A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Remixed from an image on Pixabay uploaded by Prawny
Source Firkin
I asked Gjermund if he could make a pattern for us – result!
Source Gjermund Gustavsen
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
Subtle scratches on a light gray background.
Source Andrey Ovcharov
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
From a drawing in 'Cowdray: the history of a great English House', Julia Roundell, 1884.
Source Firkin
Nasty or not, it’s a nice pattern that tiles. Like they all do.
Source Badhon Ebrahim
Psychedelic Geometric Background No Black
Source GDJ
Prismatic Geometric Pattern Background No Black
Source GDJ
A simple example on using clones. You can generate a nice base for a pattern fill quickly with it.
Source Lazur URH
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
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
Prepared mostly as a raster in Paint.net and vectorised.
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Paper model of a tetrahedron. Modelo de papel de um tetraedro.
Source laobc
Small dots with minor circles spread across to form a nice mosaic.
Source John Burks
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
One more updated pattern. Not really carbon fiber, but it’s the most popular pattern, so I’ll give you an extra choice.
Source Atle Mo
A background tile for web with abstract repeating texture of dark "stone wall".
Source V. Hartikainen
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
This ons is quite old school looking. Retro, even. I like it.
Source Arno Declercq
Zero CC tileable wood texture, made by me procedurally in Neo Texture Edit.
Source Sojan Janso
A free seamless background texture that looks like a brown stone wall.
Source V. Hartikainen