Hey, you can actually use Open Cascade with ProjectChrono right now: http://api.projectchrono.org/group__cascade__module.html. There are also some nice tutorials (http://api.projectchrono.org/tutorial_demo_robot.html). A Solidworks add-in was also made: http://api.projectchrono.org/tutorial_table_of_content_chron....

I've only used Chrono::Sensor, Chrono::Vehicle, PyChrono and I work on a new module called SynChrono. Feel free to reach out if you have any questions.