A cute x, if you need that sort of thing.
Source Juan Scrocchi
Awesome name, great pattern. Who does not love space?
Source Nick Batchelor
Uses spirals from Pixabay. To get the basic tile select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Paper model of a tetrahedron. Modelo de papel de um tetraedro.
Source laobc
Remixed from a raster on Pixabay that was uploaded by ArtsyBee.
Source Firkin
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Prismatic Abstract Geometric Background 4 No Black
Source GDJ
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
A seamless pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
I’m starting to think I have a concrete wall fetish.
Source Atle Mo
A brown seamless wood texture in a form of stripe pattern. The result has turned out pretty well, in my opinion.
Source V. Hartikainen
Floral patterns will never go out of style, so enjoy this one.
Source Lasma
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Cubes as far as your eyes can see. You know, because they tile.
Source Jan Meeus
Might not be super subtle, but quite original in its form.
Source Alex Smith
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Derived from a PNG that was uploaded to Pixabay by nutkitten
Source Firkin
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
Prismatic Isometric Cube Wireframe Pattern No Background
Source GDJ
From an image on opengameart.org shared by rubberduck.
Source Firkin
A seamless pattern formed from cross 4. To get the original tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Prismatic Groovy Concentric Background 3
Source GDJ