Hi Tommy, I guess the difference is that MoI does not particularly have any operation within its own functioning that really depends on the normal direction right now.

However, XSI's rendering function does behave differently depending on the normal direction... So that makes a lot of sense for them to have a flip function as part of their toolbox. It would be nice if their flip function wouldn't discard this important model data though.


> There is little need for this when you do normal polygon modelling.

True, but it seems like rendering is a pretty big function of XSI as well... Isn't that what you are using it for in this case? For rendering CAD data having accurate vertex normals is a really significant thing.


> I don't know how user normals are treated when you edit or deform the
> model, but this is a massive challenge to do right IMO as well.

It is for a fully general edit like tweaking a single point. But for a full-object rigid body transformation like move, rotate, scale, mirror or flip, it is really easy.

At any rate, I do want to add the ability to flip inside MoI in the future it just won't be a part of version 1.0 .

- Michael