The attempt to create an interpretative model of a timber and earthwork castle addressed a number of general issues about three-dimensional modelling in archaeology. Such problems are integral to any reconstruction modelling effort, but in many instances they have largely been left on one side. However, the nature of this site meant that this was not a realistic option in this case: the degree of hypothetical reconstruction involved, the nature of the building materials and material evidence, and the significance of the topographical aspects of the site meant that these issues had to be addressed head-on.