Thank you for all opinion…
Impressive! 
One little detail, some of the wheels seem to have a white outine on the underside that cuts them off from the ground! :-? Other than that! Great work
Bello! (italian for “beautiful”)
Env
real cool 
just one thing… did u use anti-aliasing? i just wonder cause there are edges where the wall touches the ground
very nice… although i would probably spend more time modeling than relying on great texture work.
customs textures? i know the ground plane is pretty easy to find but what did you use for the wheels and grate?
I am sooo impressed!
maybe you could dent the tires a little (the bottom) so that it really looks like there’s some weight on them.
Very very nice.
Paradox
I used anti-aliasing (16 level), but this is scaled this scene in the GIMP with 1800/1200.
I used popular textures for background, ground, and front metal object.
Sorry, but my english language is not good 
I have see this before, it is just a difficency in Blender’s shadowing system. It gets worse the farther you move away the lights.
MarMo:
Nice job on the lighting, BTW. I would like to see a higher-res version.
nice, very impressive.
Very nice.
Model is great,
Objects around it are too… ordered… if you get what I mean
Stefano