Hi Pilou,

> I don't see why the use of Scale 3D will be forbidden in this case?

Maybe it isn't, it depends on what Marco's specific design needs were.

Since he was talking about shelling originally it seemed like he had a design goal of making a shape with a constant thickness.

If that was an important design goal for him, then he can't use the Scale 3D as a replacement, since it will not produce a shape of constant thickness, so not adhering to the design goals....

Maybe his design goals were flexible enough in this case to be able to tolerate a deviation from uniform thickness, only he can really determine that.

Often times when shapes are being used for engineering and physical model building it is just not a very desirable option to replace pieces with similar ones that just look pretty close with a basic visual inspection - that's usually fine when you are only going to be rendering your geometry but manufacturing your geometry tends to have a lot different set of goals...

- Michael