I took the liberty of using Dmitry’s pattern and made a version without perforation.
Source Atle Mo
This is a remix of "blue wave-seigaiha".I hope this subtle color version of Seigaiha would be suitable for background .
Source Yamachem
If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
You know you can’t get enough of these linen-fabric-y patterns.
Source James Basoo
Carbon fiber is never out of fashion, so here is one more style for you.
Source Alfred Lee
The perfect pattern for all your blogs about type, or type-related matters.
Source Atle Mo
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
This one is rather fun and playful. The 2X could be used at 1X too!
Source Welsley
This is indeed a bit strange, but here’s to the crazy ones!
Source Christopher Buecheler
Prismatic Groovy Concentric Background 2 No Black
Source GDJ
The basic shapes never get old. Simple triangle pattern.
Source Atle Mo
A seamless background of warped stripes on paper.
Source V. Hartikainen
U.S.-based National Fire Protection Association standard fire diamond for flagging risks posed by hazardous materials. The red diamond has a number 0-4 depending on flammability. The blue diamond has a number 0-4 depending on health hazard. The yellow has a number 0-4 depending on reactivity. the white square has a special notice, e.g OX for oxidizer.
Source Firkin
Could remind you a bit of those squares in Super Mario Bros, yeh?
Source Jeff Wall
Actually, there's no clouds in it, but I think it looks quite nice.
Source V. Hartikainen
Prismatic Abstract Geometric Background 5
Source GDJ
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A white version of the very popular linen pattern.
Source Ant Ekşiler
A large pattern with funky shapes and form. An original. Sort of origami-ish.
Source Luuk van Baars
Semi-light fabric pattern made out of random pixels in shades of gray.
Source Atle Mo