In the process of making one of my last experimental shows, I used a very dark background for Jean-Cyprien's Rubik Cube style. Jean used a special type of PNG file - an "Indexed Color" file for his miroircadre.png file which allows transparency like a regular PNG file but only has 256 colors like a GIF file to create the beautiful gold mirror frame which reflects the rubik cube in a bed of clouds. I suspect he used this format because the file size is small compared to an RGB PNG file which has