SPEOS quality photometrically accurate lit (and unlit) appearance visuals using SPEOS VE module (Visual Ergonomics). Many automotive OEMs request SPEOS quality renderings of external lighting designs as part of their development sign-off. These visualisation now extend in to the interior and ambient lighting of vehicle cabins / cockpits. Virtual prototyping the interior and exterior of a vehicle can avoid costly mistakes being made and potentially avoid the physical prototyping stage. Applicable to marine, aviation, transportation, consumer goods industries not just automotive. Critical in assessing homogeneity of the lit appearance or illumination.