Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Seamless Prismatic Quadrilateral Line Art Pattern No Background
Source GDJ
A free pink background pattern.
Source V. Hartikainen
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
A dark gray, sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Prismatic Groovy Concentric Background
Source GDJ
The file was named striped lens, but hey – Translucent Fibres works too.
Source Angelica
Remixed from an image that was uploaded to Pixabay by KirstenStar
Source Firkin
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
From a drawing in 'Storia del Palazzo Vecchio in Firenze', Aurelio Gotti, 1889.
Source Firkin
Thin lines, noise and texture creates this crisp dark denim pattern.
Source Marco Slooten
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
The Grid. A digital frontier. I tried to picture clusters of information as they traveled through the computer.
Source Haris Šumić
The starting point for this was drawn on the web site steamcoded.org/PolyskelionMaker.svg
Source Firkin
Black paper texture, based on two different images.
Source Atle Mo
Based from Design Kindle
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Seamless Background For Websites. It has a texture similar to cork-board.
Source V. Hartikainen