Hi Pilou,

re:
> You can use after the Separate the native hidden function ExplodeMove then Shell

I would not recommend that because then you would have a whole bunch of solids with overlapping surface areas that would need to be removed. When trying to do a boolean on something like that it makes it difficult because you're telling it to make surface/surface intersections on many coincident or nearly coincident pieces.

That's why it's better to do an offset of the individual surfaces to make a surface result to combine using Join and not try to make a whole bunch of individual solids for this kind of case.

- Michael

Sure that was just theorical for a speedy method not one by one... :)

I will study your method!

Thank you so much guys. this is really useful.

Hi Michael, I try your solution and it's work good only small problem I have any idea how to avoid it. see the attached image please. Thank you

Hi albehany, yes those are the areas that I mentioned above that are not smooth on the original model. Surfaces that are not smooth to each other will have gaps between them when they are offset.

So to complete your model you should not offset those surfaces that are blending between different fillet radii, instead build a Network surface from the 4 surrounding offset surfaces.

Or some other things you could try are filling in the gaps you show using Construct > Blend, or trying to apply a fillet to those edges on the base model so it's smooth there so the offsets will naturally meet each other.

It may be better to wait to apply fillets until after constructing the offset rather than putting them on before where they need to be offset as well.

- Michael

Thank you Michael.