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Figure — broken part, plain English, new STL
EddieLomax · 2026-06-02 · via Hacker News: Show HN

Desktop app

Figure is a desktop app for designing printable parts. Describe what you need, tweak the sliders, export the STL. The geometry is generated locally — OpenSCAD runs underneath.

The Figure app showing a 3D model of a replacement knob being designed from a chat conversation, with parameter sliders on the right.

How it works

From a description to a printed part, in three motions.

No CAD to learn. No code to read. The workflow is the conversation; the geometry follows.

Step 01

Describe what broke.

Type it, upload a photo, or drag in an STL. Plain English works — measurements help.

Step 02

The geometry takes shape.

The model builds from your description. Nudge it with sliders — no CAD, no commands, no code.

Step 03

Export and print.

Hit Export STL. Slice it in your usual tool. Print, fit-check, adjust if needed.

From the wild

Parts people actually printed.

Real outputs from the app — from a photo of a broken part to a one-line request, with room to iterate until it fits.

Example 01 — From a photo

A replacement fan knob.

Reconstructed from a photo of the broken original. Measured with calipers, fit-tested on the third try.

"The oval bore (5.25 × 6.25 mm + 0.2 mm tolerance) runs through the entire piece to grip the splined shaft."

A 3D rendering of a small cylindrical knob inside the Figure app, with parameter sliders for knob diameter, height, shaft size, and bore tolerance.

A 3D rendering of a knurled volume knob inside the Figure app in dark mode, with sliders for diameter, height, shaft, D-flat depth, and knurl count.

Example 02 — From a description

A stereo volume knob.

Built from one paragraph of description. Knurled grip, flat top, D-shaped bore — generated, then tuned to the shaft.

"A round plastic knob, about 35 mm wide and 20 mm tall, with a D-shaped hole from the bottom to center for a shaft. Make it look nice — flat top, knurled around the circumference."

Example 03 — From iteration

A screw-top jar and lid.

Started with a rough jar shape, then refined the threads and print orientation through back-and-forth in chat — helical threads, not concentric rings.

"The threads are concentric circles instead of spiral threads. Also the lid is upside down — the flat side should be on the print bed."

The Figure app showing a split view of a screw-top jar before and after thread refinement, with sliders for outer diameter, thread pitch, and wall thickness.

The Figure app showing a 3D model of a soda can lid with a pull tab, with sliders for rim diameter, grip depth, wall thickness, and tab length.

Example 04 — From a description

A soda can lid.

One sentence in chat. Standard can dimensions, a pull tab for easy removal, oriented flat-side-down so it prints without supports.

"i need a lid for a soda can"

Example 05 — From a back-and-forth

A 45 RPM record adapter.

A disc for the large hole in a 45 — center bore for the spindle, slight taper on top. One clarifying question in chat, then dialed in with sliders.

"Should the middle hole be a simple round circle, or does it need a special shape?" — "simple round circle"

The Figure app showing a 3D model of a 45 RPM record adapter disc, with sliders for outer diameter, inner bore diameter, and height.

Works with your setup

Your model, your key, your machine.

The app collects zero data and runs no telemetry. Figure connects to the model provider you already pay for. Geometry is generated locally with OpenSCAD — nothing is rendered in a cloud you don't control.

  • Bring your own API key. Stored securely on your device. Never sent to us — we don't run a server.

  • OpenSCAD runs locally. The geometry engine ships inside the app. Your descriptions and STLs stay on your machine.

  • No subscription. No account. You pay your model provider for tokens; that's it.

  • Zero data collection. No telemetry. The app doesn't phone home — no usage tracking, crash reports, or analytics.

Figure app icon

Print the part.

Beta available for Mac on Apple Silicon (ARM64) as a disk image. No account required.