Not the Rebel alliance, but a dark textured pattern.
Source Hendrik Lammers
The name alone is awesome, but so is this sweet dark pattern.
Source Federica Pelzel
Some more diagonal lines and noise, because you know you want it.
Source Atle Mo
A free web background image with a seamless concrete-like texture and an Indian-red color.
Source V. Hartikainen
Prismatic Geometric Pattern Background No Black
Source GDJ
Prismatic Abstract Line Art Pattern Background
Source GDJ
A seamless pattern the starting point for which was a 'light rays' rendering in Paint.net.
Source Firkin
One more sharp little tile for you. Subtle circles this time.
Source Blunia
Scanned some rice paper and tiled it up for you. Enjoy.
Source Atle Mo
A simple circle. That’s all it takes. This one is even transparent, for those who like that.
Source Saqib
Greyscale version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Nice little grid. Would work great as a base on top of some other patterns.
Source Arno Gregorian
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
The original enhanced with some gradients.
Source Firkin
A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
Number 3 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
Not strictly seamless in that opposite edges are not identical. But they do marry up to make an interesting pattern
Source Firkin