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
A seamless web texture of "green stone".
Source V. Hartikainen
Crossing lines with a subtle emboss effect on a dark background.
Source Stefan Aleksić
A seamless pattern based on a rectangular tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Derived from an image that was uploaded to Pixabay by mdmelo.
Source Firkin
Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
A repeating background of thick textured paper. Actually, it turned out to look like something between a paper and fabric.
Source V. Hartikainen
The image is a design of blue glass.How about using it as background image?
Source Yamachem
A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
Nothing like a clean set of bed sheets, huh?
Source Badhon Ebrahim
This background pattern looks like bamboo to me. Feel free to download it for your website (for your blog perhaps?).
Source V. Hartikainen
A large pattern with funky shapes and form. An original. Sort of origami-ish.
Source Luuk van Baars
This was formed by distorting an image of a background on Pixabay.
Source Firkin
A simple but elegant classic. Every collection needs one of these.
Source Christopher Burton
Formed by distorting a JPG from PublicDomainPictures
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Not strictly seamless in that opposite edges are not identical. But they do marry up to make an interesting pattern
Source Firkin
Prismatic Groovy Concentric Background 4 No Black
Source GDJ
This texture looks like old leather. It should look great as a background on web pages.
Source V. Hartikainen
Prismatic Abstract Geometric Background 2
Source GDJ
Feel free to download and use it, or see the rest of the dark background patterns that I have made. Anyway, I hope you will find something that you like.
Source V. Hartikainen
The starting point for this was a texture drawn with the 'Radial Colors' plug-in in Paint.net.
Source Firkin
Dark, lines, noise, tactile. You get the drift.
Source Anatoli Nicolae
Here's a camo print with more tan and less green, such as might be used in a desert scenario. This is tileable, so it can be used as a wallpaper or background.
Source Eady
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
A brown seamless wood texture in a form of stripe pattern. The result has turned out pretty well, in my opinion.
Source V. Hartikainen
An emulated “transparent” background pattern, like that of all kinds of computer graphics software.
Source AdamStanislav
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin