Derived from a JPG that was uploaded to Pixabay by ractapopulous
Source Firkin
Derived from an image that was uploaded to Pixabay by starchim01
Source Firkin
A seamless tessellation pattern. To get the tile this is formed from, select the pattern in Inkscape and use shift+alt+i.
Source Firkin
Prismatic Abstract Background Design
Source GDJ
Not the Rebel alliance, but a dark textured pattern.
Source Hendrik Lammers
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
Derived from a PNG that was uploaded to Pixabay by nutkitten
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Prismatic Curved Diamond Pattern No Background
Source GDJ
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
No idea what Nistri means, but it’s a crisp little pattern nonetheless.
Source Markus Reiter
A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
Colour version of the original pattern.
Source Firkin
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
Neat little photography icon pattern.
Source Hossam Elbialy
A dark background pattern/texture of a dimpled metal plate.
Source V. Hartikainen
A free seamless background pattern for use on websites.
Source V. Hartikainen
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
By popular request, an outline version of the pentagon pattern.
Source Atle Mo
A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki
"Beige Stone", Tileable Texture.
Source V. Hartikainen
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin