Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
Prismatic Geometric Tessellation Pattern 2 No Background
Source GDJ
This pack of filters can help you adding a blocky overlay to objects. May come handy at drawing blocks of stone.
Source Lazur URH
An emulated “transparent” background pattern, like that of all kinds of computer graphics software.
Source AdamStanislav
Produced using the clouds, flames and glass blocks plug-ins in Paint.net and the resulting .PNG vectorised with Vector Magic.
Source Firkin
Derived from an image that was uploaded to Pixabay by darkmoon1968
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
An interesting dark spotted pattern at an angle.
Source Hendrik Lammers
Prismatic Geometric Pattern Background No Black
Source GDJ
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Light honeycomb pattern made up of the classic hexagon shape.
Source Federica Pelzel
This was formed by distorting an image of a background on Pixabay.
Source Firkin