Image to Three.js Model
img2threejs/img2threejs
Rebuilds the object in a reference image as a procedural, animation-ready Three.js model written entirely in code, using staged sculpting with quality checks.
create robust, browser-runnable three.js primitive reconstructions from static low-poly, voxel, isometric, or stylized game-art reference images.
Install Threejs Primitive Reconstructor
$ npx skills add jasonkneen/tiny-world-builder --skill threejs-primitive-reconstructor -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install jasonkneen/tiny-world-builder threejs-primitive-reconstructor --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/jasonkneen/tiny-world-builder.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.codex/skills/threejs-primitive-reconstructor .claude/skills/threejs-primitive-reconstructor && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "threejs-primitive-reconstructor" agent skill from https://github.com/jasonkneen/tiny-world-builder/tree/main/.codex/skills/threejs-primitive-reconstructor into .claude/skills/threejs-primitive-reconstructor/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "threejs-primitive-reconstructor", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/jasonkneen/tiny-world-builder/tree/main/.codex/skills/threejs-primitive-reconstructorType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add jasonkneen/tiny-world-builder --skill threejs-primitive-reconstructor -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install jasonkneen/tiny-world-builder threejs-primitive-reconstructor --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/jasonkneen/tiny-world-builder.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.codex/skills/threejs-primitive-reconstructor .agents/skills/threejs-primitive-reconstructor && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "threejs-primitive-reconstructor" agent skill from https://github.com/jasonkneen/tiny-world-builder/tree/main/.codex/skills/threejs-primitive-reconstructor into .agents/skills/threejs-primitive-reconstructor/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "threejs-primitive-reconstructor", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add jasonkneen/tiny-world-builder --skill threejs-primitive-reconstructor -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install jasonkneen/tiny-world-builder threejs-primitive-reconstructor --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/jasonkneen/tiny-world-builder.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.codex/skills/threejs-primitive-reconstructor .cursor/skills/threejs-primitive-reconstructor && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "threejs-primitive-reconstructor" agent skill from https://github.com/jasonkneen/tiny-world-builder/tree/main/.codex/skills/threejs-primitive-reconstructor into .cursor/skills/threejs-primitive-reconstructor/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "threejs-primitive-reconstructor", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/jasonkneen/tiny-world-builder.git --path .codex/skills/threejs-primitive-reconstructor--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add jasonkneen/tiny-world-builder --skill threejs-primitive-reconstructor -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install jasonkneen/tiny-world-builder threejs-primitive-reconstructor --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/jasonkneen/tiny-world-builder.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.codex/skills/threejs-primitive-reconstructor .gemini/skills/threejs-primitive-reconstructor && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "threejs-primitive-reconstructor" agent skill from https://github.com/jasonkneen/tiny-world-builder/tree/main/.codex/skills/threejs-primitive-reconstructor into .gemini/skills/threejs-primitive-reconstructor/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "threejs-primitive-reconstructor", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install jasonkneen/tiny-world-builder threejs-primitive-reconstructorInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add jasonkneen/tiny-world-builder --skill threejs-primitive-reconstructor -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/jasonkneen/tiny-world-builder.git skills-src && mkdir -p .github/skills && cp -r skills-src/.codex/skills/threejs-primitive-reconstructor .github/skills/threejs-primitive-reconstructor && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "threejs-primitive-reconstructor" agent skill from https://github.com/jasonkneen/tiny-world-builder/tree/main/.codex/skills/threejs-primitive-reconstructor into .github/skills/threejs-primitive-reconstructor/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "threejs-primitive-reconstructor", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add jasonkneen/tiny-world-builder --skill threejs-primitive-reconstructor -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install jasonkneen/tiny-world-builder threejs-primitive-reconstructor --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/jasonkneen/tiny-world-builder.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.codex/skills/threejs-primitive-reconstructor .opencode/skills/threejs-primitive-reconstructor && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "threejs-primitive-reconstructor" agent skill from https://github.com/jasonkneen/tiny-world-builder/tree/main/.codex/skills/threejs-primitive-reconstructor into .opencode/skills/threejs-primitive-reconstructor/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "threejs-primitive-reconstructor", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
threejs-primitive-reconstructor- GitHub stars
- 1.6k
- Token cost
- ~1.1k tokens
- SKILL.md length
- 543 words
- Files
- 5 (incl. scripts, references, assets)
- Skills in repo
- 29
- Repo updated
- First seen
- Licence
- AGPL-3.0
At a glance
create robust, browser-runnable three.js primitive reconstructions from static low-poly, voxel, isometric, or stylized game-art reference images.
- Works in 8 steps: Inspect the reference image visually… → Produce a short analysis inventory in… → Generate one plain .html file, not… → …
- The user asks to turn an image
- SKILL.md covers Core workflow, Required analysis inventory, Coding rules and Reference and template files, plus 2 more sections
- Runs Python scripts from its folder; calls python3
What it does
Threejs Primitive Reconstructor is an agent skill from jasonkneen/tiny-world-builder. create robust, browser-runnable three.js primitive reconstructions from static low-poly, voxel, isometric, or stylized game-art reference images. use when the user asks to turn an image or prompt into a three.js/html asset, generate a primitive-only scene, debug non-rendering three.js output, or produce a reusable prompt/template for low-poly three.js reconstruction.
Its SKILL.md is about 1.1k tokens, which your agent loads only when the skill is triggered. The skill folder holds 8 other files, including scripts, reference files and assets (for example `agents/openai.yaml`, `references/reconstruction-prompt.md` and `scripts/write_scene_from_template.py`).
It sits in Game Development, covering 3D graphics and WebGL. It works with Three.js. The licence is AGPL-3.0.
When your agent uses it
- The user asks to turn an image
- Prompt into a three.js/html asset
- Generate a primitive-only scene
- Debug non-rendering three.js output
Example prompts
- “/threejs-primitive-reconstructor”
Requirements
- Python 3
Workflow steps
8 steps, taken from the first numbered list in SKILL.md.
- Inspect the reference image visually before coding.
- Produce a short analysis inventory in the response and include the same inventory as a comment block at the top of the script.
- Generate one plain .html file, not React, JSX, iframe, or srcDoc.
- Use only primitive geometry: BoxGeometry, CylinderGeometry, ConeGeometry, SphereGeometry, Group, and MeshStandardMaterial.
- Use the import-map loading pattern from assets/threejs-scene-template.html.
- Keep objects aligned to integer or half-integer tile coordinates when reconstructing grid-based scenes.
- Add soft shadows, matte materials, and an immediate camera view where the asset is visible without user adjustment.
- When the user reports a loading or rendering error, first replace CDN/import patterns and wrappers with the robust plain HTML template in…
What it can do on your machine
Read from SKILL.md and the folder at commit a2a1129. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Ships 1 file in scripts/ (Python), which the agent can run.
Shell commands in SKILL.md call:
python3
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Threejs Primitive Reconstructor loads about 1.1k tokens when it runs, and up to ~2.3k if it reads all its reference files. Until then it costs about 100 tokens; SKILL.md has 543 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.
SKILL.md
The full file from jasonkneen/tiny-world-builder at commit a2a1129, republished under its AGPL-3.0 licence (© jasonkneen). 543 words, ~1,136 tokens.
Download SKILL.mdSave it as
.claude/skills/threejs-primitive-reconstructor/SKILL.md (or your agent's skills folder). This skill also uses 4 other files; get the full folder from GitHub.- name
- threejs-primitive-reconstructor
- description
- create robust, browser-runnable three.js primitive reconstructions from static low-poly, voxel, isometric, or stylized game-art reference images. use when the user asks to turn an image or prompt into a three.js/html asset, generate a primitive-only scene, debug non-rendering three.js output, or produce a reusable prompt/template for low-poly three.js reconstruction.
Three.js Primitive Reconstructor
Core workflow
Use this skill to generate a reliable single-file Three.js HTML scene from a low-poly, voxel, isometric, or stylized 3D reference image.
- Inspect the reference image visually before coding.
