From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
Dark blue concrete wall with some small dust spots.
Source Atle Mo
Nothing like a clean set of bed sheets, huh?
Source Badhon Ebrahim
You know you love wood patterns, so here’s one more.
Source Richard Tabor
Seamless pattern the basic tile for which can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
As the original image 's page size is too large for its image size, I remixed it.
Source Yamachem
Remixed from a PNG that was uploaded to Pixabay by gingertea
Source Firkin
One more updated pattern. Not really carbon fiber, but it’s the most popular pattern, so I’ll give you an extra choice.
Source Atle Mo
Prismatic Groovy Concentric Background 5 No Black
Source GDJ
A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.
Source V. Hartikainen
CC0 remixed from a drawing. Walter Crane, 1914, Firkin.
Source SliverKnight
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
The image depicts a seamless pattern made using a bird's face.
Source Yamachem
Prismatic Abstract Geometric Background 5 No Black
Source GDJ
Zero CC tileable pine bark texture, photographed and made by me. CC0
Source Sojan Janso
A subtle shadowed checkered pattern. Increase the lightness for even more subtle sexiness.
Source Josh Green
A simple circle. That’s all it takes. This one is even transparent, for those who like that.
Source Saqib
This metal background pattern resembles a metal plate with rivets. Solid rivets on a metal plate.
Source V. Hartikainen
Floral patterns might not be the hottest thing right now, but you never know when you need it!
Source Lauren
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
A bit of scratched up grayness. Always good.
Source Josh Green
Semi-light fabric pattern made out of random pixels in shades of gray.
Source Atle Mo