It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
Nasty or not, it’s a nice pattern that tiles. Like they all do.
Source Badhon Ebrahim
Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Heavily remixed from a drawing in 'Barbara Leybourne; a story of eighty years ago', Sarah Hamer, 1889.
Source Firkin
Colourful background achieved with gradient fills.
Source Firkin
This texture looks like old leather. It should look great as a background on web pages.
Source V. Hartikainen
A subtle shadowed checkered pattern. Increase the lightness for even more subtle sexiness.
Source Josh Green
If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
Paper model of a tetrahedron. Modelo de papel de um tetraedro.
Source laobc
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A slightly more textured pattern, medium gray. A bit like a potato sack?
Source Bilal Ketab
Number 1 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
A pattern drawn in Paint.net and vectorized in Inkscape.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Derived from an image that was uploaded to Pixabay by Darkmoon1968
Source Firkin
Prismatic Abstract Geometric Background 4
Source GDJ
An alternative colour scheme to the original seamless pattern.
Source Firkin
A seamless pattern of leopard skin. It should look nice as a background element on web pages.
Source V. Hartikainen
Prismatic Geometric Tessellation Pattern 3 No Background
Source GDJ
A seamless pattern based on a tile that can be achieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
If you don’t like cream and pixels, you’re in the wrong place.
Source Mizanur Rahman
A series of 5 patterns. That’s what the P stands for, if you didn’t guess it.
Source Dima Shiper
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
Prismatic Groovy Concentric Background 2
Source GDJ