I agree with you Zen - I'm sorry the car doesn't look like this user's property - look at the other content, okay not bad, but look at the chair, you'd think someone who'd be able to make sure a detailed car could made a chair that is more accurate to conventional design and that they'd make a floor for the car that looks well, better instead of using a Cinema 4D shader that doesn't suit the scene.
If that is truly their, then I am impressed, I mean instead of using hypernurbs and 4-sided polygons, they went through the painstaking job of modelling the entire thing out of triangles and managed to get the positioning so precise and perfect you cannot notice any oddities on the surface. (Okay I admit, that data is changed to tris from import and export 3DS, which can be from the external UVMapping process, if so I'd give them the benefit of the doubt if it really is their own, however they're using Cinema 4D 10, which last time I checked provided Bodypaint with the stand alone package and all of the others, which external UVMapping and texturing would have been pointless)
If you are the rightful maker of this model, then I apologise, but there is too much evidence in my mind too that this isn't yours.
But I'll provide crit on the other work - the 'earth' one looks like an experiment with shaders to me, which can be fun as you can see what effects you get, so nice use of C4D's shaders there (Although the water is too blue IMO), the second is a good render, but the chair doesn't feel realistic to me, perhspd use a real chair as a reference.
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