Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
More Japanese-inspired patterns, Gold Scales this time.
Source Josh Green
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Kaleidoscope Prismatic Abstract No Background
Source GDJ
Nice little grid. Would work great as a base on top of some other patterns.
Source Arno Gregorian
From a drawing in 'Hubert Montreuil, or the Huguenot and the Dragoon', Francisca Ouvry, 1873.
Source Firkin
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
Background Wall, Art Abstract, Star Well & CC0 texture.
Source Ractapopulous
The basic shapes never get old. Simple triangle pattern.
Source Atle Mo
This one is amazing, truly original. Go use it!
Source Viahorizon
Used in small doses, this could be a nice subtle pattern. Used on a large surface, it’s dirty!
Source Paul Reulat
Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Remixed from a design seen on Pixabay. The basic tile can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A pale orange background pattern with glossy groove stripes.
Source V. Hartikainen
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin
Fix side and a seamless pattern formed from circles.
Source SliverKnight
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
Mostly just mucked about with the colours and made one of the paths in the lead frame opaque. The glass remains transparent.
Source Firkin
Prismatic Groovy Concentric Background 3
Source GDJ