Model - a polygon and patch 3d modeler. It read and wrote OBJ files. It also had the ability to manipulate UVs, Normals and assign material associations saved in the MTL file format. Included a command language for automation in the form of scripts, or aliases. Since there was no 'undo' feature, a common automated sequence would copy data to a spare place before modifying it - in essence, the users made their own 'undo'. Alongside direct manipulation of the vertex data, procedural deformers were available to sculpt the surfaces using common geometric transformations such as 'bend'.