Info-Dense Concept Art Set - Obsidian & Brass Stage AI Image Prompt

Information-dense environment concept art setting sheet, 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: 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 and concept block (far left top, large Japanese title typography, subtitle, and concept paragraph); basic information (left column middle, 8 items: usage, location, spatial characteristics, worldview, assumed lighting, floor material, wall material, ceiling height/floor dimensions/depth); design points (left column lower, 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); main angle view (center large panel, symmetrical deep-perspective interior view down center axis, glossy black floor with brass inlay grid, tall dark walls, repeated vertical columns, hanging lanterns, ceiling light line, luminous golden geometric screen at far end); alternative angles (upper and middle right, 3: front view, low-angle view, side view with low objects); overhead layout (simplified floor plan, long rectangle with border ornaments, dimension arrows, depth approx. 45-50m, opening approx. 45m); material details (bottom center and right, 5 items: floor detail, backlight and gate detail, wall detail, pillar and hanging lantern detail, low object detail); color scheme (bottom row, 8 swatches: obsidian black, ebony wood, antique brass, sand beige, terracotta brown, dark amber, slate gray, deep green). Visual style: 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.