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 comeback for you: the popular Escheresque, now in black.
Source Patten
This ons is quite old school looking. Retro, even. I like it.
Source Arno Declercq
After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers
You know, tiny and sharp. I’m sure you’ll find a use for it.
Source Atle Mo
Prismatic Groovy Concentric Background 2 No Black
Source GDJ
Tiny circle waves, almost like the ocean.
Source Sagive
Abstract Stars Geometric Pattern Prismatic No Background
Source GDJ
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
It’s okay to be square! A nice light gray pattern with random squares.
Source Waseem Dahman
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Fake or not, it’s quite luxurious.
Source Factorio.us Collective
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
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
To celebrate the new feature, we need some sparkling diamonds.
Source Atle Mo
From a drawing in 'A Life Interest', Mrs Alexander, 1888.
Source Firkin
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
From a drawing in 'Navigations de Alouys de Cademoste.-La Navigation du Capitaine Pierre Sintre', Alvise da ca da Mosto, 1895.
Source Firkin
Here's a dark background pattern that contains a steel grid pattern as a texture. Use it as a website background or for other purposes. It's free!
Source V. Hartikainen
Luxury pattern, looking like it came right out of Paris.
Source Daniel Beaton
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