This is a really fun Photoshop action! I purchased it from Envato Market for six dollars. Worth every penny. There is no end to the unique and interesting changes you can make to a photograph.
It takes a few tries to get the feel of it and this is one of my first.
You make a new layer and name it brush. Then using red or green you brush over the photo, in particular the part you want to have the special effects, then run the action and voila! Magic.