A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Scanned some rice paper and tiled it up for you. Enjoy.
Source Atle Mo
A background pattern with wavy green vertical stripes. This one has green stripes on a white background. Download if you like it.
Source V. Hartikainen
Prismatic Groovy Concentric Background 5 No Black
Source GDJ
A pattern drawn in Paint.net and vectorized in Vector Magic.
Source Firkin
Prismatic Hypnotic Pattern No Background
Source GDJ
The image depicts the Japanese Edo pattern called "seigaiha" or "青海波" meaning "blue -sea- wave".I hope it's suitable for the summer season.
Source Yamachem
A version without colours blended together to give a different look.
Source Firkin
Prismatic Curved Diamond Pattern 7 No Background
Source GDJ
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Remixed from a drawing in 'Works. Popular edition', John Ruskin, 1886.
Source Firkin
From a drawing in 'Hundert Jahre in Wort und Bild', S. Stefan, 1899.
Source Firkin
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
f you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
This pack of filters can help you adding a blocky overlay to objects. May come handy at drawing blocks of stone.
Source Lazur URH
To celebrate the new feature, we need some sparkling diamonds.
Source Atle Mo
Remixed from a JPG that was uploaded to Pixabay by theasad121
Source Firkin
A free green background pattern with a pattern of rhombuses on a seamless texture. Feel free to use it as a tiled background image on your web site.
Source V. Hartikainen
A comeback for you: the popular Escheresque, now in black.
Source Patten
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
I asked Gjermund if he could make a pattern for us – result!
Source Gjermund Gustavsen