- Produce a short analysis inventory in the response and include the same inventory as a comment block at the top of the script.
- Generate one plain
.htmlfile, not React, JSX, iframe, orsrcDoc. - Use only primitive geometry:
BoxGeometry,CylinderGeometry,ConeGeometry,SphereGeometry,Group, andMeshStandardMaterial. - Use the import-map loading pattern from
assets/threejs-scene-template.html. - Keep objects aligned to integer or half-integer tile coordinates when reconstructing grid-based scenes.
- Add soft shadows, matte materials, and an immediate camera view where the asset is visible without user adjustment.
- When the user reports a loading or rendering error, first replace CDN/import patterns and wrappers with the robust plain HTML template in
assets/threejs-scene-template.html.
Required analysis inventory
Before the code, summarize:
- Camera and framing: projection feel, camera type, azimuth/elevation, crop/centering.
- Palette: 8-15 hex colors visible in the reference.
- Ground/podium: grid size, tile size, base thickness, grass variation, water/path positions.
- Structures: type, grid position, footprint, height, wall/roof colors, distinguishing features.
- Nature: trees, bushes, flowers, rocks, grass tufts, size variation.
- Farm/details: crops, stairs, doors, windows, fence rails, small props.
- Sky/atmosphere: sky color, fog, clouds/smoke.
- Animation: optional rotation, drifting clouds, rising smoke, water shimmer.
Coding rules
- Use one self-contained
.htmlfile. - Use an import map with
unpkg.comexactly as shown inassets/threejs-scene-template.html. - Import with
import * as THREE from 'three'andOrbitControlsfromthree/addons/controls/OrbitControls.js. - Do not use
esm.sh,cdn.jsdelivr, relative Three.js module paths, React, JSX, iframe, orsrcDoc. - Do not use external assets, textures, GLTF, OBJ, FBX, SVG, or postprocessing.
- Use
MeshStandardMaterialthroughout; defaultroughness: 1andmetalness: 0. - Set
renderer.outputColorSpace = THREE.SRGBColorSpace. - Enable
renderer.shadowMap.enabled = trueandTHREE.PCFSoftShadowMap. - Add a resize listener.
- Append
renderer.domElementdirectly todocument.body. - Keep comments sentence case.
- Keep the generated file under roughly 500 lines unless the user asks for more detail.
Show full SKILL.md (211 more words)Show less
Reference and template files
- Read
references/reconstruction-prompt.mdwhen the user wants the reusable prompt or prompt wording. - Use
assets/threejs-scene-template.htmlas the starting point for generated HTML. - Use
scripts/write_scene_from_template.pyonly when a quick local template copy is useful; customize the copied file afterward.
Debugging non-rendering output
If a generated scene does not render:
- Remove React, JSX, iframe, and
srcDocwrappers. - Replace module imports with the import-map pattern in the template.
- Confirm the file is served through a local server, for example
python3 -m http.server 8000, then opened athttp://localhost:8000/scene.html. - Confirm
renderer.domElementis appended todocument.body. - Confirm the camera points at the asset and the object is near the origin.
- Simplify animation until a static render works.
Cottage reference shortcut
For the cropped cottage reference, reconstruct:
- A 5 by 5 floating grass tile island with a brown dirt base.
- A front-left water strip slightly below grass level.
- One warm yellow cottage centered slightly back-left.
- A bright blue hipped roof with dark blue ridge/caps.
- A tall chimney with four rising smoke puffs.
- A brown front door, cyan windows with dark frames, and exterior stone stairs on the right.
- A wooden fence around the front/right/back of the yard.
- Grass tufts, small white/yellow flowers, sky-blue background, soft shadows, and matte materials.
© jasonkneen, AGPL-3.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 4 other files (scripts, references, assets) in .codex/skills/threejs-primitive-reconstructor of jasonkneen/tiny-world-builder.
