From the Phlearn YouTube Channel:
Today Aaron shows you how easy it is to make your own custom brushes in Photoshop! Learn how to turn any shape into a brush and how to add randomness as you paint, perfect for creating realistic atmospheric effects like rain, fog, and snow. Best of all, our new custom snow brush is included for free in the sample image download!
Download the Sample Image and Custom Brush
B&H carries Adobe Photography Plan subscriptions.