A seamless pattern the starting point for which was a 'light rays' rendering in Paint.net.
Source Firkin
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
The image depicts a seamless pattern of a fishnet with a plenty of fish.It may be a lucky charm for fishermen.
Source Yamachem
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Greyscale version of a pattern that came out of playing with the 'slinky' plug-in for Paint.net
Source Firkin
Bright gray tones with a hint of some metal surface.
Source Hendrik Lammers
Green Background Pattern
Source V. Hartikainen
An abstract texture of black metal pipes (seamless).
Source V. Hartikainen
A seamless texture of a rough concrete surface.
Source V. Hartikainen
Background formed from the iconic plastic construction bricks that gave me endless hours of fun when I was a lad.
Source Firkin
Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
With a name like this, it has to be hot. Diagonal lines in light shades.
Source Isaac
Prismatic Polka Dots Mark II 3 No Background
Source GDJ
This is a grid, only it’s noisy. You know. Reminds you of those printed grids you draw on.
Source Vectorpile
A textured blue background pattern with vertical stripes.
Source V. Hartikainen
From a drawing in 'Az Osztrák-Magyar Monarchia irásban és képben', 1885.
Source Firkin
Remixed from a drawing that was uploaded to Pixabay by DavidZydd
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Nicely executed tiling for an interesting pattern.
Source Ignasi Àvila Padró
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
You may use it as is, or modify it as you like.
Source V. Hartikainen
Dark and hard, just the way we like it. Embossed triangles makes a nice pattern.
Source Ivan Ginev
A seamless background texture of old cardboard.
Source V. Hartikainen