This reminds me of Game Cube. A nice light 3D cube pattern.
Source Sander Ottens
Prismatic Hypnotic Pattern No Background
Source GDJ
The classic notebook paper with horizontal stripes.
Source Are Sundnes
Same as gray sand but lighter. A sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
Real snow that tiles, not easy. This is not perfect, but an attempt.
Source Atle Mo
If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
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
A light gray fabric pattern with faded vertical stripes.
Source V. Hartikainen
A dark gray, sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
Prismatic Rounded Squares Grid 4 No Background
Source GDJ
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
An alternative colour scheme for the original background.
Source Firkin
Geometric triangles seem to be quite hot these days.
Source Pixeden
Luxury pattern, looking like it came right out of Paris.
Source Daniel Beaton
A seamless pattern the starting point for which was a 'light rays' rendering in Paint.net.
Source Firkin