A re-make of the Gradient Squares pattern.
Source Dimitar Karaytchev
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Prismatic Hexagonalism Pattern No Background
Source GDJ
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
A re-make of the Gradient Squares pattern.
Source Dimitar Karaytchev
Remixed from a drawing in 'The March of Loyalty', Letitia MacClintock, 1884.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
From a drawing in 'Hubert Montreuil, or the Huguenot and the Dragoon', Francisca Ouvry, 1873.
Source Firkin
Greyscale version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Remixed from a drawing in 'Prehistoric Man: researches into the origin of civilisation in the old and the new world', Daniel Wilson, 1876.
Source Firkin
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
The file was named striped lens, but hey – Translucent Fibres works too.
Source Angelica
A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
Colour version of the original pattern inspired by the front cover of 'Old and New Paris', Henry Edwards, 1894.
Source Firkin
This reminds me of Game Cube. A nice light 3D cube pattern.
Source Sander Ottens
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
This one could be the shirt of a golf player. Angled lines in different thicknesses.
Source Olivier Pineda
A large pattern with funky shapes and form. An original. Sort of origami-ish.
Source Luuk van Baars
Formed from decorative divider 184 in paint.net. Vectorised with Vector Magic.
Source Firkin
The original enhanced with one of Inkscapes's filters.
Source Firkin
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
An emulated “transparent” background pattern, like that of all kinds of computer graphics software.
Source AdamStanislav
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin