A set of paper filters. The base texture is generated the same way, only the compositing mode is varied.
Source Lazur URH
A comeback for you: the popular Escheresque, now in black.
Source Patten
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
This one is amazing, truly original. Go use it!
Source Viahorizon
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Lovely pattern with some good-looking non-random noise lines.
Source Zucx
Prismatic Groovy Concentric Background
Source GDJ
Prismatic Abstract Background Design
Source GDJ
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf
Fabric-ish patterns are close to my heart. French Stucco to the rescue.
Source Christopher Buecheler
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Black And White Floral Pattern Background from PDP.
Source GDJ
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
More leather, and this time it’s bigger! You know, in case you need that.
Source Elemis
The image a seamless pattern of a wire-mesh fence.I want you to use this pattern as a lower layer.
Source Yamachem
This is a remix of "blue wave-seigaiha".I hope this subtle color version of Seigaiha would be suitable for background .
Source Yamachem
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
A very dark asfalt pattern based off of a photo taken with my iPhone.
Source Atle Mo
After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin