retirado,
seems to me you are looking into a picture representing your project, and not into a movie...a quick solution with very decent results without using onyx or any heavy duty computer or expensives softs, is to prepare model in ac with just a few 3d elements like cars, trees or none, export to artlantis and make illumination sell, take the occasion to put textures (no trees) then take it to piranesi and add more texture if needed, now use imagecels trees, people, cars, your family, your dog, friend, owner of the bldg and the like, screw ups are allowed cuz now you take it to phshop or any of those, photopaint, etc. and do your final touches, clean up, more people, deletions, picture brightness, etc...jpegs are good enough for me and all this should take max 3 hrs......hey, and dont get me wrong. ..i love quality
MACBKPro /32GiG / 240SSD
AC V6 to V18 - RVT V11 to V16