HOW TO CREATE A BRUSH IN PHOTOSHOP

Open Photoshop, create a shape or put an image on the document you just opened. Here are two examples, one of a shape created in Photoshop, the second of an image placed in photoshop.

For the brush we’re creating to have a transparent background, we have to remove the Background layer, so select it and delete it. Your image or shape should have a transparent background now.
Select the layer containing your image or shape. Then Select “Edit – Define Brush set” from the menu bar.

Give the brush a name and “OK”.

If you press “B” on your keyboard and check the list of brushes, you’ll see your new brush. Make sure you save your brush before you quit Photoshop or load another brush set to avoid losing your new brush.

Hope that’s clear enough, if not, drop a comment.

NOTE:

If you do not make the image you want to use to create the brush have a transparent background, the Background layer/color will also be included in the brush and since brushes are created in grayscale, the outcome when colored may vary from your desired outcome. You can use blending options as well when creating the brush for some nice effects.