New paper pattern with a slightly organic feel to it, using some thin threads.
Source Atle Mo
Just what the name says, paper fibers. Always good to have.
Source Heliodor jalba
Background formed from the iconic plastic construction bricks that gave me endless hours of fun when I was a lad.
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
This background pattern contains a seamless texture of bark. It's not very realistic, but I think it looks quite nice.
Source V. Hartikainen
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Derived from a JPG that was uploaded to Pixabay by ractapopulous
Source Firkin
Zero CC tileable seed texture, edited by me to be seamless from a Pixabay image. CC0
Source Sojan Janso
A seamless pattern created from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Imagine you zoomed in 1000X on some fabric. But then it turned out to be a skeleton!
Source Angelica
Not sure if this is related to the Nami you get in Google image search, but hey, it’s nice!
Source Dertig Media
A slightly more textured pattern, medium gray. A bit like a potato sack?
Source Bilal Ketab
A seamless background of warped stripes on paper.
Source V. Hartikainen
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