Proceedings of the First International Conference on Computer Graphics Theory and Applications, Stubal Protugal Februrary 25-28, 2006 / by First International Conference on Computer Graphics Theory and Applications, 25-28, February 2006 : Stubal Protugal, Braz, Jose, editor 650146, Jorge, Joaquim, editor 650147, Dias, Miguel, editor 650148, Marcos, Aderitos, editor 650149