Super detailed 16×16 tile that forms a beautiful pattern of straws.
Source Pavel
Prismatic Curved Diamond Pattern 5 No Background
Source GDJ
Remixed from a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892. The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers
Remixed from a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
A seamless background of warped stripes on paper.
Source V. Hartikainen
Prismatic Curved Diamond Pattern 8 No Background
Source GDJ
A comeback for you: the popular Escheresque, now in black.
Source Patten
ZeroCC tileable mossy (lichen) stone texture, edited from pixabay. CC0
Source Sojan Janso
Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
Remixed from a drawing in 'Jezebel's Daughter', Wilkie Collins 1880
Source Firkin
A subtle shadowed checkered pattern. Increase the lightness for even more subtle sexiness.
Source Josh Green
There are quite a few grid patterns, but this one is a super tiny grid with some dust for good measure.
Source Dominik Kiss
Actually remixed from a pattern on Pixabay. But then noticed a very similar one on Openclipart.org uploaded by btj51q2.
Source Firkin
A new take on the black linen pattern. Softer this time.
Source Atle Mo
The classic 45-degree diagonal line pattern, done right.
Source Jorick van Hees
The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
This is so subtle I hope you can see it! Tweak at will.
Source Alexandre Naud