Hi Will,

> select your curve for it to follow and you get a nice inner diameter
> parameter for free that allows you to create a shell for your extrusion.

The tricky part is that not every curve has a diameter value associated with it.

For example, what would you say is "diameter" of this curve:




> Well I tried for example drawing a circle for the profile, I offset the
> circle to make a smaller one (inner diameter) - I selected both
> circles, executed the sweep command and then selected my
> squiggly line - only the outer diameter circle was used for the sweep...

To get this kind of a thing with sweep, you would actually do 2 different steps - first sweep with just the outer circle and turn the "Cap ends" option off so that it has open ends. Then select your open tube and run Construct / Shell to thicken it.

For example:

Sweep:



Then Shell:




The "radius" based UI of Pipe does not really coordinate well with a custom outline since a custom outline needs a thickness and possibly a directional flip option and not any of the inner/outer radius values that Pipe uses. It basically needs a completely separate UI for it.

But it is still possible to create such things, just not with this new Pipe command though - Pipe's UI is focused on circular pipes.

- Michael