Diagonal patterns for Photoshop, PSP, Affinity Photo, Elements, Pages, Illustrator etc gallery (Volume 102) 100 Diagonal patterns / Seamless Tiles PNG format
Related sets include diagonal and stripe line fonts as well as check and checkerboard brush strokes and check and checkerboard font / EPS vector shapes and black and white rectangular and spot and bar patterns
The diagonal patterns can be blended with other pattern sets such as the Colorful Photoshop and elements patterns collection (1080 tiles) and diamond patterns and frame tiles and contour patterns and offsets and circle patterns and they can be used as a wonderful source for brush textures and overlays such as for plus and cross brushes and crescent and lunar curved brushes
You can find many tutorials on the site such as how to create two color triangle seamless pattern in Photoshop
Photoshop diagonal patterns gallery (Volume 101) 100 Tiles PNG format.