Just like the black maze, only in light gray. Duh.
Source Peax
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Classic vertical lines, in all its subtlety.
Source Cody L
A dark pattern made out of 3×3 circles and a 1px shadow. This works well as a carbon texture or background.
Source Atle Mo
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
Prismatic Triangular Background Design Mark II 5
Source GDJ
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Everyone needs some stardust. Sprinkle it on your next project.
Source Atle Mo
A comeback for you: the popular Escheresque, now in black.
Source Patten
From a drawing in 'Jardyne's Wife', Charles Wills, 1891.
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
Looks like an old rug or a computer chip.
Source Patutin Sergey
Lovely pattern with splattered vintage speckles.
Source David Pomfret
From a drawing in 'The Quiver of Love', Walter Crane, 1876
Source Firkin
The starting point for this was a texture drawn with the 'Radial Colors' plug-in in Paint.net.
Source Firkin
Prismatic Polka Dots Mark II 2 No Background
Source GDJ
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
A repeating background of beige (or is it more vanilla yellow) textured stripes. One more background with stripes.
Source V. Hartikainen
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
A dark one with geometric shapes and dotted lines.
Source Mohawk Studios