This adobe photoshop video tutorial will teach us how to create our own multicolor photoshop brush.
In this tutorial it was used to create grassy field, but it can be used for a lot of other applications.
Most beginners think the brush tool is simply used to paint round or square strokes onto the canvas They would be shocked to learn you can easily create an entire grassy field using only the brush tool Craig Campbell will show you how to use brush shapes and dynamics to create your own grassy meadow
Tutorial can be found here
Thanks Chip Springer for the link