i dont know why this was closed.. maybe i did it by accident ? lol, well anyway..
not bad, you should try and blend the c4d more, i like the way it kinda looks like the car is coming out of the c4d, gives it an almost 3d look, just work on the blending
After seeing your car sigs I think you have a case of F.C.S (floating car syndrome) LOL.
The cars in your sigs look like they are floating around.
Need to make some kinda base for them IMO.