Not the Rebel alliance, but a dark textured pattern.
Source Hendrik Lammers
Prismatic Geometric Tessellation Pattern 2 No Background
Source GDJ
More in the paper realm, this time with fibers.
Source Jorge Fuentes
The image is a seamless pattern of a fishnet.
Source Yamachem
This background image has seamless texture that resembles a surface of gray stone.
Source V. Hartikainen
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i
Source Firkin
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
I took the liberty of using Dmitry’s pattern and made a version without perforation.
Source Atle Mo
Tiny, tiny 3D cubes. Reminds me of the good old pattern from k10k.
Source Etienne Rallion
Same as gray sand but lighter. A sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
On a large canvas you can see it tiling, but used on smaller areas, it’s beautiful.
Source Paul Phönixweiß
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Abstract Tiled Background Extended 10
Source GDJ
Sort of like the Photoshop transparent background, but better!
Source Alex Parker
One can never have too few rice paper patterns, so here is one more.
Source Atle Mo
Zero CC tileable brick texture, photographed and made by me. CC0
Source Sojan Janso
I scanned a paper coffee cup. You know, in case you need it.
Source Atle Mo
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Nice and simple crossed lines in dark gray tones.
Source Stefan Aleksić
From a drawing in 'La Principauté de Liège et les Pays-Bas au XVIe siècle', Société des Bibliophiles Liégeois ,1887.
Source Firkin