Is the Calendars 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), 288 KB: 3,808 triangles, 11,424 vertices and 23 materials, modelled in metres at 5.0 m × 3.5 m × 2.1 m.

Can I animate Calendars?

It ships as a static mesh. Its 7 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 Calendars 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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Calendars

A low-poly Aztec Calendar Round monument: the 365-day and 260-day calendars carved as two interlocking toothed stone wheels, pinned on wooden axles to a stepped stele crowned with red-capped merlons. The wheels are carved on both faces, so the piece looks finished from every side.

Original GLB288 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: 3,808
Vertices: 11,424
Meshes · materials: 23 · 23
Size (W × H × D): 5.0 m × 3.5 m × 2.1 m
File: GLB · 288 KB
Animation: Static
Style: Low-poly
Collection: Aztec Temple City

Palette · named materials

stone grey — plinth tiers, stele cornices, wheel inner plates#757e8a
stone grey dark — stele slab and plinth frame band#525860
stone grey light — wheel discs and teeth, merlons, front step#a3a5a8
turquoise — wheel day rings and stele frieze (carvingColour default)#31c4b8
feather red — 365-day wheel centre, marker month blocks, merlon caps#c32222
jade — 260-day wheel centre and 365-day wheel inner studs#389475
warm white — month blocks, number dots, frieze studs#f2ede2
soot black — wheel hub eyes#1b1b22
dark wood — axles#3d2a1c

Use it

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

const gltf = await new GLTFLoader().loadAsync(
  "https://assets.stoicsoft.com/1designtool/3d/models/aztec-temple-city-calendars/8405cdbe03/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:

Calendars for the Aztec Temple City 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 Aztec Temple City kit (Low-poly style, flat-lowpoly direction): A city on a lake with stepped pyramids. Use ONLY the kit palette, by name: stone grey #757e8a, turquoise #31c4b8, feather red #c32222, jade #389475, stone grey dark #525860, turquoise dark #22877e, stone grey light #a3a5a8, turquoise light #6dd5cc, 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 `carvingColour` (0–1, default 0.5) for the kit's "Carving colour" 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 · 7

Calendars
Two-tier plinth
Stepped stele
Merlon crest
365-day wheel (xiuhpohualli)
260-day wheel (tonalpohualli)
Wooden axles

Note: Size: 5.03 m wide (x), 2.12 m deep (z) and 3.48 m tall to the merlon caps. The big 365-day wheel is 2.06 m across over its teeth and the small 260-day wheel is 1.56 m. Both turn on axles 1.68 m above the ground. The front faces +Z, and the origin is at the bottom centre with the plinth resting on y = 0. The wheels are a stylised Calendar Round: 18 teeth and 18 month blocks on the big wheel, and 13 teeth and 13 number dots on the small one. They are not counted out to 365 and 260. Both wheels have the same tooth pitch, so the teeth really interlock. Both faces of the stele carry both wheels, so from the back the big wheel appears on the right. The exported model has 3,808 triangles in 23 meshes (merged per part and colour) and no animation clip. Normals are baked flat (non-indexed). Nine of the kit's 12 colours are used (mid grey, turquoise light and turquoise dark are not), and every material is named exactly after its palette colour. The exporter writes one material per mesh, so the same colour name appears on several materials: recolour by name. carvingColour (the kit's 'Carving colour') repaints both wheels' day rings and the stele frieze in steps: stone grey light (bare) → turquoise light → turquoise (default) → jade → feather red. Params are baked into the GLB at their defaults and only change geometry when the scene is rebuilt in the viewer. wheelSize scales both wheels together and keeps them meshed, which also widens and raises the stele. plinthHeight raises everything above the plinth, and merlons sets 0–4 crest merlons on each stele step. The param extremes were checked by reading the geometry limits, not by a capture. glb-lint: 0 errors and 6 heuristic warnings: material count, duplicate materials, unindexed geometry (flat shading on purpose), sibling overlap (frieze and cornice bands wrap the slab on purpose), detached parts (the axles run through the stele, so they are 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 7 survive the GLB reload.

About the Calendars 3D model

Calendars is a free low-poly 3D model from the Aztec Temple City set. It measures 5.0 m × 3.5 m × 2.1 m (W × H × D) at real-world scale and is built from 3,808 triangles across 23 meshes, with 7 named parts. Download the 288 KB GLB and drop it into three.js, React Three Fiber, Godot or Blender — free for commercial use, no attribution required.

Is the Calendars 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), 288 KB: 3,808 triangles, 11,424 vertices and 23 materials, modelled in metres at 5.0 m × 3.5 m × 2.1 m.
Can I animate Calendars?: It ships as a static mesh. Its 7 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 Calendars 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.