Smart Graphics : 4th International Symposium SG 2004 Banff Canada May 23 25 2004. Proceedings This book constitutes the refereed proceedings of the 4th International Symposium on Smart Graphics SG 2004 held in Banff Canada in May 2004. The 10 revised full papers and 8 revised short papers presented were carefully reviewed and selected for presentation. The papers address smart graphics issues from the points of view of computer graphics artificial intelligence cognitive science and fine art; they are organized in topical sections on virtual characters and environments tangible and hybrid interfaces and graphical interfaces