Conclusion
(1) Implicit surface (metaballs) can be displayed with high accuracy (without polygonization).
(2) Various shading effects for implicit surfaces can be simulated.
(3) Because of the effectiveness of Bezier clipping, we can develop an interactive system through the Internet.
http://www.eml.hiroshima-u.ac.jp/~nis/javaexampl/demoEng.html