Rhino has no free tier. I’d love to play with it, and it’s where AutoDesk made the right call. It’s why Fusion 360 has such a strong ecosystem for hobbyists / prosumers.

A more affordable option is Moment of Inspiration 3D (written by the same dev who did Rhino originally) which also has a node editor available:

https://moi3d.com/forum/messages.php?webtag=MOI&msg=11614.11...