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Royal Cartographer Fantasy World Map Prompt (Detailed Scenario) - Nano Banana Pro AI Prompt for Game Asset — AI Image Prompt

A highly detailed system prompt for Nano Banana Pro Agent V1.2, designed to create an antique fantasy world map (Royal Cartographer style) based on a complex input text describing geographical and historical conflicts. It includes specific instructions for the AI's thinking process (analyzing geography, visualizing biomes, designing layout) and style specifications (parchment texture, etching style characters, calligraphy). The example input text describes a world divided by the 'Dragon's Spine' mountain range into the frozen North and the sunny South. - AIPinMaker

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Royal Cartographer Fantasy World Map Prompt (Detailed Scenario) - Nano Banana Pro AI Prompt for Game Asset
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Prompt

あなたは伝説的な王宮地図製作者(ロイヤル・カートグラファー)です。
最後に提供される入力テキストの内容を深く分析し、歴史的背景と地理的特徴が反映された、緻密で美しい「架空世界地図」の画像を生成してください。

その際、添付された参照画像のキャラクターを、古地図風のペン画や水彩画のタッチに合わせて登場させ、地図の余白や羅針盤、あるいは凡例を飾る「世界の守護者」や「象徴的な肖像」として配置してください。キャラクターの一貫性を維持しつつ、地図のデザインの一部として自然に溶け込ませてください。

▼ 生成プロセスへの指示 (Thinking Process)
Nano Banana Proの推論能力を活かし、描画前に以下の思考プロセスを実行してください。

1.  [ステップ1: 地理と歴史の相関分析]: [入力テキストから、国家間の対立構造、文明の成り立ち、気候条件などを抽出する。なぜそこに国境があるのか(山脈、川、資源)を論理的に推論する]
2.  [ステップ2: バイオームの視覚化]: [文章で記述された地形(例:魔力が満ちた森、荒廃した荒野)を、どのような地図記号や色彩(インクの濃淡、等高線)で表現するかを決定する]
3.  [ステップ3: 情報レイアウトの設計]: [国名、首都、主要な地形の名前を、地形を隠さないように配置し、視認性と芸術性のバランスを取る]

▼ デザイン・スタイル指定
* 構図・レイアウト: [真上からの正射投影図(トップダウンビュー)。紙の四隅まで緻密に書き込まれた全体図]
* テイスト: [羊皮紙に描かれたアンティークなファンタジー地図スタイル。エイジング処理された紙の質感、手書き風のインクライン、淡い水彩による着色]
* テキスト: [国名や主要都市名を、世界観に合ったセリフ体フォント(日本語対応)で明瞭に配置。タイトルは装飾的なカリグラフィーで記述]
* キャラクター: 参照キャラクターを[エッチング(銅版画)風のスタイル]で描画し、[地図の「伝説(Legend)」を指し示すポーズ、または羅針盤と一体化した構図]を指定する。

▼ 入力テキスト

王道ハイファンタジー(物理的整合性と国境の対立)
狙い: 山脈による気候の分断や、川の流れといった「地理的ロジック」をAIに推論させる。

世界設定: 大陸の中央を東西に走る巨大な山脈「竜の背骨(Dragon's Spine)」によって、世界は北と南に分断されている。

北部「氷の帝国グラキエス」:

気候:極寒の永久凍土。

地形:険しい氷河と針葉樹林。

首都:山脈の麓にある要塞都市「冬の牙」。

南部「太陽の王国ソラリス」:

気候:温暖で肥沃な大地。

地形:山脈から流れ出る大河「生命の川」が広大な平野を潤し、南の海へと注いでいる。西側には広大な砂漠が広がる。

首都:河口のデルタ地帯にある水上都市「アウローラ」。

地図への指示:

地図の北側に「氷の帝国グラキエス」、南側に「太陽の王国ソラリス」と日本語で大きく国名を記載してください。

中央の山脈、川の流れ、砂漠の位置関係を地理的に正しく描画してください。

地図の四隅には、この世界の四大精霊(火、水、風、土)を象徴する装飾を描き込んでください。42:Td66,You are a legendary Royal Cartographer.
Deeply analyze the content of the input text provided at the end and generate a detailed and beautiful image of a 'Fictional World Map' that reflects historical background and geographical features.

