Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Prismatic Geometric Tessellation Pattern No Background
Source GDJ
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
From a drawing in 'Handbook of the excursions proposed to be made by the Lincoln Diocesan Architectural Society, on the 27th and 28th of May, 1857', Edward Trollope, 1857.
Source Firkin
The name is totally random, but hey, it sounds good.
Source Atle Mo
A seamless texture of worn out "cardboard".
Source V. Hartikainen
The original has been presented as black on transparent and stored in the pattern definitions. To retrieve the unit tile select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Not the Rebel alliance, but a dark textured pattern.
Source Hendrik Lammers
Submitted in a cream color, but you know how I like it.
Source Devin Holmes
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
Prismatic Geometric Pattern Background 2
Source GDJ
A free seamless background with pink spots.
Source V. Hartikainen
Bright Multicolored Floral Background by Karen Arnold from PDP.
Source GDJ
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Prismatic Groovy Concentric Background 5 No Black
Source GDJ
A very slick dark rubber grip pattern, sort of like the grip on a camera.
Source Sinisha
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
f you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
From a drawing in 'A Rolling Stone. A tale of wrongs and revenge', John Hartley, 1878.
Source Firkin
This one could be the shirt of a golf player. Angled lines in different thicknesses.
Source Olivier Pineda