ENH: Update rib
Update the RIBProperty and RIBExporter to work with a modern implementation of Renderman. This topic is using the newly released, free, Renderman: https://renderman.pixar.com/view/renderman
Update the RIBProperty and RIBExporter to work with a modern implementation of Renderman. This topic is using the newly released, free, Renderman: https://renderman.pixar.com/view/renderman