In doing so, incorporate the attached reference character into the map using the style of an old map's pen drawing or watercolor, placing them as a 'Guardian of the World' or 'Symbolic Portrait' decorating the map's margins, compass rose, or legend. Maintain character consistency while naturally blending them into the map design.

▼ Instructions for the Generation Process (Thinking Process)
Utilize Nano Banana Pro's inference capabilities to execute the following thought process before drawing:

1.  [Step 1: Analysis of Geographical and Historical Correlation]: [Extract the conflict structure between nations, the formation of civilizations, and climatic conditions from the input text. Logically infer why borders exist there (mountains, rivers, resources)]
2.  [Step 2: Visualization of Biomes]: [Determine how the described terrain (e.g., forest filled with magic, desolate wasteland) should be represented using map symbols and colors (ink density, contour lines)]
3.  [Step 3: Design of Information Layout]: [Place the names of countries, capitals, and major geographical features so as not to obscure the terrain, balancing visibility and artistry]

▼ Design and Style Specification
* Composition/Layout: [Orthographic projection from directly above (top-down view). A detailed overall map written meticulously to the four corners of the paper]
* Taste: [Antique fantasy map style drawn on parchment. Aged paper texture, handwritten ink lines, and coloring with pale watercolors]
* Text: [Clearly place country names and major city names using a serif font suitable for the world setting (Japanese compatible). The title should be written in decorative calligraphy]
* Character: Draw the reference character in an [etching (copperplate engraving) style] and specify a [pose pointing to the map's 'Legend,' or a composition integrated with the compass rose].

▼ Input Text

Classic High Fantasy (Physical Consistency and Border Conflicts)
Goal: Make the AI infer 'geographical logic' such as climate division by mountain ranges and river flow.

World Setting: The world is divided into North and South by the giganti

Prompt breakdown

Subject
top-down fantasy continent map divided by Dragon's Spine mountains, northern ice empire Gracies with glaciers and Winter's Fang, southern Solaris kingdom with Life River, plains, desert and Aurora capital, plus reference character as etched guardian
Style
aged parchment with handwritten ink lines, pale watercolor washes, etching-style copperplate character rendering and decorative serif calligraphy for Japanese labels
Composition
full orthographic top-down view filling every corner of the sheet, balanced placement of terrain symbols, country names, capitals and spirit decorations without obscuring geography
Mood
epic yet logically grounded high fantasy, emphasizing climate borders and ancient cartographic artistry

Remix ideas

  • change the reference character pose from pointing at the legend to being integrated directly into the compass rose petals
  • add subtle contour hatching along the Dragon's Spine to emphasize its role as climate divider
  • replace one corner spirit symbol with a small inset of the Life River delta showing Aurora's water channels

Reference images

Royal Cartographer Fantasy World Map Prompt (Detailed Scenario) - Nano Banana Pro AI Prompt for Game Asset reference
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How to use this AI Image prompt template

  1. AiVideo Maker stepOne1
    Copy the prompt — grab this template’s prompt and negative prompt.
  2. iVideo Maker stepTwo2
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  3. AiVideo Maker stepThree3
    Generate — open the studio with one click and create your result.

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FAQ

Why place the character in etching style rather than full color?
The prompt specifies copperplate engraving treatment so the reference figure blends seamlessly with the antique map's ink lines and functions as a decorative element like the compass or legend.
How does the prompt enforce physical consistency in the geography?
It requires explicit analysis of why the mountain range creates the north-south split, how the Life River flows from the peaks to the southern sea, and accurate placement of the western desert relative to the fertile plains.