Sun roof
So I just got a newer car, a mid-size sedan with a sunroof (first time for that feature). I am very fond of driving nude because I find it most comfortable for long trips on interstates and rural highways. I'm mindful of traffic around me, but generally now only cover up for buses, and don't concern myself with passing big-rigs. I suppose that a sunroof does increase the likelihood that somebody in a high cab can see in, but not sure. Any truckers with a thought about that?
It's easy enough to keep the sunroof covered, but it certainly does brighten the dark interior of the car when the cover is open.
Even if you are stopping next to a big rig if you cant see the trucker from your sunroof then the likelihood of them seen you nude is impossible (which from my experience you cant). Its more likely for them to see in through the passengers window if you are a lane or two over.
My car has a big sun roof. Opening it just lets more light in so my parts are fully illuminated (and tanned). The trucker's view and that of coach passengers is through my passenger window. I guess they can see me better with the better illumination.
Driving a convertible with the top down is something else!