From a drawing in 'Hyde Park from Domesday-Book to date', John Ashton, 1896.
Source Firkin
Prismatic Abstract Line Art Pattern Background 2
Source GDJ
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
A lot of people like the icon patterns, so here’s one for your restaurant blog.
Source Andrijana Jarnjak
If you need a green background for your blog/website, try this one. Remember that Green Striped Background is seamlessly tileable.
Source V. Hartikainen
This is the remix of an OCAL clipart called "Rain on Window" uploaded by "pagarmidna".Thanks.This is a seamless pattern of raindrops.
Source Yamachem
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
Prismatic Hypnotic Pattern No Background
Source GDJ
A slightly more textured pattern, medium gray. A bit like a potato sack?
Source Bilal Ketab
Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
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
Tiny, tiny 3D cubes. Reminds me of the good old pattern from k10k.
Source Etienne Rallion
A free tileable background colored in off-white (antique white) color.
Source V. Hartikainen
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
From a drawing in 'Uit de geschiedenis der Heilige Stede te Amsterdam', Yohannes Sterck, 1898.
Source Firkin
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
From a drawing in 'Storia del Palazzo Vecchio in Firenze', Aurelio Gotti, 1889.
Source Firkin