Here is an amazing and colorful cake that changes color according to how you look at it!
No magic or complex components here, since this is just an icing technique, which allows to show a different color depending on the angle from which you look at the cake.
The decorator ices the cake and uses a frosting comb give it a wavy pattern. Then an airbrush machine is used to apply color in one direction and then turn it on the other direction and adds the second color, avoiding mixing the two colors. By having a texture on the cake, it makes it easier to do these effects!