I've created a logo on a transparent layer. It's an eclipse with a carbon pattern and my name going through with a downloaded metallic style. I've made it into a brush, but when I use it on my images, the logo is half transparent and I can see color from the image shining through. How can that be? When I add my watermark to a perfectly white area on an image, there is no problem. But how do I make it so that other colors won't show through?