Formed by heavily distorting part of a an image of a fish uploaded to Pixabay by GLady
Source Firkin
Number 3 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Prismatic Abstract Geometric Background 4 No Black
Source GDJ
It’s okay to be square! A nice light gray pattern with random squares.
Source Waseem Dahman
Actually, there's no clouds in it, but I think it looks quite nice.
Source V. Hartikainen
Abstract Ellipses Background Grayscale
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
Bit of a strange name on this one, but still nice. Tiny gray square things.
Source Carlos Valdez
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin