Working mirrors in cars.

[jamesw]

Actually, they do work, but because reflections have a significant impact on rendering speed, you don't always see the reflections.

If you take the yellow convertible into the Green Room, one of the "Part Options" called "reflective mirrors" has choices "reflective on set" and "reflective in snapped shots". The second option, which is the default, only shows reflections in snapped shots. So, you can change it to "reflective on set", position everything the way you want, and then maybe change it back to "reflective in snapped shots" for efficiency.

Of course, the settings on the View > Lighting, Shadows, & Mirrors menu also come into play.