Sharp pixel pattern looking like some sort of fabric.
Source Dmitry
Almost like little fish shells, or dragon skin.
Source Graphiste
Zero CC tileable hard cover cells book texture, 4k, scanned and made by me. CC0
Source Sojan Janso
From a drawing in 'Less Black than we're painted', James Payn, 1884.
Source Firkin
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
This pack of filters can help you adding a blocky overlay to objects. May come handy at drawing blocks of stone.
Source Lazur URH
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
Honestly, who does not like a little pipe and mustache?
Source Luca Errico
Used the 6th circle pattern designed by Viscious-Speed to create a print that can be used for card making or scrapbooking. Save as a PDF file for the best printing option.
Source Lovinglf
Prismatic Abstract Background Design
Source GDJ
Same as Silver Scales, but in black. Turn your site into a dragon with this great scale pattern.
Source Alex Parker
ZeroCC tileable stone texture, edited from pixabay. CC0
Source Sojan Janso
It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns
This is so subtle: We’re talking 1% opacity. Get your squint on!
Source Atle Mo
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
Geometric triangles seem to be quite hot these days.
Source Pixeden
Light gray pattern with an almost wall tile-like appearance.
Source Markus Tinner
The first pattern on here using opacity. Try it on a site with a colored background, or even using mixed colors.
Source Nathan Spady
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Prismatic Triangular Background Design Mark II 5
Source GDJ
A seamless background of warped stripes on paper.
Source V. Hartikainen
Psychedelic Geometric Background No Black
Source GDJ
Seamless pattern the basic tile for which can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
From a design found in 'History of the Virginia Company of London; with letters to and from the first Colony, never before printed', Edward Neill, 1869.
Source Firkin