Damn, this is the kind of stuff I can get into

Those wheels are nuts, are they based on something existing?
Great materials btw, if I could give some constructive crits: the ground shadows could use some definition, they're a bit too soft for how strong they are. You should try to find some high-res backplates to use, the blurriness (in the tree branches for example) is a bit distracting. Otherwise fantastic stuff!