Scanned some rice paper and tiled it up for you. Enjoy.
Source Atle Mo
A seamless texture of an abstract wall colored in shades of light orange brown.
Source V. Hartikainen
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857. The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Abstract Tiled Background Extended 6
Source GDJ
A floral background formed from numerous clones of flower 117.
Source Firkin
Free tiled background with colorful stripes and white splatter.
Source V. Hartikainen
A pale yellow background pattern with vertical stripes. The stripes are partially faded. I think this background image turned out pretty well, especially those faded stripes.
Source V. Hartikainen
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
Element of beach pattern with background.
Source Rones
A large pattern with funky shapes and form. An original. Sort of origami-ish.
Source Luuk van Baars
Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
This is indeed a bit strange, but here’s to the crazy ones!
Source Christopher Buecheler
A free seamless background with pink spots.
Source V. Hartikainen
I took the liberty of using Dmitry’s pattern and made a version without perforation.
Source Atle Mo
Psychedelic Geometric Background No Black
Source GDJ
Number five from the same submitter, makes my job easy.
Source Dima Shiper
This pack of filters can help you adding a blocky overlay to objects. May come handy at drawing blocks of stone.
Source Lazur URH
Pattern produced in Paint.net using the Vibrato plug-in.
Source Firkin
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Luxurious looking pattern (for a T-shirt maybe?) with a hint of green.
Source Simon Meek
Love me some light mesh on a Monday. Sharp.
Source Wilmotte Bastien