First, the decorative film. BMW says the decorative layer will preferably be a smart glass LCD layer that can be switched between transparent and opaque. It can also be an e-paper layer that can switch between two colors. BMW is not limiting itself, however. It also mentions a wood veneer for old-school Bimmer fans.
The display layer consists of thousands of display balls in either white or black or whatever color combination a customer opts for. When a positive or negative field is applied, the black and white pigments move to opposite sides. This gives a customer the desired color, which will be activated via a switch in the cabin. The same technology can also be applied to interior design elements.
Because the decorative film can be applied to any three-dimensional object, a BMW owner can decorate the oversized grille in the same or contrasting color. Imagine a black BMW M3 that can change the color of its controversial grille.