Mixed Patterns for Photoshop, PSP, GIMP, Affinity Photo, CorelDRAW, Indesign etc gallery (Volume 28) 100 Mixed patterns / Seamless tiles includes minus / negative mixed patterns, wavy line designs, block designs, quadrant tiles and many more PNG / PAT
The mixed patterns can be combined with other patterns using opacity and blending modes such as plus patterns and polka dot patterns and can be used as wonderful pattern fills for custom shapes such as rosette custom shapes and scroll custom shapes
You can find many tutorials such as how to create a two triangle pattern in Adobe Photoshop tutorial
Photoshop Mixed patterns gallery (Volume 1) 200 Mixed tiles including black and white art for all kinds of work. PAT format.
Color Mixed Patterns Gallery (Volume 32) 100 Colorful mixed tiles PAT and JPG format