A nice one indeed, but I have a feeling we have it already? If you spot a copy, let me know on Twitter.
Source Graphiste
There are many carbon patterns, but this one is tiny.
Source Designova
Prismatic Groovy Concentric Background 2
Source GDJ
From a drawing in 'A Life Interest', Mrs Alexander, 1888.
Source Firkin
A seamlessly repeating background pattern of wood. The image is procedurally generated, and, I think, it's turned out quite well.
Source V. Hartikainen
Remixed from a PNG that was uploaded to Pixabay by VictorianLady
Source Firkin
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
A heavy dark gray base, some subtle noise and a 45-degree grid makes this look like a pattern with a tactile feel to it.
Source Atle Mo
A bit of scratched up grayness. Always good.
Source Dmitry
A seamless striped fabric-like texture colored in a dark reddish brown color.
Source V. Hartikainen
On a large canvas you can see it tiling, but used on smaller areas, it’s beautiful.
Source Paul Phönixweiß
Prismatic Abstract Geometric Background 2 No Black
Source GDJ
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Zero CC tileable ground cracked, crackled, texture, made by me.
Source Sojan Janso
A seamless pattern formed from a modified version of rwwgub's tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A light gray background pattern with seamless fabric-like texture and almost unnoticeable stripes.
Source V. Hartikainen
A seamless green background texture. The image is distributed under a Creative Commons License (like all of the images here).
Source V. Hartikainen
Prismatic Floral Background No Black
Source GDJ
Prismatic Groovy Concentric Background 2 No Black
Source GDJ
A new one called white wall, not by me this time.
Source Yuji Honzawa
A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
A heavy hitter at 400x400px, but lovely still.
Source Breezi
Original seamless pattern with an Inkscape filter.
Source Firkin
Vector version of a JPG that was uploaded to Pixabay by theasad121
Source Firkin
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin