Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
You guessed it – looks a bit like cloth.
Source Peax Webdesign
A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
Carbon fiber is never out of fashion, so here is one more style for you.
Source Alfred Lee
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Produced using the clouds, flames and glass blocks plug-ins in Paint.net and the resulting .PNG vectorised with Vector Magic.
Source Firkin
Zero CC tileable hard cover cells, skin like, book texture. 4K, Scanned and made by me CC0
Source Sojan Janso
Paper model of a tetrahedron. Modelo de papel de um tetraedro.
Source laobc
Remixed from a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Not a flat you live inside, like in the UK – but a flat piece of cardboard.
Source Appleshadow
It’s like Shine Dotted’s sister, only rotated 45 degrees.
Source mediumidee
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin