1. A user can work with parametrical cut or open a scanned 3D model - more realictic facet positions and symmetry deviations.
2. The single ray tracing mode can reveal light path coming to diamond from any point. One can see the difference between light path in the assher cut (left picture: light goes out after 2 internal reflections) and in oval cut (right picture: 7 internal reflections).
3. One can see a photorealistic image of a cut stone with given absorbtion spectrum. In a contrary to usual belief that the deeper stone will have more saturated color appearance it is shown that the flatter oval cut is more saturated because the average light path is longer. Important: photoreal images should be compared at the same illuminating and viewing conditions.