1. A method of scanning a split-cast model, comprising the following steps, which can be executed in an arbitrary sequence: holding the various model parts of a split-cast model by a model part holder and scanning the various model parts while being held by the model part holder; and making one or a plurality of additional individual scans, wherein during an individual scan an individual model part of the various model parts of the split-cast model is scanned; and prior to scanning removing the individual model part from the model part holder and holding the individual model part independently of the model part holder; or retaining the individual model part in the model part holder while removing adjoining model parts so as to improve the optical accessibility of the individual model part.