I have the same issue as @Tim Perks(correct me if I'm wrong), just to be clear, it is a "know how" issue. This not a 3D render issue, it's a 2D graphic representation problem. If we are on the same channel, what we need is to know how change the 2D graphic representation of individual window elements. In my case I want to show the window frames in a solid black fill and the rest in white fill. Does anyone know how to achieve that?