Im sorry man, the rims are not good at all, are they Nurbs modeled? if so, please take more time on the fillets and general shape, some basics are just wrong, when you for instance have the spokes thin at the center and thicker moving outwards, just looks like those hippy pants, doesnt fit this car at all, you should study bmw rims maybe to see what they do, also the center of the rim is just too small, not enough detail and like pBenjamin said, just flat, everything else on the render is, my, just very very good, inspiring even, makes me keep this for reference work when i finish my project in the near future, but the rim needs to go man,...
I could be wrong, but maybe the exposed side (left)
should receive a lesser amount of light as the sun is on
the opposite end, as sunset. It's not C&C since this is just
a test render, but just something that caught my attention.