Fernando Wagner da Silva Ph.D. student at COPPE/UFRJ Research interests: Animation, Motion Capture, Dynamic Simulation, Virtual Reality E-mail: nando@visgraf.impa.br Web: http://www.lcg.ufrj.br/~nando

Luiz Velho Associate Researcher at IMPA Research interests: Physically-based Methods, Wavelets, Implicit Objects E-mail: lvelho@visgraf.impa.br Web: http://www.visgraf.impa.br/People/lvelho

Jonas Gomes Professor at IMPA Research interests: Modeling, Visualization, Image Processing, Multimidia E-mail: jonas@visgraf.impa.br Web: http://www.visgraf.impa.br/People/jonas

Paulo Roma Cavalcanti Associate professor at UFRJ Research interests: Geometric Modeling, Solid Modeling, Image Processing E-mail: roma@cos.ufrj.br Web: http://www.visgraf.impa.br/People/roma