# GPT Image Hub prompt

## メカ少女と海上都市のキービジュアル
- URL: https://www.gptimagehub.com/ja/library/evo-mecha-girl-sea-city-key-visual
- Generator URL: https://www.gptimagehub.com/ja/generate?promptId=cmqf0pyou000l13a7cqrqb7gu
- Markdown URL: https://www.gptimagehub.com/api/agent/markdown?path=%2Fja%2Flibrary%2Fevo-mecha-girl-sea-city-key-visual
- Category: コンセプトアート
- Model: gpt-image-2
- Aspect ratio: 16:9
- Style: illustration
- Tags: メカ, キービジュアル, コンセプトアート
- Updated: 2026-10-21T08:44:20.455Z
- Created: 2026-06-15T09:35:54.846Z

GPT Image 2：メカ少女と海上都市のキービジュアルのサンプル

### Full prompt
```text
暗い水面の上に傾いた鋼鉄のプラットフォームの錆びた端に立つ、メカ少女のムーディーなキービジュアルを作成してください。彼女は色白の肌で、アッシュホワイトの髪を高いポニーテールにしており、マットなガンメタルの外骨格アーマー、シアンに光る冷却材のライン、そして肩には巨大なレールカノンを装備しています。彼女の背後には、広大な見捨てられた海上都市が巨大なシルエットとなって海からそびえ立ち、霧、切断されたケーブル、錆びた塔、そして傷ついたような夕暮れの光に包まれています。シネマティックなコンセプトアートのライティングと、medium-wide shotを使用してください。
```

### Example images

Illustrative previews generated with the built-in image tool; the tool does not disclose its model identifier.

- [メカ少女と海上都市のキービジュアル — 1](https://cdn.gptimagehub.com/prompts/seo-examples-2026-10/evo-mecha-girl-sea-city-key-visual.webp)
### Usage guide
Language: en | Updated: 2026-10-21T08:44:20.455Z | Author: GPT Image Hub

A character-led science-fiction key visual with a ruined sea-city behind a mechanized protagonist. A readable silhouette and one controlled accent color keep the dense environment from competing with the character.

#### When to use
Game key art concepts, science-fiction cover studies, and character-world mood boards. It suits a medium-wide shot that shows both equipment and setting.

#### Existing example observations
The example places the armored figure toward the left, with a large shoulder weapon and cyan accents, while rusted platforms and distant towers fill the sea-city background.

#### Suggested setup
- 16:9: Place the character in one outer third and leave an open region between the weapon silhouette and major towers. A slight low angle can emphasize scale without hiding the platform.
- Reference images: Optional for a new character. Use an established character reference if armor panels and weapon design must remain consistent across a series.

#### What to customize
- Character identity — An adult salvage engineer named Rhea: Change hair, armor, and equipment as one design; retain a small number of strong identifying features.
- Accent system — Amber maintenance lights on dark graphite armor: Use one glowing color and repeat it sparingly instead of adding neon to every surface.
- Platform and city — A broken tidal-energy platform beside flooded towers: Define a stable foreground surface and a simpler distant skyline to preserve depth.

#### Rhea above the flooded power station
A salvage-engineer variation with a compact tool instead of a large cannon and a warmer accent color.
This is a new adaptation without a generated image; the existing illustration belongs to its original generation record.
```text
Create a 16:9 cinematic science-fiction key visual of Rhea, an adult salvage engineer, standing on a broken tidal-energy platform above dark water. Place her in the left third, with short silver hair, a dark graphite exoskeleton, a compact shoulder-mounted scanning tool, and a few amber maintenance lights. Keep her full silhouette readable against a slightly lighter band of sea mist. In the distance, show flooded power-station towers, hanging cables, and rusted walkways, with fewer details toward the horizon. Use bruised violet dusk light and restrained warm reflections on wet metal. Her stance is calm and purposeful, with one clear footing on the platform. No giant weapon blocking her face, extra characters, excessive neon, or title text.
```

#### Troubleshooting
- The character disappears into the city: Reduce detail behind the figure and place a lighter mist band behind the head and shoulders.
- Weapon and armor geometry become tangled: Separate the shoulder tool from the head and simplify the visible equipment before increasing surface detail.

#### Editorial provenance and generation record
AI-assisted editorial analysis of source prompts and existing illustrations; adaptations have not been generated.
- Tool: built-in image_gen; provider model: not disclosed; image: 1672 × 941.
- Illustration: https://cdn.gptimagehub.com/prompts/seo-examples-2026-10/evo-mecha-girl-sea-city-key-visual.webp
Original illustration input:
```text
Create one finished image illustrating this image prompt.
Aspect ratio: 16:9.
Create a moody key visual of a mecha girl standing on the rusted edge of a tilted steel platform over dark water. She has pale skin, ash-white hair in a high ponytail, matte gunmetal exoskeleton armor, glowing cyan coolant lines, and a massive rail cannon on her shoulder. Behind her, a vast derelict sea-city rises from the ocean in colossal silhouettes, with fog, dead cables, rusted towers, and bruised dusk light. Use cinematic concept-art lighting and a medium-wide shot.
```
### Source
- Author: @old\_pgmrs\_will
- URL: https://x.com/old\_pgmrs\_will