Manifold Solid

[Burkhard]

I try to use TIG's Slicer5.
The Group must be a Manifold Solid. Can someone simple explain what it is?

[pilou]

a volume with edges of facets very well "welded" between them!
If you put water inside the inner volume of an object no liquid can be escape!

[Rich O Brien]

It must report as a Solid in the Entity Info

Any internals must be removed

[Box]

I think Tig said it best, I believe this was chiseled on a stone tablet and handed down.....
@unknownuser said:

A manifold solid has the following properties...
It is a group or component that contains only faces and edges - no nested groups etc [it can contain guide lines/points as these are non interactive with any geometry]
In addition to the faces/edges rule... every edge must have two faces - no fewer and no more.
So that means no unfaced edges, no flaps, no 'holes' in surfaces, no internal 'partition' faces where an edge can have three or more faces, and no shapes meeting with a shared edge - like two boxes touching at an edge that could then have an edge sharing four faces.

[Burkhard]

Thanks to all!

[dale]

thomthom's "solid inspector" ruby is a great help in finding all those loose ends