""""""I can make it with a mill or 3d printer""""""

Not really. In the real world, there would either be "some amount of material there" or "no material there and some amount of gap"....

In the real world, there is no such thing as "just a surface"...

So, you could either cut a very small gap in that corner, or fill in the corner with a very small volume. Both could be not really noticable to the eye

Hello Michael,

I thought that solid++ uses the Radial Edge Datastructure by Kevin Weiler. Am I wrong? Or is it used only internally to keep compatibility with other systems?

Have a nice day
Karsten

Hi Karsten, yes that's true that Solids++ is able to represent a non-manifold edge if desired and things like the booleans will use that during part of its data processing, but after the boolean calculation is completed MoI will decompose objects into manifold volumes and only put manifold objects into its own geometry database.

There are a lot of various difficulties with trying to work with non-manifold structures as a regular runtime object representation, things like import/export to other CAD systems, and other operations like filleting are not expecting to work with them.

- Michael