For some reason when I stamp a picture with one of them, it goes on incredibly transparent. I've tried playing with the brush presets, but don't know enough about them. How do I make it come in as a image and not a ghost?
The white highlight and the grey parts of the rock are transparent. Stamping them ontop of a white background should fix the transparency, and I'm not sure if there's a more efficient way to do it, but you could use the brush on one spot multiple times until the spot is just a floating white glob then you could apply the brush.