Looks like some great work.. I'm just wondering why your exporting to max. at least thats what I think you said.. Is it to use the Brazil render ?? Ya know I think there is a 3rd party part to brazil for maya.. might save ya some truble.. but if you get acurat results who cares.. also MentalRay could do this just as well I belive.. just thinking you could save some steps but its no biggy..

Also I can see the qualtiy can be there.. I don't know if its the aliasing settings or the jpg comprestion terned up to high, but it looks like one of them needs to be terned up..

It looks like its going to be great !! really..

about the tyres.. just my .02 but I would NOT displacement map them.. do a little of the geo buy hand and duplicat around.. it will look much better IMHO.. and it will not slow down the render nearly as much.. little more work. but not much considering..

if you were using PRMan I would say displacement map all the way baby.. as its abiltys with it is wonderfull so I hear..

BTW pro looking stuf so far !!