Hello everybody, we updated RSim application and does not longer depend on GRAS. It faces Geant4 (thanks to Makoto Asai’s work!). One can set up CSG, import CAD, set up General Particle Sources and multiple types of mesh and volume tallies. Scoring results are visualized using embedded VisIt. The download and documentation are at https://www.txcorp.com/rsim. We allow 30 days free trials and hope to get suggestions and bug reports.
Best regards,
Svetlana