A method for producing an item data set representing the three-dimensional configuration of an item includes accepting a first input data set, the first input data set including first data representing at least a first three-dimensional configuration of a first three-dimensional object; accepting a second input data set, the second input data set including second data representing at least a second three-dimensional configuration of a second three-dimensional object; adapting one or both of the first data input set and the second data input set to be combined to obtain an item data set representing a three-dimensional configuration of the item; and combining the first input data set and the second input data set to obtain the item data set. Other methods for producing item data sets and articles of manufacture are also disclosed.