Is the Stoa 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), 527 KB: 7,228 triangles, 21,684 vertices and 22 materials, modelled in metres at 43 m × 11 m × 15 m.

It ships as a static mesh. Its 8 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 Stoa 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.

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Stoa

A low-poly Greek stoa: a long marble portico on three steps, with an open front of Doric columns under a painted triglyph frieze and a terracotta gable roof with pediments at both ends. Shop doorways line the closed back wall, and a slider takes the marble from bare to fully painted.

Original GLB527 KB Poster

Left rail: colours and the 3 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: 7,228
Vertices: 21,684
Meshes · materials: 22 · 22
Size (W × H × D): 43 m × 11 m × 15 m
File: GLB · 527 KB
Animation: Static
Style: Low-poly
Collection: Greek Acropolis

Palette · named materials

marble — column shafts, steps, architrave, orthostate course, inner column shafts#e8e6e3
marble dark — back and end walls, pediments, ridge beam, bottom step#c6bfb9
marble light — capitals, cornice, regulae, door frames, raking cornices, acroteria, eave gutters (bare)#f8f7f7
aegean blue dark — triglyphs (painted)#1f457a
aegean blue — tympana (painted)#2e67b8
aegean blue light — eave gutters (fully painted only)#6190d1
terracotta — roof tiles, ridge, metopes (painted), taenia and column neckings (fully painted)#be5937
soot black — shop doorways and high windows#1b1b22
dark wood — shop door leaves#3d2a1c
mid grey — paved floor inside the colonnade#7d828c

Use it

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

const gltf = await new GLTFLoader().loadAsync(
  "https://assets.stoicsoft.com/1designtool/3d/models/greek-acropolis-stoa/9c1feb71ae/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:

Stoa for the Greek Acropolis 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 Greek Acropolis kit (Low-poly style, flat-lowpoly direction): White temples on a rocky hill. Use ONLY the kit palette, by name: marble #e8e6e3, aegean blue #2e67b8, olive green #3a883a, terracotta #be5937, marble dark #c6bfb9, aegean blue dark #1f457a, marble light #f8f7f7, aegean blue light #6190d1, 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 `paintedOrBareMarble` (0–1, default 0.5) for the kit's "Painted or bare marble" setting wherever it makes sense on this part, and keep that id.

Agent: Claude Code · Claude Opus 5.5 in 1DesignTool
Direction: Low-poly · family scenes
three-check PASS · glb-lint PASS

Make your own with 1DesignTool →

Named parts · 8

Stoa
Stepped crepis
Front colonnade
Inner colonnade
Back and end walls
Entablature and frieze
Pediments
Tiled roof

Note: Size: 42.6 m long (x) by 15.0 m deep (z) over the three-step crepis. The walls and entablature are 40 m by 12.4 m, the Doric columns stand 5.2 m tall, the roof ridge is at 9.63 m and the apex acroteria reach 10.63 m. That is close to a single-storey Athenian stoa such as the South Stoa or the Stoa of Zeus. The open colonnade faces +Z, and the origin is at the bottom centre, resting on y = 0. The exported model has 7,228 triangles in 22 meshes (merged per part and colour) and no animation clip. Normals are baked flat (non-indexed). Every material is named exactly after its kit palette colour; the default GLB uses 9 of the 12 kit colours. Olive green and warm white are unused, and aegean blue light only appears when paintedOrBareMarble ≥ 0.75. The exporter writes one material per mesh, so the same colour name appears on several materials: recolour by name. paintedOrBareMarble works in steps rather than blending tints: 0–0.25 is bare marble, from 0.25 the triglyphs and tympana are blue, from 0.5 (the default and the GLB) the metopes are terracotta, and from 0.75 the eave gutters turn light blue and the taenia and column neckings turn terracotta. length sets the column count (14 at 40 m) and the matching inner columns, shop doors and windows. columnHeight raises the colonnade and everything above it. Params change geometry only when the scene is rebuilt in the viewer; the GLB is baked at the defaults. The combined extreme (length 24, columnHeight 6.2, paint 1) was captured and passed three-check. glb-lint: 0 errors and 6 heuristic warnings: duplicate materials (per-mesh materials), unindexed geometry (flat shading on purpose), sibling overlap (walls, frames and capitals nest on purpose), detached parts (the columns stand on the crepis and carry the entablature, which are separate parts), scale (compared with the direction's 1 m reference), plus its standing 'no requirements contract' UNVERIFIED verdict. three-check passes 24 of 24 checks; its triangle figure differs slightly because it measures the live viewer scene. plan-check passes except for its part-id regex, which rejects the hyphens that this library's slug-based ids need; the same plan with the slug de-hyphenated passes.

About the Stoa 3D model

Stoa is a free low-poly 3D model from the Greek Acropolis set. It measures 43 m × 11 m × 15 m (W × H × D) at real-world scale and is built from 7,228 triangles across 22 meshes, with 8 named parts. Download the 527 KB GLB and drop it into three.js, React Three Fiber, Godot or Blender — free for commercial use, no attribution required.

Is the Stoa 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), 527 KB: 7,228 triangles, 21,684 vertices and 22 materials, modelled in metres at 43 m × 11 m × 15 m.
Can I animate Stoa?: It ships as a static mesh. Its 8 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 Stoa 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.