Reflections looks different on different computers

Hey All,

I’m trying to render an animation for a car spot on multiple machines in my office, however, from my test renders I’m noticing a big problem. The reflections in some of the car windows look different from machine to machine. I’m rendering all of the frames from a single project on a shared network to a folder on that same shared server. I even packed the project so I know that none of the other computers are missing any of the files (unnecessary since they are all referencing the same project file anyways). All of the computers are rendering using CPU’s (to avoid GPU confusion) and all of the same settings and preferences.

See attached pictures, look especially at the reflections of the cars in the backgrounds…

Thanks everyone, I could really use some help on this one.