This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Looks like an old wall. I guess that’s it then?
Source Viahorizon
Formed by heavily distorting part of a an image of a fish uploaded to Pixabay by GLady
Source Firkin
A comeback for you: the popular Escheresque, now in black.
Source Patten
Retro Circles Background 4 No Black
Source GDJ
Bumps, highlight and shadows – all good things.
Source Badhon Ebrahim
Here's a camo print with more tan and less green, such as might be used in a desert scenario. This is tileable, so it can be used as a wallpaper or background.
Source Eady
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Abstract Stars Geometric Pattern Prismatic No Background
Source GDJ
Prismatic Curved Diamond Pattern 5 No Background
Source GDJ
This one could be the shirt of a golf player. Angled lines in different thicknesses.
Source Olivier Pineda
A subtle shadowed checkered pattern. Increase the lightness for even more subtle sexiness.
Source Josh Green
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
An alternative colour scheme to the original seamless pattern.
Source Firkin
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin