Hi Michael,

Thank for your answer. I played a little with mesh angles, and yes, it works. Also, I found a script that allows to quickly change the mesh density, that definitely solve the problem of 3D navigation on detailed models.

Regarding rail revolve, I encountered the problem working on a violin.
The first picture is an example of a rectangle revolving on a spiral in MoI, while the second is the same operation made in Rhino.


About deformations: yes, I know how is problematic to deform polysurfaces with a different distribution of control points. I personally do not think that these tools are so useful, since they normally produces very complicated and not so "ideal" surfaces. I was speaking simply about deformation tools for single curves (bend, twist).

BTW, working with MoI is so pleasant, that even if Rhino has many useful commands, and I know well how to use them, after spending few days modeling in MoI, switching back to Rhino interface is hard!