McNeel, the developer of Rhinoceros 3D, offers one legitimate free method: 90-Day Evaluation License : You can download a full-featured trial from the official Rhino Download Page
A: Yes! The trial lets you use all features for 90 days. After that, it becomes a viewer – you can open and explore models but not save new work. That is the official “free forever” mode. Rhino 7 License Key Free Rh70 BETTER