It is based on ACIS modeling Kernel and saves model in SAT format, which can be converted into any other standard formats. SAT files are standard files accepted worldwide. NISA-3D modeler integrates wire frame, surface, and solid modeling by allowing these alternative representations to coexist naturally in a unified data structure. Bodies can have any of these forms or combinations of them. A solid can have faces missing and existing faces can have missing edges.
Solids can also have internal faces that divide the solid into cells.
By default the program save files with .SAT extension. A part can be viewed at different orientations to visualize it correctly. A wire frame model defines an object only by its edges and vertices. A surface model is similar to a wire frame model, but defines an object by its visible surfaces, including faces. Geometric entities Geometry menu lists the following tools to model the geometry directly.