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
The starting point for this was a texture drawn with the 'Radial Colors' plug-in in Paint.net.
Source Firkin
A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Could remind you a bit of those squares in Super Mario Bros, yeh?
Source Jeff Wall
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
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Sounds like something from World of Warcraft. Has to be good.
Source Tony Kinard
Same classic 45-degree pattern, dark version.
Source Luke McDonald
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
A very dark spotted twinkle pattern for your twinkle needs.
Source Badhon Ebrahim
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
This one could be the shirt of a golf player. Angled lines in different thicknesses.
Source Olivier Pineda
All good things come in threes, so I give you the third in my little concrete wall series.
Source Atle Mo
An attempt for cleaning up the original image in a few steps.
Source Lazur URH
I love the movie Pineapple Express, and I’m also liking this Pineapple right here.
Source Audee Mirza
The base gradient edited so now more details are rendered.
Source Lazur URH
From an image on opengameart.org shared by rubberduck.
Source Firkin