Hi Raven, yeah a sketch graphic of what you are talking about would help me understand more clearly what you are trying to describe.

There are probably some difficulties with what you are describing there... One is that on a non-planar curve it's quite difficult to create a good surface going through it just from scratch as you seem to be describing - there is not just one immediate solution to such a surface and so usually it's more practical for something like this to actually slice up an existing surface since that is better defined.

The main thing that I would be shooting for would just be something like trying to make it easier to get the same kind of result shown here just with fewer steps involved:
http://moi3d.com/forum/index.php?webtag=MOI&msg=3024.4

Is that basically the same kind of thing that you're talking about or are you thinking of something fairly different from that?

- Michael