The Mount Painter and Mount Babbage Inliers, located in the north-eastern Flinders Ranges, consist predominantly of Palaeoproterozoic to Mesoproterozoic metasediments and granites, and Neoproterozoic to Cambrian sediments of the Adelaide Geosyncline. The entire region is much endowed with mineralisation, including that of uranium, rare earths, copper, gold and base metals. PIRSA's Mount Painter regional basement 3D geological modelling work began with identifying the statigraphic units that were to be modelled. Due to the complexity of these elements of the project, the stratigraphic pile constructed for this model represents packages of units aggregated into single units. The input data were prepared utilising appropriate subsets of PIRSA's geoscientific database and spatial data library. These data sources included elevation, solid geology, surface geology, faults, field observations, and subsurface sectional interpretations based on geological interpretation of unconstrained geophysical inversions. 2D points were used to define the contact planes between units as parameters for interpolation into 3D objects. In addition to the topographic section (top-down view), the modeller created cross-sectional views of the input data, and added further observation and contact points. Stratigraphic pile and contact relationships between units (erosive or onlapping) are further parameters used by 3D GeoModeller for performing model interpolations. After these types of 2D input data points were added to the 3D GeoModeller sections, the 3D model was computed. Geomodeller uses kriging interpolators to compute a three dimensional model, utilising the above-described rules of layer and unit geometric limits as defined by the modeller.