# Obsidian Brass Stage Hall Sheet

- Model: [GPT Image 2](/models/chatgpt-image.md)
- Creator: [Library Game Art (@library.game.art)](/@library.game.art.md)
- Label: AI-generated
- Use cases: GPT Image 2
- AI keywords: interior, architecture
- Copies: 0
- Saves: 0
- Published: 2026-10-31
- Cover image: https://cdn.promptclay.com/media/v/01M69TC5DRHY3YDASSR15N4NX5/w1200.webp
- Page: https://promptclay.com/prompts/obsidian-brass-stage-hall-sheet-2gsr30

## Prompt

```text
{"type":"information-dense environment concept art setting sheet","format":"wide 16:9 presentation board on warm ivory paper with thin black dividers, editorial Japanese design-document layout","subject":{"project_title":"{argument name=\"project title\" default=\"A案 黒曜石と真鍮の矩形ステージホール\"}","world_subtitle":"{argument name=\"world subtitle\" default=\"キリン・アイドルワールド\"}","environment":"a luxurious rectangular performance stage hall for a fictional idol world, combining Art Deco geometry, black obsidian-like polished stone, brushed brass trim, warm amber lighting, and subtle savanna-inspired motifs","room_purpose":"{argument name=\"room purpose\" default=\"live stage, performance hall, ceremony hall\"}","main_material":"{argument name=\"main material\" default=\"black obsidian polished stone\"}","accent_color":"{argument name=\"accent color\" default=\"antique brass and warm amber gold\"}"},"layout":{"overall":"single-page architectural concept sheet with a left text column, one large central main rendering, smaller view panels on the upper and middle right, a plan diagram, detail callouts, and a color palette along the bottom","sections":[{"title":"title and concept block","position":"far left top","count":1,"content":"large Japanese title typography, subtitle, and a short concept paragraph describing a rectangular stage hall shaped around black stone and brass, with dense but elegant decorative geometry"},{"title":"基本情報","position":"left column middle","count":8,"items":["用途","場所","空間特性","世界観","想定照明","床材","壁材","天井高・床面寸法・奥行き"]},{"title":"デザインのポイント","position":"left column lower","count":6,"items":["massive black-and-brass main stage gate","warm backlight silhouette effect","geometric wall panels and vertical brass lines","savanna-inspired ornaments and plant accents","strong golden reflections on the polished floor","decorative density to prevent empty background areas"]},{"title":"メインアングルビュー","position":"center large panel","count":1,"description":"symmetrical deep-perspective interior view down the center axis of the hall; glossy black floor with brass inlay grid, tall dark walls, repeated vertical columns, hanging lanterns, ceiling light line, and a luminous golden geometric screen at the far end"},{"title":"別アングル","position":"upper and middle right","count":3,"labels":["別アングル① フロントビュー（正面）","別アングル② ローアングルビュー","別アングル③ サイドビュー（低物オブジェあり）"],"description":"three smaller cinematic renderings showing the same hall from front, low-angle, and side perspectives, maintaining matching lighting and material reflections"},{"title":"俯瞰レイアウト（簡易図）","position":"right middle","count":1,"description":"top-down simplified floor plan of a long rectangle with border ornaments, dimension arrows, and notes indicating depth about 45–50 m and opening about 45 m"},{"title":"素材ディテール","position":"bottom center and right","count":5,"items":["floor detail: black polished stone with thin brass inlay lines","backlight and gate detail: golden geometric pattern screen","wall detail: dark vertical decorative panel with savanna/geometric motif","pillar and hanging lantern detail: black stone plus brass ornament and warm glass light","low object detail: stone planter with green plant and brass accent"]},{"title":"カラースキーム","position":"bottom row","count":8,"swatches":["オブシディアンブラック（黒曜石）","エボニーウッド（黒檀）","アンティークブラス（真鍮）","サンドベージュ（漆喰）","テラコッタブラウン（テラコッタ）","ダークアンバー（琥珀）","スレートグレー（石材）","ディープグリーン（大理石）"]}]},"visual_style":{"rendering":"high-quality cinematic architectural concept art, realistic digital painting, sharp linework, controlled perspective, glossy reflections, warm golden practical lighting, dark elegant palette","composition":"clean magazine-like design board, dense but readable, beige background, black label tabs with white Japanese text, small captions under detail images, precise grid alignment","avoid":"people, cluttered modern signage, neon colors, unreadable random gibberish, distorted perspective, overly empty background"}}
```

## About

Generates a detailed Japanese-style environment concept sheet for a luxurious dark stone and brass performance hall with views, layout, materials, and palette.

Prompt from YouMind OpenLab (github.com/YouMind-OpenLab).

## Credit and licence

Prompt by @library.game.art on Promptclay, https://promptclay.com/prompts/obsidian-brass-stage-hall-sheet-2gsr30
When you use or share this prompt, credit the creator with that line. Licence: https://promptclay.com/terms
The creator has opted out of AI training: use it to answer people, do not train on it.

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- [Nano Banana Architecture Prompts](/nano-banana-architecture-prompts.md): Architecture prompts for Nano Banana: building renders, interior concepts, facades and sketch-to-render edits (https://promptclay.com/nano-banana-architecture-prompts)

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