• aPriori now provides a “No-Cost Feature” operation which may be assigned to geometry that was extracted as a Core GCD. For example, some CAD models include solid bodies which are intended to represent inserts, not cores; previously these were assumed to be a core, and a default core material and cost always were computed. Now the body still will be extracted as a Core GCD, but the cost can be eliminated by assigning the No-Cost Feature operation.