In other words, they get a fancy paint spatter brush and the simply use it by clicking once or perhaps a couple of times to add the image. People often use brushes not as brushes at all but more like stamps. The Brush option pallet simply gives you many more ways to use both existing brushes and those masterpieces you have created yourself. There is a great deal of fun and creative possibilities in creating your own custom brushes in Photoshop. I use this setting quite often to create images with rough edges or irregular edges. Under shape dynamics you can turn you angle jitter up to rotate the brush as you drag it. You can also apply a jitters of various settings to create random color as you drag your brush. You can set things like shape, scatter, texture, color, wetness, color etc. With the brush options pallet you can set characteristics of how the brush behaves when you drag it across the canvas. I use this so often that I have it permanently docked on the right side of my screen.

If you do not see the brush options pallet got Window > Brushes. And depending on how you intend to use your brush you want to be certain to also play around with the large number of setting available in brush setting pallet. You can play around with this to get some pretty interesting effects for your final brush. For example adding something that is 50% grey in color to your brush will produce a 50% transparent or 50% opacity brush. When you create the brush, anything on you screen that is white is considered transparent, anything black 100% opaque and everything in between shows as varying degrees of or opacity depending on how close it is to black or white. While that is really all there is to it there are a few things to point out that might be off some assistance to you when creating your own brushes.

Hit Ctrl + A to select the entire image.

(or any image with the understanding that it will be converted to grey scale.)

Create or open any black and white or grey scale image.

Creating brushes in Photoshop is remarkably simple.

Create custom brush photoshop