I made a collage of black and white photos for a 1/2 sheet cake for a customer's husband. The photos were varied in quality and colors of black and white. A solution to this problem was to tweak the collage into a sepia tone. The cake was all chocolate; however, after the chocolate ganache icing hardened I put a thin window of white butter cream over the top surface and then laid the edible transfer that I had created. I was requested not to use any flowers/leaves on the cake - only geometric shapes!