Dude! the "shading" is awesome!
I put it in " ^ " cuz shading
isn't an adequate term - it looks like med-dark polished metal!
re: the C-pillar - you didn't say which model it's supposed to be (here anyway) so my only suggestion is to maybe change the back of the reardoor's window
somehow that angle-corner looks more Cadillac than Jag to me.
You got a front view in mind?