In Alexandria-Egypt, CEAlex (Centre d’etudes Alexandrines) conducted the first scientific underwater excavations in 1994 on the submerged site of the remains of the ancient lighthouse of Alexandria near Qaitbey fort, since 2014, for the first time in Egypt, with the support of Honor Frost foundation, the center has launched a 3D underwater photogrammetry data-gathering program to obtain a DSM – Digital Surface Model – of the submerged site of the lighthouse, and a 3D model of some artifacts. During this work, many challenges were inherent all over the processing methods to make the result more efficient. For this reason, Photogrammetry and computer graphics may be used to help discover and encode accurate optical properties of materials, such as inscriptions and features of small objects. In this paper we present the result of an underwater research project using mixed techniques between photogrammetry and ’Virtual’’ Reflection Transformation Imaging (RTI) combine with Photogrammetry of a statue base locate underwater, achieved by applying ‘’Virtual’’ lighting to 3D model objects, using multiple images of fixed view-points and varying lighting conditions, these techniques allow virtual automated reconstruction of highly detailed 3D texture-mapped models, to show all visible inscriptions and hidden details of the object using some specific filter and altering the light in RTI after stripping any color and texture information from it, we describe the V-RTI method and critically compare it to the current standard Highlight (H-RTI) method.