DIAMOND's 3D models can be constructed using a set of basic elements, like blocks, cylinders, cones, spheres or toruses that are usually based upon 2D outlines, or by sweeping a 2D profile or boundary in a circle or along a given path. New models can be created by copying or duplicating an existing solids or by splitting solids using specified cutting planes. DIAMOND allows three dimensional solids to be created from existing 2D utilities such as Staircases and Portal Frames.

DIAMOND provides powerful boolean operations such as union, intersection and difference, giving the user the ability to model many complex shapes.

Survey data, either from data loggers or from other systems, may be broken down into eastings, northings and height information, which can then be used to create a DIAMOND surface. Powerful interpolation and triangulation algorithms ensure that the surfaces closely fit the original data, while input parameters allow tweaking of surfaces to best achieve this aim. Manipulation commands such as cut and fill, or volume calculations may be performed, while a section or contour can be extracted.

Rendering and hidden line removal tools combine with all DIAMOND's modelling functionality to provide a powerful design medium. Several rendering modes are available for the display of shaded model representations, including the smooth Gouraud and realistic Phong. Basic textures can be mapped to the model surfaces to improve realism. Available light sources can be positioned at any required location.

DIAMOND can produce automatic walkthrough paths and store them for later retrieval. Walkthroughs and flyarounds are detailed in terms of a series of points denoting a path through the model. Perspective images are then calculated as though you are walking along this path allowing say an architect to stroll through his proposed building before a brick has been laid.