I took the liberty of using Dmitry’s pattern and made a version without perforation.
Source Atle Mo
Prismatic Groovy Concentric Background 2
Source GDJ
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
A background pattern with green vertical stripes. A new striped background pattern. This time a green one.
Source V. Hartikainen
By popular request, an outline version of the pentagon pattern.
Source Atle Mo
It looks very nice I think.
Source V. Hartikainen
This is a grid, only it’s noisy. You know. Reminds you of those printed grids you draw on.
Source Vectorpile
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Medium gray fabric pattern with 45-degree lines going across.
Source Atle Mo
The image depicts a seamless pattern which includes hexagonally-aligned gourds with BG in light-brown.
Source Yamachem
Have you wondered about how it feels to be buried alive? Here is the pattern for it.
Source Hendrik Lammers
This is a grid, only it’s noisy. You know. Reminds you of those printed grids you draw on.
Source Vectorpile
Prismatic Groovy Concentric Background No Black
Source GDJ
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
A textured orange background pattern with vertical stripes.
Source V. Hartikainen
The image is a seamless pattern of a fishnet.
Source Yamachem
This is the remix of "blue wave-seigaiha".The image depicts a seamless pattern of the front upper part of Japanese five yen coin which is used currently.This design represents a rice with ripe golden ears.
Source Yamachem
Prismatic Groovy Concentric Background 2
Source GDJ
Prismatic Geometric Tessellation Pattern No Background
Source GDJ
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
That’s what it is, a dark dot. Or sort of carbon looking.
Source Tsvetelin Nikolov