trying to take on the unusual rear-cut of the car
the BMW Z3 coupe

my progress

try to make a hillclimb or TA or something weirder than original.

Whoa, looks extreme. There's something strange about that rear arch that doesn't go with the curves of the car, You might be planning it to be a vent hole on the other side of it. Those HRE wheels are OK, but there are many other that might be even better, plus they look a bit low res. Other than that looks like an interesting chop so far, it's a great base to start with. Good luck with it!

Interesting start. Gonna be totally crazy I presume?