The 2D implicit plots are produced from implicit equations f(x,y)=0, and are the most difficult plots to produce. The algorithms to calculate implicit plots are quite complex and time consuming. While obtaining implicit plots one of the more important aspects is their accuracy. Here I show an average implicit 2D plot from MuPAD and its JavaView image.
Image obtained in MuPAD.
The same model in JavaView with some minor changes.