Fix side and a seamless pattern formed from circles.
Source SliverKnight
Simple wide squares with a small indent. Fits all.
Source Petr Šulc.
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
Abstract Ellipses Background Grayscale
Source GDJ
Remixed from a drawing in 'Canadian forest industries July-December', 1915
Source Firkin
A seamless pattern formed from a square tile based on a jpg on Pixabay. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I.
Source Firkin
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
Prismatic Snowflakes Pattern 3 No Background
Source GDJ
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
Abstract Stars Geometric Pattern Prismatic No Background
Source GDJ
Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf
One more brick pattern. A bit more depth to this one.
Source Benjamin Ward
Paper model of a tetrahedron. Modelo de papel de um tetraedro.
Source laobc