Khalil, MohamedOmar, KarimOransa, SamehGabriele Guidi and Roberto Scopigno and Pere Brunet2016-01-062016-01-062015978-1-5090-0048-7https://doi.org/10.1109/DigitalHeritage.2015.7413897This paper aims to show how the 3D unit at the Center for Documentation of Cultural and Natural Heritage (CULTNAT) tackled the conflict between High visual quality and high performance in Virtual reality application by implementing a set of techniques in order to reach the highest performance and visual quality, Keys to Rome project as an example of this practice.The challenge was on two levels. The first level was optimizing the scanned museum objects making it look realistic and in the same time small in data size, level two was the 3D scene/location were the user will navigate.virtual realityretopologynormal mapkeys to RomeVmustphotogrammetryAmbient Occlusion map.10.1109/DigitalHeritage.2015.7413897