I have a little problem when I try to extrude a smooth curve.
I get something like this:

First I thought I was in box mode, but then I realized that it is not so
Since I am trying to learn both Rhino and T-Splines, I thought I unintentionally changed some Rhino settings
So I tried to extrude the same curve with the Rhino extrude command and this is the result:

I am using the trial version of both programs, I had not encountered this problem with T-Splines so far
What's wrong?
Greetings from Italy!
Giuseppe










