Low Poly Generator

About the Low Poly Generator

Low-poly art builds a picture from flat-coloured triangles, like a faceted gem or a 3D model with few polygons. This generator makes it two ways. From colours, it spreads points over the picture, joins them into triangles and colours each one from a gradient, with optional random variation and shading that makes the facets catch the light — a background or wallpaper at any size, from a phone screen to 4K. From a photo, it places more points along outlines and details, triangulates them, and gives each triangle the average colour of the pixels it covers.

Change the cell size, randomness and colours, or press New pattern for another arrangement; the seed keeps a picture you like reproducible. Draw the edges for a wireframe look, then download SVG (sharp at any size), PNG, WebP or JPG. Everything is drawn in your browser — the photo is never uploaded.

Common uses

• Desktop, phone and tablet wallpapers in your own colours.
• Website hero and section backgrounds, slide and video backdrops.
• Stylised posters, profile pictures and album art from your own photos.
• Placeholder graphics and textures for apps, games and mock-ups.

How the triangles are made

• Points: for a background, a grid of points in rows offset by half a cell — which with no randomness gives equilateral triangles — then each point is moved by up to half a cell in a random direction. For a photo, the edge strength of every pixel is measured with a Sobel filter; points are picked in proportion to it (or evenly, with low edge focus) and kept a minimum distance apart, so they gather on outlines without clumping.
• Triangles: the points are joined by a Delaunay triangulation — the triangulation in which no point lies inside the circle through any triangle’s three corners. It avoids long, thin slivers wherever the points allow, which is why low-poly art usually uses it. Points are also placed just outside the edges, so triangles run off the picture instead of leaving gaps.
• Colours: a background triangle takes the gradient’s colour at its centre, mixed in the OKLab colour space so the blend between two colours does not turn muddy. Shading gives every point a random height and lights each facet from the top left. A photo triangle gets the average colour of the pixels whose centres lie inside it.

Choosing the settings

The cell size sets how many triangles there are: small cells give a fine mosaic, large ones bold shapes. On a phone wallpaper, 40–80 px cells keep the facets visible on a small screen; on a 4K screen, 80–200 px. Randomness between 50% and 90% looks natural; below 20% the pattern turns geometric. For photos, 500–1,500 points give a stylised look and 4,000 or more keep faces recognisable; raise the edge focus to keep eyes, outlines and text sharper.

Which file to download

SVG is a vector file: it stays sharp at any size and opens in browsers, Figma, Illustrator and Inkscape — ideal for websites and print. Each triangle takes about 100 bytes, so a background with a few thousand triangles stays small. PNG is a lossless picture, WebP a smaller one for the web, and JPG suits photos and wallpapers; all three are drawn at the width and height you chose.

Limitations

• Photos are analysed at up to 1,000 px on their long side; the triangles are drawn sharp at any download size, but detail finer than that copy is averaged away.
• Up to 12,000 points from a photo and 40,000 for a background, so the page stays quick.
• PNG, WebP and JPG downloads are limited to 16,384 px on a side and 40 megapixels; SVG has no size limit.
• Triangles that cross the picture’s edge are cut off by it.
• HEIC photos open natively in Safari; other browsers first download a decoder from this site (1.4 MB, once).

Privacy

Everything happens in your browser. What you enter or open here is not uploaded or stored by MySmartCoPilot.