Hi Michael,

Ha! The how-to on torus is also a part of command reference help file - revolve :) Thanks.

By the way, when I make a circle it is a "perfect" NURBS with eight control points. As soon as I turn the control points on, I can see a different structure of control point, in order to edit the circle smoothly (you mentioned this mechanism previously...). This is the same for a sphere, cylinder, torus, cone, truncated cone after shrinking a conical trimmed surface, etc., isn't it?

Petr