Is the Grand hall 3D model free for commercial use?

Yes. It is free under the 1DesignTool 3D library license: use it in personal and commercial work — games, apps, websites, renders, ads and client projects — and modify it as you like, with no credit required. What you can't do is re-sell or re-distribute the file on its own or inside a model pack.

What file format is it, and how big is it?

A single binary glTF 2.0 file (.glb), 235 KB: 2,264 triangles, 6,657 vertices and 25 materials, modelled in metres at 23 m × 26 m × 32 m.

Can I animate Grand hall?

It ships as a static mesh. Its 15 named parts are separate nodes, so you can move or animate each one in your engine.

Which engines and tools can open it?

Anything that reads glTF 2.0. three.js, React Three Fiber, Babylon.js, Godot 4 and Blender import the GLB directly; Unity and Unreal Engine load it through their glTF importers. The snippets above show the exact code for three.js, React Three Fiber, Godot and Blender.

How was the Grand hall 3D model made?

Claude Code (Claude Opus 5.5) generated it inside 1DesignTool's 3D template from a written brief, then the design kit's checks verified the geometry and the GLB before it was published. You can make your own the same way with 1DesignTool.

FREEcommercial use · no sign-up

Grand hall

A low-poly neoclassical museum grand hall: a stepped marble podium, a front colonnade with red exhibition banners under a pediment, pilastered side walls with tall windows, and a slate dome with a brass finial rising over the gabled roof.

Original GLB235 KB Poster

Left rail: colours and the 4 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: 2,264
Vertices: 6,657
Meshes · materials: 25 · 25
Size (W × H × D): 23 m × 26 m × 32 m
File: GLB · 235 KB
Animation: Static
Style: Low-poly
Collection: Museum

Palette · named materials

base#f4f1ec
trim#f9f8f6
earth#d7cebc
roof#525e6f
accent#b28c34
glass#1b1b22
door#3d2a1c
banner#861313

Use it

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

const gltf = await new GLTFLoader().loadAsync(
  "https://assets.stoicsoft.com/1designtool/3d/models/museum-grand-hall/cc8d2bf7d2/model.glb"
);
scene.add(gltf.scene); // metres, +Y up, front faces +Z

How it was made

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

Grand hall for the Museum kit. Design it as one clear asset at believable real-world scale for that setting (state the size in metres in meta.notes), with its main parts modelled and named, readable at thumbnail size and from every orbit angle. This is one part of the Museum kit (Low-poly style, flat-lowpoly direction): Quiet halls of old things. Use ONLY the kit palette, by name: marble white #f4f1ec, deep red #861313, brass #b28c34, slate #525e6f, marble white dark #d7cebc, deep red dark #430a0a, marble white light #f9f8f6, deep red light #c32222, soot black #1b1b22, warm white #f2ede2, mid grey #7d828c, dark wood #3d2a1c. Every material's `name` must be exactly the palette colour it uses — the GLB carries these names so the kit recolours as one; an unnamed material fails delivery. Kit knob: expose a param `collectionTheme` (0–1, default 0.5) for the kit's "Collection theme" setting wherever it makes sense on this part, and keep that id.

Agent: Claude Code · Claude Opus 5.5 in 1DesignTool
Generation: 3.62M tokens (95% cached) · ≈ $2.59 at API prices · 5-hour plan +6%
Direction: Low-poly · family scenes
three-check PASS · glb-lint PASS

Make your own with 1DesignTool →

Named parts · 15

Grand hall
Podium
Front steps
Hall body
Pilasters
Windows
Doors
Colonnade
Entablature
Pediment
Roof
Dome drum
Dome
Lantern and finial
Banners

Note: Real-world scale: about 22.5 m wide x 25.7 m tall (to the finial tip) x 32.3 m deep, including the front steps; the podium top is 1.2 m and the columns are 9 m tall. Origin is at the bottom centre, front faces +Z. Static model with no animation clip. Materials are named after the Museum palette colours (marble white, marble white light, marble white dark, slate, brass, soot black, dark wood, deep red); the exporter writes one material copy per mesh, so several materials share a name. Recolour by name, not by index. Collection theme (0 to 1) sets the banner tone, stepping from deep red dark through deep red to deep red light, and lengthens the banners from about 42% to 75% of the column height. The default 0.5 exports deep red. Column count steps in twos, so the centre bay over the doors stays open. Each column is also registered as museum-grand-hall.colonnade.c1 through cN. glb-lint reported 0 errors and only heuristic warnings (scale vs a 1 m reference, per-mesh material copies, non-indexed flat-shaded geometry, and intentional embedded joins such as the drum sitting through the roof). The kit's plan-check rejects the hyphenated part-id format this library requires; that is its only remaining complaint.

About the Grand hall 3D model

Grand hall is a free low-poly 3D model from the Museum set. It measures 23 m × 26 m × 32 m (W × H × D) at real-world scale and is built from 2,264 triangles across 25 meshes, with 15 named parts. Download the 235 KB GLB and drop it into three.js, React Three Fiber, Godot or Blender — free for commercial use, no attribution required.

Is the Grand hall 3D model free for commercial use?: Yes. It is free under the 1DesignTool 3D library license: use it in personal and commercial work — games, apps, websites, renders, ads and client projects — and modify it as you like, with no credit required. What you can't do is re-sell or re-distribute the file on its own or inside a model pack.
What file format is it, and how big is it?: A single binary glTF 2.0 file (.glb), 235 KB: 2,264 triangles, 6,657 vertices and 25 materials, modelled in metres at 23 m × 26 m × 32 m.
Can I animate Grand hall?: It ships as a static mesh. Its 15 named parts are separate nodes, so you can move or animate each one in your engine.
Which engines and tools can open it?: Anything that reads glTF 2.0. three.js, React Three Fiber, Babylon.js, Godot 4 and Blender import the GLB directly; Unity and Unreal Engine load it through their glTF importers. The snippets above show the exact code for three.js, React Three Fiber, Godot and Blender.
How was the Grand hall 3D model made?: Claude Code (Claude Opus 5.5) generated it inside 1DesignTool's 3D template from a written brief, then the design kit's checks verified the geometry and the GLB before it was published. You can make your own the same way with 1DesignTool.