Starting with a light box image of flowers arranged vertically (shown below), I created an L-channel LAB inversion, as well as a variant using the Exclusion Blending Mode. I curled the Exclusion Blending Mode version to the verso of the virtual inversion, and added the curled combination to a background “wall.”

To add a trompe l’oeil effect and some verisimilitude, I photographed a thumb tack on black in three positions (every corner but the curl), and added the tacks to hold the virtually double-sided flower composition on the virtual wall.