If I’m not mistaken, in Rhino 5, you used to be able to select whether a boolean difference output was a solid or a polysurface as an option on the command line when doing the difference operation. Rhino 6 does not seem to have this option and only outputs polysurfaces. Is there still a way to have a boolean difference operation output a solid in Rhino 6?
Hello - there is no difference in this between V5 and V6. In Rhino in general, if an object is closed - surface or polysurface, it counts as a ‘solid’ where that matters.