With your last example

I believe that you must make some lofts so some sections! ;)

Or some ideas by Barry H
http://moi3d.com/forum/index.php?webtag=MOI&msg=11206.1

Or some subdivisions... ? :)
Look at this bible thread of subdivide in MOi! ;)

http://moi3d.com/forum/index.php?webtag=MOI&msg=9689.1

Hi Gunter,

Since this is for 3D printing you are almost certainly better off using a different type of software like ZBrush. Here's a tutorial on filigree.

https://www.youtube.com/watch?v=n6TVd7vZSII

Making filigree in MoI, or any other NURBS CAD software, would be quite challenging and time consuming. The only reason I can imagine doing that would be if the part needed to be milled.

- Peer

Hi Gunter, yes like Peer writes above it will be difficult to make an organic form like you want in a CAD program where the focus is more on mechanical parts.

You may want to check out 3D Coat in addition to ZBrush for making that type of model.

- Michael