Many vehicles have no glare/reflection in glass. Makes it look like there is no windows.
As you can see Zamak and buzzard have proper glare and reflection. Many other vehicles look like they have no glass:
[img]http://i.imgur.com/Pq57zQz.jpg[/img]
[img]http://i.imgur.com/A6Jrgg2.jpg[/img]
[img]http://i.imgur.com/6XFN7nY.jpg[/img]