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Cột cờ Lũng Cú, Hà Giang

Tabletop diorama of the Lũng Cú flag tower on Dragon Mountain: a tapering octagonal grey-stone tower with eight Đông Sơn bronze-drum relief panels, slit windows and a parapeted observation deck, flying the exact national flag over stone steps, terraced slopes and green-and-grey karst peaks on a slate plinth.

Original GLB15.2 MB Poster

Left rail: colours and the 5 knobs the agent wrote into this model — they rebuild the geometry and go into your download. Right rail: looks for the viewer. Drag to orbit, scroll to zoom.

Triangles: 200,112
Vertices: 440,309
Meshes · materials: 63 · 13
Size (W × H × D): 92 cm × 58 cm × 92 cm
File: GLB · 15.2 MB
Animation: scene-motion · 5.0s
Style: Product
Collection: Landmarks

Palette · named materials

grey limestone#9AA19C
slate#434A51
aged bronze#6E7B63
flag red#DA251D
flag star yellow#FFFF00
brushed steel#B9BFC6
hill grass#61894B
leaf green#43653A
packed earth#7A6A50
paddy water#93B9AD
rice paddy green#79A85A
karst rock#566160
paving stone#B2A995

Use it

import { GLTFLoader } from "three/addons/loaders/GLTFLoader.js";

const gltf = await new GLTFLoader().loadAsync(
  "https://assets.stoicsoft.com/1designtool/3d/models/cot-co-lung-cu/6a6bb8c533/model.glb"
);
scene.add(gltf.scene); // metres, +Y up, front faces +Z

const mixer = new THREE.AnimationMixer(gltf.scene);
gltf.animations.forEach((clip) => mixer.clipAction(clip).play());
// in your loop: mixer.update(delta)

How it was made

The brief given to 1DesignTool's “3D object” template:

The Lũng Cú Flag Tower at Vietnam's northernmost point, on the summit of Dragon Mountain (Núi Rồng). An octagonal tower about 33 m tall built of grey stone: a wide octagonal base whose eight faces carry relief panels in the style of Đông Sơn bronze drums (concentric rings of flying birds, boats, dancers and a star at the centre), a slimmer octagonal shaft with slit windows for the internal spiral stair, an observation platform with a parapet at the top, and a flagpole flying a large national flag (red with a five-pointed yellow star, no text). Around the hilltop: a stone-paved summit terrace, long flights of stone steps winding up the green hill, and below it, a ring of terraced fields and sharp karst peaks, all as a diorama on a plinth. Loop (5 s): the flag waves seamlessly. Make it a polished, elegant model in the stylised-PBR direction: clean proportions, smooth curvature, soft bevels on every edge, crisp silhouettes and a restrained palette of named materials (name each material for what it is, e.g. "limestone", "red lacquer", "glazed roof tile", "sea water"); every material in the exported GLB must carry that name — set `material.name` on each one, because an unnamed material fails review. It must be recognisable at a glance as the real place. No text, lettering, logos or signage anywhere. Reference photos of the real place are in `reference/` (ref1.jpg, ref2.jpg, ref3.jpg): open and study them before planning if you can view images, and compare your hero capture with them before delivering. Natural sites and large complexes are presented as a tabletop diorama on a clean rounded plinth with slate-grey sides; state the real-world scale and the diorama scale in meta.notes. Hard requirement: the exported GLB must contain AT LEAST 100,000 triangles (target 120,000–200,000) — measure it before delivering. Spend the budget on real modelled detail (roof tiles, carvings, railings, mouldings, rock strata, foliage clusters, water surface, boats), never on invisible subdivision. Keep the GLB under 20 MB: index all geometry, instance repeated parts, no image textures.

Agent: Claude Code · Claude Sonnet 5.5 in 1DesignTool
Generation: 2.24M tokens (94% cached) · ≈ $1.14 at API prices · 5-hour plan +2%, weekly plan +0%
Direction: Product · family scenes
three-check PASS · glb-lint PASS

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Named parts · 16

Lũng Cú diorama
Plinth
Dragon Mountain
Terraced paddies
Karst peaks
Foliage
Summit steps
Summit terrace
Flag tower
Octagonal base
Bronze drums
Shaft
Observation deck
Deck railing
Flagpole
National flag

Note: Real tower ~33 m on the Dragon Mountain summit; diorama scale ~1:100 for the tower (body ~0.21 m, about a third of the 0.583 m model height) with the landscape vertically compressed; 0.92 m across. GLB carries ~197,000 triangles and a 5 s seamless flag-wave clip on 26 hinged cloth segments. Flag is 2:3, #DA251D with one centred #FFFF00 five-pointed star (circumscribed circle 2/5 of flag length). All 13 materials are named by what they are. 13 materials exceed the stylised-pbr-product default of 8 (declared override in design-plan.md); 'slate' doubles as recessed-joint material.