tape placed over the wrap. Seems to be very popular to do on high end exotics (lambos especially). You can google tron car wrap and probably find some similar designs. The reflective tape does show up at night depending on the angle you are viewing it from. There is a prismatic chrome wrap film that trumps all of these and is sure to send bystanders into a seizure when viewed. Not something I would choose to do personally but I guess if you need lots of attention.
https://www.youtube.com/watch?v=V1_vVjYwJKQ
Fast forward to about 2:58 when it goes through the tunnel. BTW...I think this is Justin Beiber's japanese cousin.