Hi Pilou,

> But there are imperfections inside face object! ??

Which ones do you mean? There are some areas with multiple vertices - that is the proper result of a constant thickness shell just like I was showing in that previous example.

To maintain a constant thickness it can require a different vertex structure on the output shape than the input shape, again see that previous illustration I posted here: http://moi3d.com/forum/index.php?webtag=MOI&msg=1939.10 for an example.

You can't have both a matching vertex-for-vertex on this shape as well as constant thickness, you have to choose one or the other.

There is probably some way to have rounded type patches in those corner areas instead of having the planes extend to meet each other in a sharp corner - the one I show there has the straight extension method.

EDIT: actually no - since that one I shelled to the inside I think that is the proper result there isn't room to fill in rounded patches like there might be for the shell to the outside direction...

- Michael