Function make_volume 

pub fn make_volume(
    model: &mut Model,
    faces: &[Shape],
    tol: Tolerances,
) -> OgeomResult<Built>

Solids from an unordered soup of faces: sew, demand closure, nest shells into solids and voids: the pipeline’s own final stages offered as a builder.

Errors

OgeomError::Construction if a shell fails to close; an open soup encloses no volume, and saying so beats guessing.