Printing issues with solids

I have no control over how my solids look when plotted. After quite a bit of struggling I found the rasterize-option but I'm having a hard time believing that's as good as it gets. See for example the screen shots below. The first one is from sheet view and the second from the pdf (same happens on paper). This is the top view of a 3D model - display style filled hidden line. Isn't there a setting somewhere that allows me to plot what's on the sheet? I'm using V8i (SELECTseries 3). All help greatly appreciated.