Hi Andrei,

> Hay Micahel, new method to to make revolve with loft! Revolve - 15 sec, Loft - 15 sec!!

Yup, actually that's the method that I had thought you were talking about originally, remember my previous post here? :
http://moi3d.com/forum/index.php?webtag=MOI&msg=6037.10

The main problem with that method is again accuracy - the revolve generates a shape that is 100% exactly a sphere in the top part where you have an arc profile.

The loft through different angled stations only approximates a sphere to some unspecific tolerance level, it's not an exact sphere shape.

It's important for some people's uses of MoI to have accuracy in what they generate.

The easiest way to generate an exact revolved shape that is 100% round and exactly matches one specific profile curve is to use Revolve to do it.

You also get a different kind of history updating when you use a loft through many profiles like you show there - the revolve lets you edit a single profile and the revolve will update as you tweak it, giving you a new exact revolve every time just from having drawn one single curve.

It just tends to be good in general to use the smallest number of curves to generate things, like in this case using only one profile curve and using revolve is just the most efficient way to do it, it only uses one curve. Being able to generate large amounts of your model from a small number of curves is basically the key thing that makes NURBS modeling powerful for mechanical shape design and different from sub-d modeling.

For Loft in addition to replicating the curves you also have to set the "Closed" option which is not on by default. And again, needing to use some sequence of steps and special options to generate a really basic shape like this is a barrier for someone who is learning MoI to be able to create a simple shape like this...

- Michael