Is the Mailboxes 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), 42 KB: 588 triangles, 1,098 vertices and 12 materials, modelled in metres at 51 cm × 1.4 m × 60 cm.

Can I animate Mailboxes?

It ships as a static mesh. Its 6 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 Mailboxes 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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Mailboxes

A low-poly pair of kerbside mailboxes for a quiet suburban street. Two tunnel-top letter boxes with dark front doors and raised green flags sit on a dark-wood post and crossbar, set in a concrete footing with grass tufts.

Original GLB42 KB 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: 588
Vertices: 1,098
Meshes · materials: 12 · 12
Size (W × H × D): 51 cm × 1.4 m × 60 cm
File: GLB · 42 KB
Animation: Static
Style: Low-poly
Collection: Suburban Street

Palette · named materials

pastel siding — box shells (default houseColours)#c4c4c4
pastel siding dark — base rails, back rings and top ribs#9e9e9e
asphalt — front doors#3b3e45
white trim — door latches#f4f1ec
soot black — door hinges and flag pivots#1b1b22
lawn green — flags and grass tufts#3a883a
lawn green dark — grass tufts#235223
lawn green light — grass tufts#5db15d
mid grey — concrete footing#7d828c
dark wood — post, crossbar and braces#3d2a1c

Use it

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

const gltf = await new GLTFLoader().loadAsync(
  "https://assets.stoicsoft.com/1designtool/3d/models/suburban-street-mailboxes/008f7da97c/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:

Mailboxes for the Suburban Street 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 Suburban Street kit (Low-poly style, flat-lowpoly direction): Quiet family homes on a curved road. Use ONLY the kit palette, by name: pastel siding #c4c4c4, lawn green #3a883a, asphalt #3b3e45, white trim #f4f1ec, pastel siding dark #9e9e9e, lawn green dark #235223, pastel siding light #ebebeb, lawn green light #5db15d, 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 `houseColours` (0–1, default 0.5) for the kit's "House colours" 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 products
three-check PASS · glb-lint PASS

Make your own with 1DesignTool →

Named parts · 6

Mailboxes
Footing and grass
Post and crossbar
Letter boxes
Doors
Flags

Note: Size: each letter box is a standard rural size of 0.165 m wide × 0.22 m tall × 0.48 m deep. The box bottoms sit 1.07 m above the ground, which is the usual kerbside reach height. The 0.09 m square post stands in a 0.26 m concrete footing. Overall the model is about 0.51 m wide × 0.58 m deep × 1.36 m tall with the flags raised. The origin is at the bottom centre of the post and the model rests on y = 0 with the doors facing +Z. It has 878 triangles in 14 meshes (merged per part and colour), with flat normals and no animation clip. Every material is named exactly after a kit palette colour, and 10 of the 12 colours are used at the defaults. The exporter writes one material per mesh, so a colour name can appear on several materials; recolour by name. Flags use lawn green because the kit palette has no red. Params are baked into the GLB at their defaults and only change the geometry when the scene is rebuilt in the viewer. boxCount sets 1–3 boxes and the crossbar widens to fit. boxHeight raises the post. flagRaised swings the flags from lying back along the box to upright. doorOpen drops the doors toward the kerb and shows a dark mouth. houseColours (kit 'House colours') picks the box swatch: pastel siding light, pastel siding (default) or pastel siding dark, with a matching rail colour. glb-lint reports 0 errors and 3 heuristic warnings: the material count is above the direction default because of per-mesh materials, there are duplicate same-name materials, and the merged grass tufts' bounding box overlaps the footing (they sit around it on purpose). plan-check passes except for its part-id regex, which rejects the hyphens in the slug-based ids this library requires. three-check accepts those ids, and all 6 survive the GLB reload.

About the Mailboxes 3D model

Mailboxes is a free low-poly 3D model from the Suburban Street set. It measures 51 cm × 1.4 m × 60 cm (W × H × D) at real-world scale and is built from 588 triangles across 12 meshes, with 6 named parts. Download the 42 KB GLB and drop it into three.js, React Three Fiber, Godot or Blender — free for commercial use, no attribution required.

Is the Mailboxes 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), 42 KB: 588 triangles, 1,098 vertices and 12 materials, modelled in metres at 51 cm × 1.4 m × 60 cm.
Can I animate Mailboxes?: It ships as a static mesh. Its 6 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 Mailboxes 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.