The act or state of corrugating or of being corrugated, a wrinkle; fold; furrow; ridge.
Source Anna Litvinuk
The original enhanced with one of Inkscapes's filters.
Source Firkin
A seamless pattern from a tile made from a jpg on Pixabay. To get the tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A seamless pattern recreated from an image on Pixabay. It is reminiscent of parquet flooring and is formed from a square tile, which can be recovered in Inkscape by selecting the ungrouped rectangle and using shift-alt-I together.
Source Firkin
Paper model of a tetrahedron. Modelo de papel de um tetraedro.
Source laobc
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
From a drawing in 'Heroes of North African Discovery', Nancy Meugens, 1894.
Source Firkin
A background formed from an image of an old tile on the New York Metropolitan Museum of Art website. To get the base tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Background Wall, Art Abstract, Watercolor Vintage style CC0 texture.
Source Ractapopulous
Derived from a JPG that was uploaded to Pixabay by ractapopulous
Source Firkin
Dark, crisp and subtle. Tiny black lines on top of some noise.
Source Wilmotte Bastien
Another fairly simple design drawn in Paint.net and vectorized in Inkscape.
Source Firkin
Fix and cc0 to get the tile this is based on.
Source SliverKnight
Prismatic Polka Dots Mark II No Background
Source GDJ
Sort of like the Photoshop transparent background, but better!
Source Alex Parker
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A free seamless background texture of "timber wall" (colored in dark brown).
Source V. Hartikainen
Fake or not, it’s quite luxurious.
Source Factorio.us Collective
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
If you’re sick of the fancy 3D, grunge and noisy patterns, take a look at this flat 2D brick wall.
Source Listvetra
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin