To get the tile this is made up from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
This pack of filters can help you adding a blocky overlay to objects. May come handy at drawing blocks of stone.
Source Lazur URH
This background image has seamless texture that resembles a surface of gray stone.
Source V. Hartikainen
The original enhanced with one of Inkscapes's filters.
Source Firkin
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
A nice and simple gray stucco material. Great on its own, or as a base for a new pattern.
Source Bartosz Kaszubowski
There are quite a few grid patterns, but this one is a super tiny grid with some dust for good measure.
Source Dominik Kiss
Abstract Stars Geometric Pattern Prismatic No Background
Source GDJ
This is the remix of "Background pattern 115" uploaded by "Firkin".Thanks.
Source Yamachem
No idea what Nistri means, but it’s a crisp little pattern nonetheless.
Source Markus Reiter
The name is totally random, but hey, it sounds good.
Source Atle Mo
Prismatic Geometric Pattern Background No Black
Source GDJ
Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward
Submitted by DomainsInfo – wtf, right? But hey, a free pattern.
Source DomainsInfo
Formed from decorative divider 184 in paint.net. Vectorised with Vector Magic.
Source Firkin
Abstract Ellipses Background Grayscale
Source GDJ
A seamless pattern drawn originally in Paint.net by distorting a slice of background pattern 116 and copying the resulting triangle numerous times.
Source Firkin
You know you can’t get enough of these linen-fabric-y patterns.
Source James Basoo
Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
The image a seamless pattern of a wire-mesh fence.I want you to use this pattern as a lower layer.
Source Yamachem
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