Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
Farmer could be some sort of fabric pattern, with a hint of green.
Source Fabian Schultz
Light gray paper pattern with small traces of fiber and some dust.
Source Atle Mo
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
No, not the band but the pattern. Simple squares in gray tones, of course.
Source Atle Mo
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
An alternative colour scheme to the original seamless pattern.
Source Firkin
Seamless Light Background Texture.
Source V. Hartikainen
It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns
A seamless green background texture. The image is distributed under a Creative Commons License (like all of the images here).
Source V. Hartikainen
A bit strange this one, but nice at the same time.
Source Diogo Silva
Inspired by this, I came up with this pattern. Madness!
Source Atle Mo
This one is rather fun and playful. The 2X could be used at 1X too!
Source Welsley
Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
Same as the black version, but now in shades of gray. Very subtle and fine grained.
Source Atle Mo
The image depicts a seamless pattern of a Japanese family crest called "chidori" in Japanese .A chidori in Japanese means a plover in English.
Source Yamachem
Could be paper, could be a Polaroid frame – up to you!
Source Chaos
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
From a drawing in 'Bond Slaves. The story of a struggle.', Isabella Varley, 1893.
Source Firkin
Formed by distorting the inside front cover of 'Diversæ insectarum volatilium : icones ad vivum accuratissmè depictæ per celeberrimum pictorem', Jacob Hoefnagel, 1630.
Source Firkin
"Beige Stone", Tileable Texture.
Source V. Hartikainen
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry
I took the liberty of using Dmitry’s pattern and made a version without perforation.
Source Atle Mo