Actually, there's no clouds in it, but I think it looks quite nice.
Source V. Hartikainen
An attempt for cleaning up the original image in a few steps.
Source Lazur URH
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
From a drawing in 'Hundert Jahre in Wort und Bild', S. Stefan, 1899.
Source Firkin
Greyscale version of a pattern that came out of playing with the 'slinky' plug-in for Paint.net
Source Firkin
This is a remix of "blue wave-seigaiha".I hope this subtle color version of Seigaiha would be suitable for background .
Source Yamachem
Prismatic Abstract Geometric Background 4
Source GDJ
The Grid. A digital frontier. I tried to picture clusters of information as they traveled through the computer.
Source Haris Šumić
No, not the band but the pattern. Simple squares in gray tones, of course.
Source Atle Mo
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
From a drawing in 'From Snowdon to the Sea. Striking stories of North and South Wales', Marie Trevelyan, 1895.
Source Firkin
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
Bumps, highlight and shadows – all good things.
Source Badhon Ebrahim
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
Seamless tile drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Sounds like something from World of Warcraft. Has to be good.
Source Tony Kinard
Zero CC plastic pattern texture, photographed and made by me. CC0 *Note, this texture was on the perfectly smooth surface of a plastic shovel scraper, not sure how to call it. Plz coment if you know what its called.
Source Sojan Janso
This background image is great for using in web design or graphic design projects. And don't forget to visit the homepage. I frequently update this resource with fresh tileable backgrounds.
Source V. Hartikainen
Washi (和紙?) is a type of paper made in Japan. Here’s the pattern for you!
Source Carolynne
White circles connecting on a light gray background.
Source Mark Collins