There are many carbon patterns, but this one is tiny.
Source Designova
Some dark 45 degree angles creating a nice pattern. Huge.
Source Dark Sharp Edges
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
The edges of all the red objects line up either vertically or horizontally, but it doesn't appear so. Made from a square tile that can be got by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Prismatic Abstract Line Art Pattern Background
Source GDJ
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
One more in the line of patterns inspired by Japanese/Asian styles. Smooth.
Source Kim Ruddock
Utilising a bird from s-light and some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A free light orange brown wallpaper with vertical stripes designed for use as a tiled background on websites. An yet another background pattern with vertical stripes.
Source V. Hartikainen
Thin lines, noise and texture creates this crisp dark denim pattern.
Source Marco Slooten
Hexagonal dark 3D pattern. What more can you ask for?
Source Norbert Levajsics
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
Formed by distorting an image on Pixabay that was uploaded by gustavorezende. To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Here's an yet another seamless note paper texture for use as a background on websites.
Source V. Hartikainen
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
The act or state of corrugating or of being corrugated, a wrinkle; fold; furrow; ridge.
Source Anna Litvinuk
I guess this is inspired by the city of Ravenna in Italy and its stone walls.
Source Sentel
Turn your site into a dragon with this great scale pattern.
Source Alex Parker
There are many carbon patterns, but this one is tiny.
Source Designova
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous