Hexagonal dark 3D pattern. What more can you ask for?
Source Norbert Levajsics
Pattern Background, Texture, Photoshop Structure style CC0 texture.
Source Darkmoon1968
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
This is indeed a bit strange, but here’s to the crazy ones!
Source Christopher Buecheler
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Dark, square, clean and tidy. What more can you ask for?
Source Jaromír Kavan
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
An alternative colour scheme to the original seamless pattern.
Source Firkin
Otis Ray Redding was an American soul singer-songwriter, record producer, arranger, and talent scout. So you know.
Source Thomas Myrman
Paper model of a tetrahedron. Modelo de papel de um tetraedro.
Source laobc
Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8
Prismatic Polka Dots 3 No Background
Source GDJ