The act or state of corrugating or of being corrugated, a wrinkle; fold; furrow; ridge.
Source Anna Litvinuk
Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ
The image depicts a seamless pattern made using a bird's face.
Source Yamachem
The image is a seamless pattern of a fishnet.
Source Yamachem
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
To celebrate the new feature, we need some sparkling diamonds.
Source Atle Mo
Prismatic Abstract Background Design No Black
Source GDJ
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
This background image has seamless texture that resembles a surface of gray stone.
Source V. Hartikainen
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
As the original image 's page size is too large for its image size, I remixed it.
Source Yamachem
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
A heavy dark gray base, some subtle noise and a 45-degree grid makes this look like a pattern with a tactile feel to it.
Source Atle Mo
A slightly grainy paper pattern with small horizontal and vertical strokes.
Source Atle Mo
We have some linen patterns here, but none that are stressed. Until now.
Source Jordan Pittman
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
Prismatic Abstract Geometric Background 4 No Black
Source GDJ
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
A comeback for you: the popular Escheresque, now in black.
Source Patten