Project C.A.R.S.

[Ghieri]

The trees look flat because they are infact flat, they're just textures, not proper models.

Where are the trees flat here?
http://www.youtube.com/watch?v=ITBL_5XzXyA&hd=1

It's also wrong that trees wouldn't be proper models.
Every modern RPG use tree models. Of course, all you can see in a game are just textures, but it's not flat.

Those trees do, in fact, look like flat textures.

You can tell because the perspective on them don't change as the car moves or turns.