If you're the sort who wished your car had a transparent roof when the rain falls down but want some shielding when the sun's up (or, you know, vice versa) then BASF have good news for you. It's showing off the transparent OLED technology it developed with Philips that behaves like glass when inactive, turning opaque when activated. We're already familiar with the technology here, because it's the same kit that the chemicals giant showed off on its custom Smart Forvision it produced with Daimler back in September. As before, it's also been able to pair them up with transparent solar cells, for environmentally friendly sky watching: just remember that people will be able to see you pick your nose from all angles now, okay?