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 seamless pattern based on a tile that can be achieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Background Wall, Art Abstract, Blue Well & CC0 texture.
Source Ractapopulous
From a design found in 'History of the Virginia Company of London; with letters to and from the first Colony, never before printed', Edward Neill, 1869.
Source Firkin
Prismatic Snowflakes Pattern 2 No Background
Source GDJ
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
You may use it as is, or modify it as you like.
Source V. Hartikainen
A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
A seamless background tile of aged paper with shabby look.
Source V. Hartikainen
A background tile of dark textile. Made this a long time ago and just now decided to publish it.
Source V. Hartikainen
A simple but elegant classic. Every collection needs one of these.
Source Christopher Burton
The perfect pattern for all your blogs about type, or type-related matters.
Source Atle Mo
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
Tiny little fibers making a soft and sweet look.
Source Badhon Ebrahim
Luxurious looking pattern (for a T-shirt maybe?) with a hint of green.
Source Simon Meek
Prismatic Groovy Concentric Background 4 No Black
Source GDJ
Prismatic Geometric Pattern Background
Source GDJ
Run a restaurant blog? Here you go. Done.
Source Andrijana Jarnjak
A simple but elegant classic. Every collection needs one of these.
Source Christopher Burton
That’s what it is, a dark dot. Or sort of carbon looking.
Source Tsvetelin Nikolov
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin