Might not be super subtle, but quite original in its form.
Source Alex Smith
Inspired by the B&O Play, I had to make this pattern.
Source Atle Mo
A repeating background of beige (or is it more vanilla yellow) textured stripes. One more background with stripes.
Source V. Hartikainen
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
No idea what Nistri means, but it’s a crisp little pattern nonetheless.
Source Markus Reiter
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry
An emulated “transparent” background pattern, like that of all kinds of computer graphics software.
Source AdamStanislav
A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.
Source Firkin
Colorful Floral Background No Black
Source GDJ
The Grid. A digital frontier. I tried to picture clusters of information as they traveled through the computer.
Source Haris Šumić