Never blame the renderer! As Agentsmith have already pointed out here, textures and lighting are THE crucial parts of any high quality render. Bryce is very capable to achieve HQ renders, but youll need to put some effort behind the parts above. This one here for example, is a fairly quick setup with only 3 radial lights used. I wouldnt go as far as calling it high quality, but just to show what 3 tiny lights can do. :)

Rudolf Herczog
Digital Artist
www.rochr.com