Is the Railway arch 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), 150 KB: 1,900 triangles, 5,700 vertices and 20 materials, modelled in metres at 10 m × 9.2 m × 8.5 m.

Can I animate Railway arch?

It ships as a static mesh. Its 9 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 Railway arch 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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Railway arch

A low-poly bay of a Victorian brick railway viaduct: a semicircular arch with a pale voussoir ring and stone keystone, a string course, parapets and a double track on top. The arch is let as a workshop, with a bottle-green shopfront and sunburst fanlight at the front and a bricked-up back wall. It is a modular piece that chains end to end.

Original GLB150 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: 1,900
Vertices: 5,700
Meshes · materials: 20 · 20
Size (W × H × D): 10 m × 9.2 m × 8.5 m
File: GLB · 150 KB
Animation: Static
Style: Low-poly
Collection: Victorian Street

Palette · named materials

brick red: piers, spandrels, vault and parapets#c32222
brick red dark: soot drip streaks, bricked-up back wall (all brick when fogLevel > 0.75)#821717
brick red light: voussoir ring#db5757
warm white: keystones, imposts, string course, coping, door frames, glazing bars, sills#f2ede2
soot black light: pier plinths, ballast bed#3a3c40
soot black dark: shop windows, fanlight and back window glass#090a0b
bottle green: shopfront infill and window heads#3a883a
dark wood: sleepers, transom beam, doors#3d2a1c
mid grey: rails#7d828c
brass: door handles#b28c34
soot black: soot streaks on sooted brick (only when fogLevel > 0.75)#151619

Use it

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

const gltf = await new GLTFLoader().loadAsync(
  "https://assets.stoicsoft.com/1designtool/3d/models/victorian-street-railway-arch/400a9343ff/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:

Railway arch for the Victorian 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. It is a modular piece that snaps on a 1 m grid: give it a length in whole metres and put the origin at its snapping end, stated in meta.notes. This is one part of the Victorian Street kit (Low-poly style, flat-lowpoly direction): Gaslight, soot and shop windows. Use ONLY the kit palette, by name: brick red #c32222, soot black #151619, bottle green #3a883a, brass #b28c34, brick red dark #821717, soot black dark #090a0b, brick red light #db5757, soot black light #3a3c40, 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 `fogLevel` (0–1, default 0.5) for the kit's "Fog level" 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 · 9

Railway arch
Brick piers and spandrels
Arch ring and keystones
String course and coping
Parapets
Ballast and rails
Soot streaks
Workshop shopfront
Bricked-up back wall

Note: Size at the default params: 10 m long (X), 8.48 m deep (Z) across the string course (8 m between the parapet faces), and 9.24 m tall to the parapet coping. The rail deck is at 8 m, the arch spans 8 m and springs at 3.05 m, and its crown is at 7.05 m. Snapping: the viaduct runs along +X from its snapping end at x = 0 to x = length, which is always whole metres, so it lands on the kit's 1 m grid. The origin is at the snapping end (x = 0, centred across the depth, y = 0). This replaces the library's usual bottom-centre origin, because the brief asks for an end origin on modular pieces. Both ends are flat, flush half piers, and the string course, coping, parapets, ballast and rails all stop exactly at the end planes. Two butted bays form one full 2 m pier, and the track runs on continuously. On its own, the side (±X) faces are therefore plain brick. The arch faces +Z, where the shopfront is. The GLB has 1,900 triangles in 20 meshes (merged per part and colour) and no animation clip. Normals are baked flat (non-indexed), so the facets survive in any engine. Every material is named exactly after its kit palette colour. At the defaults the GLB uses 10 of the 11 kit colours: soot black only appears when fogLevel is above 0.75. The exporter writes one material per mesh, so the same colour name appears on several materials: recolour by name. There is no text and no signage. The windows are opaque glass and the arch has no interior. Params are baked into the GLB at their defaults and only change geometry when the scene is rebuilt in the viewer. fogLevel (the kit's 'Fog level') is treated as the soot that smoke and fog leave behind. As it rises, the tapered drip streaks under the string course grow from 0.5 to 3.7 m (never past the arch ring), and above 0.75 the whole viaduct turns to sooted brick red dark with soot black streaks. The fog itself belongs to the viewer or street scene, not this model. length (8–14 m) widens the arch. On low decks, long bays flatten the arch into an ellipse so it stays under the string course: at 14 m long and a 7 m deck, it springs at 2.8 m with a 3.25 m rise. deckHeight (7–10 m) raises the deck and the springing line. shopfront 0 leaves the arch open as a through passage. glb-lint: 0 errors and 6 heuristic warnings: material count and duplicate materials (from the per-mesh materials), unindexed geometry (flat shading on purpose), sibling overlap and detached parts (the cornice, parapets and soot streaks are embedded 2 cm into the brick body on purpose, not floating), and scale (compared with the direction's 1 m reference). plan-check passes except for its part-id regex, which rejects the hyphens this library's slug-based ids need. The same plan with the slug de-hyphenated passes. three-check accepts those ids, and all 9 survive the GLB reload.

About the Railway arch 3D model

Railway arch is a free low-poly 3D model from the Victorian Street set. It measures 10 m × 9.2 m × 8.5 m (W × H × D) at real-world scale and is built from 1,900 triangles across 20 meshes, with 9 named parts. Download the 150 KB GLB and drop it into three.js, React Three Fiber, Godot or Blender — free for commercial use, no attribution required.

Is the Railway arch 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), 150 KB: 1,900 triangles, 5,700 vertices and 20 materials, modelled in metres at 10 m × 9.2 m × 8.5 m.
Can I animate Railway arch?: It ships as a static mesh. Its 9 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 Railway arch 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.