Is the Signals 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), 90 KB: 1,052 triangles, 3,156 vertices and 19 materials, modelled in metres at 2.1 m × 7.4 m × 1.2 m.

Can I animate Signals?

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 Signals 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

Signals

A low-poly Victorian railway semaphore signal: a tall cream timber post with a red-and-white signal arm, a spectacle with red and green lenses in front of a black oil lamp, a ladder and landing for the lamp man, and a balance-weight lever at the foot.

Original GLB90 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: 1,052
Vertices: 3,156
Meshes · materials: 19 · 19
Size (W × H × D): 2.1 m × 7.4 m × 1.2 m
File: GLB · 90 KB
Animation: Static
Style: Low-poly
Collection: Railway Station

Palette · named materials

signal red — arm face, danger lens#e90c0c
warm white — arm stripe and arm back, lamp glass#f2ede2
cream — timber post#f1e7d0
soot black — spindle, arm frame, spectacle, lamp, back stripe, down rod and lever#1b1b22
iron green dark — post collar, finial cap, lamp bracket, ladder, railing, balance weight#235223
iron green light — clear lens, finial ball#5db15d
dark wood — landing deck#3d2a1c
brick dark — footing cap#63261d
mid grey — stone footing (and the steel post at late era)#7d828c

Use it

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

const gltf = await new GLTFLoader().loadAsync(
  "https://assets.stoicsoft.com/1designtool/3d/models/railway-station-signals/c579f7caf9/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:

Signals for the Railway Station 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 Railway Station kit (Low-poly style, flat-lowpoly direction): Platforms, signals and a grand hall. Use ONLY the kit palette, by name: brick #9e3d2e, iron green #3a883a, cream #f1e7d0, signal red #e90c0c, brick dark #63261d, iron green dark #235223, brick light #c66253, iron 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 `era` (0–1, default 0.5) for the kit's "Era" 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 · 9

Semaphore signal
Footing and collar
Signal post
Finial
Signal arm
Spectacle and lenses
Lamp and bracket
Ladder and landing
Down rod and balance lever

Note: Size at the default params: about 2.15 m wide (X, the arm reaching 1.6 m to -X of the post) × 1.0 m deep (Z, mostly the ladder on the back) × 7.39 m tall to the finial, with a 7 m post, a 1.3 m × 0.3 m arm whose spindle sits 6.15 m up and a lamp-man's landing 4.6 m up. The arm's red face looks along +Z (towards the approaching driver); the back of the arm is white with a black stripe as on the real thing. The origin is the bottom centre of the bounding box (not the post axis, which sits about 0.5 m to +X of it because of the arm), and the model rests on y = 0. The GLB has 1,052 triangles in 19 meshes (merged per part and colour), normals baked flat (non-indexed), and no animation clip. Every material is named exactly after its kit palette colour; 9 of the 12 kit colours are used. The exporter writes one material per mesh, so the same name appears on several materials: recolour by name. Params are baked at their defaults and only change geometry when rebuilt in the viewer; the arm is fixed geometry, not a rotatable node. era (the kit's 'Era') runs from an early timber-post lower-quadrant signal with a ball-and-spike finial (0–0.35), through a timber post with a ball finial (default), to a tubular steel post with an upper-quadrant arm and a plain cap (from 0.65). postHeight is 4.5–9 m, arms adds a second arm below the first (1–2), and aspect swings the arm 45° to clear and brings the green lens in front of the lamp. glb-lint: 0 errors and 6 heuristic warnings (non-indexed flat-shaded geometry, duplicate per-mesh materials, intended overlap of the arm's stacked red/white/stripe layers, finial meshes that sit on the post in another part, and scale against 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. Param extremes (era 0 and 1, two arms, aspect 1, post 4.5 and 9 m) were run through three-check and pass.

About the Signals 3D model

Signals is a free low-poly 3D model from the Railway Station set. It measures 2.1 m × 7.4 m × 1.2 m (W × H × D) at real-world scale and is built from 1,052 triangles across 19 meshes, with 9 named parts. Download the 90 KB GLB and drop it into three.js, React Three Fiber, Godot or Blender — free for commercial use, no attribution required.

Is the Signals 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), 90 KB: 1,052 triangles, 3,156 vertices and 19 materials, modelled in metres at 2.1 m × 7.4 m × 1.2 m.
Can I animate Signals?: 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 Signals 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.