The project 'Digital Materiality' examines new methods for describing the reflection of light on surfaces. For this purpose, we improve advanced imaging techniques like PTM (Polynomial Texture Mapping) and RTI (Reflectance Transformation Imaging). These methods are adapted to works of art and their complex materiality in order to develop innovative approaches in art history research. Within the project we focus on early prints and mediaeval mosaics that are documented with RTI. The resulting digital models enable us to examine new ways of analyzing these objects in a virtual research environment (VRE).