Remixed from a raster on Pixabay that was uploaded by ArtsyBee.
Source Firkin
Prismatic Geometric Tessellation Pattern 4 No Background
Source GDJ
Classic 45-degree pattern, light version.
Source Luke McDonald
A white version of the very popular linen pattern.
Source Ant Ekşiler
I’m guessing this is related to the Sony Vaio? It’s a nice pattern no matter where it’s from.
Source Zigzain
Fabric-ish patterns are close to my heart. French Stucco to the rescue.
Source Christopher Buecheler
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Prismatic Triangular Seamless Pattern III With Background
Source GDJ
A playful triangle pattern with different shades of gray.
Source Dimitrie Hoekstra
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
This pack of filters can help you adding a blocky overlay to objects. May come handy at drawing blocks of stone.
Source Lazur URH
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I.
Source Firkin
This one has rusty dark brown texture.
Source V. Hartikainen
A pattern formed from a squared tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf
Background formed from the original with an emboss effect
Source GDJ
Prismatic Rounded Squares Grid 4 No Background
Source GDJ
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
A large pattern with funky shapes and form. An original. Sort of origami-ish.
Source Luuk van Baars
Seamless tile drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Wasn't satisfied with the original's colouring. Too much component transfer and colormatrixes yet the results are lacking a bit. So this time it is a simple black to transparent fade, making it possible remixing easily once there will be other blending modes supported as well. Probably in inkscape 0.92.
Source Lazur URH