A product the document makes: the body it is, under a stable id that renaming keeps, with its
material, appearance and properties. A body no part names is construction geometry. material is
the id of one of the document's materials, or { "expr": "..." } that gives one, so a parameter
can choose it.
A product the document makes: the body it is, under a stable
idthat renaming keeps, with its material, appearance and properties. A body no part names is construction geometry.materialis the id of one of the document's materials, or{ "expr": "..." }that gives one, so a parameter can choose it.