Derived from a corner decoration itself found as a jpg on Pixabay.
Source Firkin
The name is totally random, but hey, it sounds good.
Source Atle Mo
Prismatic Geometric Tessellation Pattern 3 No Background
Source GDJ
Derived from a drawing in 'The Murmur of the Shells', Samuel Cowen, 1879.
Source Firkin
Almost like little fish shells, or dragon skin.
Source Graphiste
Dark blue concrete wall with some small dust spots.
Source Atle Mo
A seamless background tile of aged paper with shabby look.
Source V. Hartikainen
Just like the black maze, only in light gray. Duh.
Source Peax
Zero CC tileable hard cover cells book texture, 4k, scanned and made by me. CC0
Source Sojan Janso
A seamless pattern drawn originally in Paint.net by distorting a slice of background pattern 116 and copying the resulting triangle numerous times.
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Washi (和紙?) is a type of paper made in Japan. Here’s the pattern for you!
Source Carolynne
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
A green background pattern with warped vertical stripes and a grunge look.
Source V. Hartikainen
A slightly more textured pattern, medium gray. A bit like a potato sack?
Source Bilal Ketab
It’s an egg, in the form of a pattern. This really is 2012.
Source Paul Phönixweiß
Might not be super subtle, but quite original in its form.
Source Alex Smith
Classy golf-pants pattern, or crossed stripes if you will.
Source Will Monson
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
A series of 5 patterns. That’s what the P stands for, if you didn’t guess it.
Source Dima Shiper