The origami balls made of gold foil and white stripped paper were one of my DIY projects this Christmas. I made myself a black box from black foamcore and used that to do light painting in blue and green. I also photographed the balls without light painting. In PS I blended the two photos using Difference Mode. There were a lot of cool outcomes with other blends. This was fun with the help of my technical consultant, Mike, to get all the settings figured out.