Currently, I don't think the way permittivity and permeability are accessed internally allows for this. This would require assigning a set of Materials at a large number of discrete points, which should be doable as long as there are not a large number of materials. Typically, there are only two, and each point will be assigned one of those two materials. That does not sound too difficult to implement. It should be implemented and tests should be written.
Currently, I don't think the way permittivity and permeability are accessed internally allows for this. This would require assigning a set of
Materials at a large number of discrete points, which should be doable as long as there are not a large number of materials. Typically, there are only two, and each point will be assigned one of those two materials. That does not sound too difficult to implement. It should be implemented and tests should be written.