Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
From a drawing in 'Heroes of North African Discovery', Nancy Meugens, 1894.
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
Remixed from a JPG that was uploaded to Pixabay by theasad121
Source Firkin
Prismatic Isometric Cube Extra Pattern No Background
Source GDJ
Sharp diamond pattern. A small 24x18px tile.
Source Tom Neal
Dark wooden pattern, given the subtle treatment. based on texture from Cloaks. https://cloaks.deviantart.com
Source Atle Mo
More leather, and this time it’s bigger! You know, in case you need that.
Source Elemis
Heavy depth and shadows here, but might work well on some mobile apps.
Source Damian Rivas
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Lovely pattern with splattered vintage speckles.
Source David Pomfret
A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
A light gray fabric pattern with faded vertical stripes.
Source V. Hartikainen
Zero CC tileable yellow craft paper; scanned and made by me. CC0
Source Sojan Janso
Subtle scratches on a light gray background.
Source Andrey Ovcharov
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Sharp diamond pattern. A small 24x18px tile.
Source Tom Neal
Vector version of a JPG that was uploaded to Pixabay by theasad121
Source Firkin
Smooth Polaroid pattern with a light blue tint.
Source Daniel Beaton
This is lovely, just the right amount of subtle noise, lines and textures.
Source Richard Tabor
Prismatic Geometric Pattern Background 2 No Black
Source GDJ
From a drawing in 'Uit de geschiedenis der Heilige Stede te Amsterdam', Yohannes Sterck, 1898.
Source Firkin