Is the Start lights 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), 151 KB: 1,576 triangles, 4,728 vertices and 31 materials, modelled in metres at 3.1 m × 5.8 m × 1.6 m.

Is Start lights animated?

Yes — the GLB carries a baked animation (8.0 s), ready to play with any glTF animation mixer.

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 Start lights 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

Start lights

A low-poly trackside start-light tower: a black five-column box of hooded lamps on a T-head yoke, carried by a single steel post with team livery bands and a control cabinet, on a concrete footing. An 8-second loop runs the race start: all lit, lights out, then the columns light one by one.

Original GLB151 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: 1,576
Vertices: 4,728
Meshes · materials: 31 · 31
Size (W × H × D): 3.1 m × 5.8 m × 1.6 m
File: GLB · 151 KB
Animation: scene-motion · 8.0s
Style: Low-poly
Collection: Racing Circuit

Palette · named materials

body#1b1b22
base#34373d
trim#101113
trim#5c5d61
base#7d828c
accent#988e81
trim#f4f1ec
trim#d7cebc
accent#f9f8f6
accent#f2ede2

Use it

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

const gltf = await new GLTFLoader().loadAsync(
  "https://assets.stoicsoft.com/1designtool/3d/models/racing-circuit-start-lights/5d6b6d0ffa/model.glb"
);
scene.add(gltf.scene); // metres, +Y up, front faces +Z

const mixer = new THREE.AnimationMixer(gltf.scene);
gltf.animations.forEach((clip) => mixer.clipAction(clip).play());
// in your loop: mixer.update(delta)

How it was made

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

Start lights for the Racing Circuit 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 moves: author a seamless baked loop (2–12 s) with every pivot exactly at its hinge, axle or swivel, and keep the base still. This is one part of the Racing Circuit kit (Low-poly style, flat-lowpoly direction): Speed, pit stops and crowds. Use ONLY the kit palette, by name: tarmac #34373d, kerb red and white #f4f1ec, flag colours #988e81, grass #539b3b, tarmac dark #101113, kerb red and white dark #d7cebc, tarmac light #5c5d61, kerb red and white light #f9f8f6, 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 `teamLiveries` (0–1, default 0.5) for the kit's "Team liveries" 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 abstract-kinetic
three-check PASS · glb-lint PASS

Make your own with 1DesignTool →

Named parts · 11

Start lights
Concrete footing
Post
Control cabinet
Head yoke
Light housing
Lamp column 1
Lamp column 2
Lamp column 3
Lamp column 4
Lamp column 5

Note: Size: about 3.1 m wide (X), 1.6 m deep (Z, the footing) and 5.84 m tall at the default params. The lamp face looks toward +Z. The origin is at the bottom centre of the concrete footing, which rests on y = 0. The GLB is baked at the default params: 1,576 triangles in 31 meshes, with one seamless 8 s clip called 'scene-motion'. From 0 to 1.5 s all five columns are lit. Then the lights go out, column n lights at 2 + n s (left to right as the grid sees it), and all five hold into the wrap. A dark column's lit lenses slide 12 cm back inside the housing, so the clip uses translation only and has no hinged pivots. The footing, post, cabinet, yoke and housing never move. The lit lamps are flat pale discs, not light sources, because the kit palette has no red. Every material is named after its kit palette colour, so you can recolour by name. The exporter writes one material per mesh, so some names repeat. Team liveries (the kit knob): 0 to 1 adds 0 to 4 flag-colour bands up the post (fewer fit on a short post), and above 0.1 it paints the housing cheek plates and sill strip in flag colours. postHeight, lampRows and hoodDepth rebuild the model in the viewer only; the GLB carries the defaults. The extremes were checked with three-check (PASS). glb-lint: 0 errors. Its warnings are expected heuristics: merged parts that read as detached, nested overlaps, non-indexed flat-shaded geometry and the 1 m scale heuristic. It ends 'UNVERIFIED' only because no requirements contract is supplied. plan-check rejects only the hyphenated library part ids, because its regex allows no hyphen in the first segment. A de-hyphenated copy of the plan passes.

About the Start lights 3D model

Start lights is a free animated low-poly 3D model from the Racing Circuit set. It measures 3.1 m × 5.8 m × 1.6 m (W × H × D) at real-world scale and is built from 1,576 triangles across 31 meshes, with 11 named parts and a baked animation (8.0 s). Download the 151 KB GLB and drop it into three.js, React Three Fiber, Godot or Blender — free for commercial use, no attribution required.

Is the Start lights 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), 151 KB: 1,576 triangles, 4,728 vertices and 31 materials, modelled in metres at 3.1 m × 5.8 m × 1.6 m.
Is Start lights animated?: Yes — the GLB carries a baked animation (8.0 s), ready to play with any glTF animation mixer.
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 Start lights 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.