Hi Steve,

> In SW to create this surface I would have created helper
> planes along the edges then used a patch with surface continuity
> to the helper planes. Is there a similar method I can use in
> MoI as I am still struggling a bit with MoI and complex surfaces?

Since MoI does not currently have a patch with continuity or match continuity command, that particular approach doesn't really work very well in MoI - currently in MoI it tends to be better to build one big full surface instead of a half surface that's then mirrored.

It's a lot easier to get a smooth piece if you build the full thing all at once, see here for an example:
http://moi3d.com/forum/index.php?webtag=MOI&msg=1398.18
http://moi3d.com/forum/index.php?webtag=MOI&msg=1398.19

- Michael

So for a case like this a shell/offset friendly version would be something like some sections like this:



Then build a loft or whatever through those to make a larger and more evenly shaped surface:



Then that can be trimmed by a side profile or by the fuselage body to cut away the excess:





Building a full surface instead of only a half piece will make it easier to get a fully smooth end result, and by building it as an extended and more evenly formed surface it will be a lot better quality for doing offsets since it won't have any tightly curved spots or areas that change curvature very rapidly in a small area like the "pole" zone of the previous 3-sided sweep will generate - trying to directly surface a 3 sided thing like that where one side is a lot longer than the others and swoops inwards in a 90 degree bend tends to make bad shaping in the tip area.

3DM model also attached.

- Michael

Thats great. Thanks, Michael.

If you are interested, this is how far I've got:

It's looking good Steve!

- Michael