtle, cute movements:

- a very gentle body bounce
- a tiny natural movement of its original short arms
- a slight happy reaction to the magic
- subtle blinking if appropriate

The movements must remain within the character's original proportions.

Do NOT create large arm movements.
Do NOT make the arms longer.
Do NOT make the legs longer.
Do NOT make the body stretch.
Do NOT make the character jump dramatically.
Do NOT make the character walk or run.

The character should remain recognizable in every frame.

## MAGIC EFFECT

Animate the magical energy surrounding the central character.

The pastel magical light should slowly swirl around the character.

Small sparkles should twinkle and appear and disappear naturally.

The magical glow should gently pulse.

The floating candies and lollipops should slowly drift and rotate through the air.

Keep all magical effects consistent with the original image.

## SURROUNDING CHARACTERS

Animate the surrounding Halloween characters very subtly.

The vampire, zombie, Frankenstein, and mummy may gently sway, bounce, wave, blink, or make tiny cheerful movements.

Keep their original designs, proportions, costumes, and positions unchanged.

Do not allow them to transform or overlap the central character.

## ENVIRONMENT

Bring the Halloween environment gently to life.

- Jack-o'-lanterns flicker softly.
- Warm lights in the mansion windows gently glow and pulse.
- Small lanterns flicker naturally.
- Cartoon bats slowly fly across the background.
- Small particles and sparkles drift through the air.
- Candy and sweets in the foreground remain mostly stationary, with only subtle movement from the magical atmosphere.

The crescent moon remains fixed in the sky.

The mansion remains structurally unchanged.

## CAMERA

Use a very slow and smooth cinematic camera movement.

A subtle slow push-in toward the central character is preferred.

Do not dramatically zoom.
Do not rotate the camera.
Do not change the composition.
Do not move the camera rapidly.

Keep the central character clearly visible throughout the entire video.

## MOTION STYLE

The animation should feel soft, cute, magical, festive, and wholesome.

Use smooth, gentle, natural motion.

Avoid exaggerated cartoon motion.

Avoid rapid movement.

Avoid visual distortion.

Avoid flickering.

Avoid sudden changes.

Avoid morphing.

Avoid adding new characters or objects.

Avoid changing the art style.

## MOST IMPORTANT REQUIREMENT

This is an IMAGE-TO-VIDEO transformation, not a new image-generation task.

Do not recreate the scene from scratch.

Do not redesign the characters.

Do not reinterpret the central character.

Preserve the source image as faithfully as possible and add only subtle animation and camera movement.

The central character must remain the EXACT SAME CHARACTER from the input image from the first frame to the last frame.

The final result should feel like:

"the original Halloween illustration has gently come alive."

Not:

"a new animated version of the character."

Geminiでも同様に、コピペやら「＋」ボタンで画像を添付することができます。

キャラクターなんて持ってない！

せっかくなので、マイキャラ画像を作ってみませんか？

凝りだしたら色々あると思うのですが、簡単なものならすぐにでもAIが作ってくれます。

こちらも、1つや2つ作るだけなら無課金で問題なし！

例えば今回、以下のようにGeminiに伝えました。

ファンタジー　冒険者　緑基調　キャラクターシート

最後の「キャラクターシート」が効いて、すぐに何かの画像が出来上がってくると思います。

私は通常、「ゆるキャラ」というキーワードを入れてキャラクターを作っています。

今回は、これまで作ったことのない、ファンタジーの冒険者風なキャラクターをAI丸投げで作ってみることにしました。

出来上がってきた画像はこちら。

この、出来立てほやほやキャラクターシートを渡して、画像生成プロンプトを実行しました。

今回はGeminiで実行です。これはアリなのでは！？

いかがでしょうか？

さいごに

特に動画の作成は、敷居が高いと感じるかたも多いのではないでしょうか。

私自身、「動画なんてまともなもの作れないよ」と思いながら過ごしてきました。

特に、1回あたりのクレジット消費が大きすぎて、試行錯誤する気にもなりませんでした。

ですが、最近はAI自体がとても賢くなっており、簡単な指示でも、それなりのものが作れてしまいます。

いろんな人のプロンプトなどを使って遊ぶのも楽しい！

改造してみるのも楽しい！

オリジナルのものを作ってみるのも楽しい！

是非気楽に、AI創作を楽しんでみてください！

ハロウィンコラボさせて頂いた記事 (随時更新)

📖 エッセイ
連載中！

ガンプラ、紡ぐ、家族

どうやら私は、ひとりだけ別の世界に住んでいるようだ (全4話)

📖 短編小説

PR記事を書かせて頂いています！

メンバーシップ始めました！
まだ手探りですが、ご要望/無茶振り/質問、可能な限りお受けします！

何でもどうぞ！答えられるものは全て答えます！
設置はお済みですか？図らずも人の庭でnote質問箱を試す！｜へろん

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