[Pharo-project] Graphics with Anti-Aliasing

All, does somebody has a pointer to a graphics lib/framework/engine for Pharo which works with Anti-Aliasing. My first tests with Balloon2D were disappointing (maybe I'm doing something wrong). But even setting aaLevel does not seem to bring any result. I.e. the line drawing code falls back to superclass code which simply draws the same jagged lines like always. Any pointers? CU, Udo