Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
You know, tiny and sharp. I’m sure you’ll find a use for it.
Source Atle Mo
Not a flat you live inside, like in the UK – but a flat piece of cardboard.
Source Appleshadow
Zero CC tileable bark texture, photographed and made by me. CC0
Source Sojan Janso
Dark, crisp and subtle. Tiny black lines on top of some noise.
Source Wilmotte Bastien
Imagine you zoomed in 1000X on some fabric. But then it turned out to be a skeleton!
Source Angelica
The basic shapes never get old. Simple triangle pattern.
Source Atle Mo
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
Prismatic Polyskelion Pattern No Background
Source GDJ
Small dots with minor circles spread across to form a nice mosaic.
Source John Burks
A textured blue background pattern with vertical stripes.
Source V. Hartikainen
Prismatic Geometric Pattern Background
Source GDJ
From a drawing in 'Danmarks Riges Historie af J. Steenstrup, Kr. Erslev, A. Heise, V. Mollerup, J. A. Fridericia, E. Holm, A. D. Jørgensen', 1897.
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
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
This is so subtle I hope you can see it! Tweak at will.
Source Alexandre Naud
From a drawing in 'Storia del Palazzo Vecchio in Firenze', Aurelio Gotti, 1889.
Source Firkin
A pale olive green background with a seamless texture.
Source V. Hartikainen
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
Washi (和紙?) is a type of paper made in Japan. Here’s the pattern for you!
Source Carolynne
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
This is so subtle I hope you can see it! Tweak at will.
Source Alexandre Naud
A seamless background texture of old cardboard.
Source V. Hartikainen