Rather confused...

[nonnef]

I'm still learning about aerodynamics, but I've been repeatly stumped when it comes to the rear of a car.
Which is actually better, the rounded corners like most cars, or the chopped off strait down rear that creates a kammback?
Or does it really depend on the cross-section of the car?

That being said, what the heck do I need to do to these rear corners to make less drag? Working with one panel at a time to make the design less aerodynamicly challenged. These are first.
Anything at all is possible, so hit me with the best ideas.

As it stand right now:



Pardon the mess. Er, I mean creative chaos.