# One-line portraits with the Photo Spiral Engrave Generator

> your photo as a single spiral line, thick where dark

Spiral portraits are a party trick of vector math: a single line winds from the center outward, and its thickness modulates with the brightness of the photo beneath, fat through shadows, hair-thin across highlights. Up close it is an abstract spiral; at arm's length it is unmistakably the face.

Because the laser follows one continuous path instead of rastering thousands of rows, a spiral portrait engraves in a fraction of raster time. The tool runs entirely in your browser and also exports a printable relief where the spiral stands proud of a disc.

## What you need

- **Laser engraving:** laser cutter, fine-grained 3 mm [laser-grade plywood](https://yxecreations.com/collections/laser-grade-plywood) or two-tone [acrylic](https://yxecreations.com/pages/acrylic-sheets)
- **3D printing:** any FDM printer, one or two filament colors

## Step 1 - Upload a portrait



Open the tool and upload a photo. Tight head-and-shoulders crops with strong lighting work best; the spiral has limited bandwidth, so spend it all on the face. Adjust **Gamma**, **Brightness**, and **Contrast** until the preview reads clearly.

## Step 2 - Tune the spiral



- **Diameter** sets the physical size; 150 to 250 mm discs read well on a wall.
- **Spiral Spacing** is the gap between successive rings; tighter spacing means more resolution and longer engrave time.
- **Min Line Width** keeps highlight passes from vanishing; set it just above your laser's finest reliable line.
- **Max Line Width** caps the shadow swell; it must stay below Spiral Spacing or adjacent rings merge.
- Toggle the **Units** selector to design in mm or inches.

## Step 3 - Export



Download the **SVG** for engraving, or set **Base Thickness** and **Spiral Height** and export an **STL**/**3MF** to print the spiral as raised relief on a disc.

## Laser Engraving

### Engraving the spiral



1. Import the SVG; the spiral is a filled vector shape, so engrave it as a fill or, on capable machines, run it as a single heavy score for maximum speed.
2. Use fine-grained material; oak-style grain fights the delicate width changes.
3. Test a quarter-size version first to confirm your Min Line Width survives.
4. Engrave, then cut a circle just outside the spiral for a clean disc.
5. Hang with the spiral center at eye level; the image assembles as viewers step back.

## 3D Printing

### Printing a spiral relief



1. Set **Base Thickness** 2 to 3 mm and **Spiral Height** around 1 mm, then export the 3MF.
2. Keep Min Line Width at 0.5 mm or above so every ring is at least one extrusion wide.
3. Print base-down at 0.12 mm layers; swap to a dark filament at the spiral's first layer for instant contrast.
4. Black spiral on white base photographs exactly like ink art.
5. Side lighting makes the single-color version emerge from pure shadow.

## Make it yours

- Wedding-portrait spiral on a walnut disc, engraved in under ten minutes.
- Pet face spiral as a memorial ornament with a ribbon hole.
- Print a two-color spiral coaster set from four different family photos.
- Engrave on the lid of a keepsake box that holds the original photo.
- Giant version: tile a 400 mm spiral onto a tabletop slab.
- Spiral a band logo or album cover for music-room wall art.
- Pair with the Photo Halftone Generator: same portrait, two styles, hung side by side.
- Record-style gift: engrave the spiral on a 180 mm disc and frame it in a record sleeve.

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Open the Photo Spiral Engrave Generator: https://www.mylasertools.com/photo-spiral-generator
Read online: https://www.mylasertools.com/learn/guides/photo-spiral-generator