Hi Brian,

re:
> So to clarify my understanding, the Sillouette result depends on the View, or cplane view "direction".

Yes it's the view direction. Except for if you use the 3D view and it's a perspective projection. In that situation it traces a silhouette based on the projection of a point in 3D space towards the camera/eye point.


> And this direction corresponds to a "pull direction" that would be impeded, for a mold to form the object would use, to release the object?

Correct.


> So a different pull direction would be needed, to release the object? Or the object might need to be cut into different sections?

I think usually it means the object needs to be modified so that it doesn't have an undercut like that.

- Michael