# wireframe-to-3d

Turns orthographic wireframe PNGs into a Blender 3D model and exports it as .glb. Useful when you have front and side views but no mesh yet.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 787 installs · ★ 125
- Author: RobLe3
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/RobLe3/cc-blender-skill/tree/HEAD/skill/wireframe-to-3d/SKILL.md
- Updated: 2026-10-12
- HTML: https://affpapa.org/en/nevibecode/skills/wireframe-to-3d

## What it does

The skill runs a four-stage pipeline. First `scripts/wireframe_analyzer.py` parses the PNG locally with OpenCV and returns Bezier control points as JSON. Then the agent writes Blender Python, runs it through `mcp__blender__execute_blender_code`, converts curves to meshes with PBR materials, and exports GLB.

The environment gets checked before anything else. The Blender MCP addon has to be running on port 9876 — if `mcp__blender__get_scene_info` fails, the skill stops and asks you to enable the addon. Python needs `opencv-python`, `numpy` and `scipy`. Feed it at least one PNG of 400×400 px or larger with black-and-white line art.

A single view only gives you flat extrusion, so you supply the depth yourself. Full reconstruction comes from a front plus side pair, and a back view is used to validate symmetry. The default detail level is `production`: roughly 5–8k triangles and a 2–4 MB GLB.

## Requirements
- Works with: Blender

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add RobLe3/cc-blender-skill --skill wireframe-to-3d -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/wireframe-to-3d/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/wireframe-to-3d/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add RobLe3/cc-blender-skill --skill wireframe-to-3d -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/wireframe-to-3d/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add RobLe3/cc-blender-skill --skill wireframe-to-3d -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/wireframe-to-3d/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install RobLe3/cc-blender-skill wireframe-to-3d
```

2. **Manually: put the files in place**
- File: `.github/skills/wireframe-to-3d/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add RobLe3/cc-blender-skill --skill wireframe-to-3d -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/RobLe3/cc-blender-skill --path skill/wireframe-to-3d
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/wireframe-to-3d/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add RobLe3/cc-blender-skill --skill wireframe-to-3d -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/RobLe3/cc-blender-skill/tree/HEAD/skill/wireframe-to-3d/SKILL.md

## When to use it
- build a 3D mesh from front and side drawings
- export the model as a `.glb` file
- turn PNG Bezier contours into parametric Blender curves
- tune mesh density to fit a file size budget
- validate model symmetry against a back view

## Example prompts
- make a 3D model from these drawings: front.png and side.png
- convert this wireframe to 3D and export a GLB
- build the model from the orthographic views, detail level high

## Source text · SKILL.md · MIT

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: 3c3f4321a6654542.

BEGIN THIRD-PARTY FILE 3c3f4321a6654542
````text
---
name: wireframe-to-3d
description: Convert 2D orthographic wireframe PNG drawings to 3D Blender models exported as glTF/GLB. Use this skill whenever the user provides wireframe images (technical drawings, line drawings, orthographic views, side/front/back panels) and wants to generate a 3D model, mesh, or .glb file. Triggers on phrases like "convert this wireframe to 3D", "make a 3D model from these drawings", "build a model from this wireframe", "generate GLB from these views", or any image-to-3D-mesh request involving line drawings. Make sure to use this skill even if the user does not explicitly say "wireframe" — also covers "orthographic views", "technical drawings", "line drawings of objects", "front and side views". Requires the Blender MCP addon to be running (port 9876) and Python with opencv-python, numpy, scipy installed.
when_to_use: User provides one or more PNG wireframe images and wants a 3D model. Also use when user asks to model an object from front/side/back drawings, or to convert technical line art to glTF/GLB.
allowed-tools: Read Bash Glob Grep mcp__blender__execute_blender_code mcp__blender__get_scene_info mcp__blender__get_object_info mcp__blender__get_viewport_screenshot
---

# Wireframe-to-3D Conversion

Convert 2D orthographic wireframe images to parametric 3D Blender models, exported as glTF 2.0 binary (`.glb`).

## Overview

The skill drives a four-stage pipeline:
1. **Analyze** wireframe images locally with `scripts/wireframe_analyzer.py` (OpenCV → Bezier control points in JSON).
2. **Generate** Blender Python code that recreates the contours as parametric Bezier curves.
3. **Execute** code in Blender via `mcp__blender__execute_blender_code`, converting curves to meshes with PBR materials.
4. **Export** as optimized GLB (≤ 15 MB), validating size and topology.

You (Claude) are the orchestrator. The `scripts/` directory contains the only standalone code (`wireframe_analyzer.py`); everything else is patterns you emit and run via MCP.

## Prerequisites — check first

Before any wireframe work, verify the environment:

1. **Blender MCP is reachable**. Call `mcp__blender__get_scene_info`. If it errors with "Could not connect to Blender", stop and tell the user:
   > "Blender's MCP addon isn't running. Start Blender, enable the BlenderMCP addon (port 9876), then re-run."

2. **Python deps for the analyzer**. Run:
   ```
   python3 -c "import cv2, numpy, scipy" 2>&1
   ```
   If it errors, run `pip install opencv-python numpy scipy Pillow` (or instruct the user to).

3. **Image input**. Confirm the user provided at least one PNG. Reasonable bounds: ≥ 400×400 px, black-on-white or white-on-black line art.

## Decision flow

### Q1: How many views?
- **Single view** → flat 2D extrusion only (warn the user; depth must be supplied or assumed).
````
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