I came across this article (link) by Pininfaria about the optimization of a car bonnet. The car is Argento Vivo concept, which seems to be very beautiful, made for Honda but unfortunately was not produced. However the optimization is not quite beautiful. It is a rare article where the properties of the structure is degraded. This seems to be mainly due to the early date of the article (1998) when topology optimization was not widely used, even some of the popular algorithms were not even discovered. I believe a great company like Pininfaria would not make the same mistakes today. The problem is quite trivial, they did not expand the design space to the full usable volume, but used the intuitively designed bonnet as the design space, so there was not much left for the topology optimization software to do, as it was required to remove volume from an already designed volume.
Beautiful
Not beautiful