One of the Photoshop effects I played with was Exclusion. I tried applying this to both the white background of the duck image, and to the beach flotsam image. Then I tried just applying it to the beach flotsam image only. Exclusion gives the image an opalescent quality, maybe reminiscent of mother of pearl, something beautiful from the ocean, as opposed to the discarded plastics the tide has washed up. Applying exclusion to both images created in some ways a more subtle image, but I wasn’t as happy with that as I was with the stronger, clearer image.