- SKILL.md
- agents/openai.yaml
- assets/threejs-scene-template.html
- references/reconstruction-prompt.md
- scripts/write_scene_from_template.py
Open the folder on GitHubat commit a2a1129
Compare with similar skills
Threejs Primitive Reconstructor next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Threejs Primitive Reconstructor this skilljasonkneen/tiny-world-builder | 1.6k | — | ~1.1k | Automated safety check: Pass | AGPL-3.0 | |
| Image to Three.js Modelimg2threejs/img2threejs | 18k | 1 repos | ~8.2k | Automated safety check: Pass | Apache-2.0 | |
| Web CloneJane-xiaoer/claude-skill-web-clone | 1k | 1 repos | ~2.7k | Automated safety check: Pass | MIT | |
| Threejs Game Directormajidmanzarpour/threejs-game-skills | 2.5k | — | ~2.2k | Automated safety check: Pass | MIT | |
| Threejs Gameplay Systemsvalkor-ai/loom | 1.2k | 1 repos | ~1.4k | Automated safety check: Pass | Apache-2.0 | |
| Threejs World Generationcalesthio/OpenMontage | 66k | — | ~2k | Automated safety check: Pass | AGPL-3.0 |
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Questions about Threejs Primitive Reconstructor
What does Threejs Primitive Reconstructor do?
create robust, browser-runnable three.js primitive reconstructions from static low-poly, voxel, isometric, or stylized game-art reference images. Threejs Primitive Reconstructor is an agent skill from jasonkneen/tiny-world-builder.js primitive reconstructions from static low-poly, voxel, isometric, or stylized game-art reference images.
When should I use Threejs Primitive Reconstructor?
Threejs Primitive Reconstructor fits situations like: the user asks to turn an image; prompt into a three.js/html asset; generate a primitive-only scene; debug non-rendering three.js output.
How do I install Threejs Primitive Reconstructor in Claude Code?
Run `npx skills add jasonkneen/tiny-world-builder --skill threejs-primitive-reconstructor -a claude-code`. Or copy the skill folder (.codex/skills/threejs-primitive-reconstructor in jasonkneen/tiny-world-builder) into .claude/skills/threejs-primitive-reconstructor in your project. Claude Code loads it when a task matches its description.
How do I install Threejs Primitive Reconstructor in Codex?
Run `npx skills add jasonkneen/tiny-world-builder --skill threejs-primitive-reconstructor -a codex`. Or copy the skill folder (.codex/skills/threejs-primitive-reconstructor in jasonkneen/tiny-world-builder) into .agents/skills/threejs-primitive-reconstructor in your project. Codex loads it when a task matches its description.
Can I use Threejs Primitive Reconstructor in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add jasonkneen/tiny-world-builder --skill threejs-primitive-reconstructor -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/threejs-primitive-reconstructor, .gemini/skills/threejs-primitive-reconstructor, .github/skills/threejs-primitive-reconstructor and .opencode/skills/threejs-primitive-reconstructor in your project.
What does Threejs Primitive Reconstructor need to run?
Going by SKILL.md and its folder, Threejs Primitive Reconstructor needs Python for the scripts in its folder and the command-line tools its instructions call (python3). Our summary lists: Python 3.
Does Threejs Primitive Reconstructor access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Threejs Primitive Reconstructor safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.
What licence does Threejs Primitive Reconstructor use?
Threejs Primitive Reconstructor is published under the AGPL-3.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Threejs Primitive Reconstructor use?
About 1.1k tokens (SKILL.md is roughly 4.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 1.2k tokens, read only when the agent opens those files.
What are the alternatives to Threejs Primitive Reconstructor?
Skills that share tags, products or a category with Threejs Primitive Reconstructor: Image to Three.js Model (img2threejs/img2threejs, 18k stars), Web Clone (Jane-xiaoer/claude-skill-web-clone, 1k stars), Threejs Game Director (majidmanzarpour/threejs-game-skills, 2.5k stars) and Threejs Gameplay Systems (valkor-ai/loom, 1.2k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Threejs Primitive Reconstructor?
jasonkneen (a GitHub user) maintains it in jasonkneen/tiny-world-builder, which has 1,590 GitHub stars. The repository holds 29 skills in this directory. The repository was last updated on October 9, 2026.
Source: jasonkneen/tiny-world-builder on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.