A reader suggested the Mazda CX-3 as being a good example of the phenomenon of the blacked-out C-pillar.
Here is the original followed by my hasty remodelling of the car. The way I see it, the c-pillar of the actual car is just painted black. This is what Citroen does on cars such as the C1. The next step is to replace the body-coloured panel with a material that is inherently black and which is as shiny as glass. I can see what drives this but I have yet to find a good example of the theme.
This theme is turning out to be one worth mining. There is nothing as pleasant as a pet hate. I have not turned my attention to the Opel Adam which features a wacky C-pillar. I wonder if….