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Coding · Intermediate

# Generating 3D printable models from rough sketches

Convert hand-drawn drawings and dimensional constraints into printable CAD code

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Opens BotBento. Paste the prompt into a bot; nothing is preconfigured.

- When you askReceive sketch and dimensions
- ThenGenerate parametric CAD script
- ResultReview model code and export

Turn hand-drawn concepts into physical objects by translating rough sketches and real-world dimensions into parametric CAD code. The bot interprets visual shapes, applies specified measurements and tolerances, and generates export-ready scripts for 3D slicing.

## Prompt to start with

BotBentoRecommended

```
When the user provides an image sketch along with key dimensions, analyze the geometry and write parametric CAD script code such as OpenSCAD or CadQuery. Ensure variable parameters for tolerances, peg sizes, and spacing are clearly exposed at the top of the file so dimensions can be tuned easily. Always display the generated code in chat for review before executing file saves or build scripts, and require explicit confirmation prior to writing files to disk.
```

Copy

## Tools it uses

ChatTerminal

## Works with

BotBento

## Tags

- 3d-printing
- cad
- prototyping
- diy

## Source

[Show HN: I turned a sketch into a 3D-print pegboard for my kid with an AI agent](https://news.ycombinator.com/item?id=47580910)
Hacker News · checked 2026-10-15

Summarized in our own words. Any results described there are the authors’ own, not measured by BotBento.

By BotBento Editorial · Added 2026-10-15 · Updated 2026-10-15 · [Suggest a correction](/contact/)

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