Its always cool when you have the chance to work in a really interesting asset, something that you haven't tried before and represents a real challenge for you. That's more o less the case with this metro wagon. Its supposed to be a damaged wagon, planed to be in the middle of a scene hanging from above. The material its a multi-subobject of two materials. The first is the metro in the good state and the other is the damaged one. The model works as a mirror, one side is normal and the other is damaged. That gives you the chance to have both models of the same metro, having for example two complete wagons in the normal state and one damaged (the one that supposedly has received the impact).