Dithering

Dithering is a type of gradient in pixel graphics that consists of alternating pixels of two colors. The most popular form of dithering is the alternation of pixels in a checkerboard pattern. Dithering allows using two colors to create the effect of the third color. Pixel Studio has Dithering Pen tool that can be used for making shadows and lights. You can also find some classic gradient patterns from Brushes menu.