In a collaborative project with English Heritage (Helmsely Store), Dr Duffy recorded several incised pillow stones (Saxon grave slabs) originally from Lindisfarne using Reflectance Transformation Imaging (RTI). The resulting interactive files successfully reveal faint inscription and working/chisel marks as well as natural features of the stones.
Within the specialized RTI viewer, there are several rendering modes that can be enabled to enhance the surface of the recorded object. One of those options, specular enhancement (a mode which makes the surface of the object seem shiny), has been been enabled with the pillow stone files to highlight faint surface relief on the grave stones.
More information on, Hightlight-RTI, the flexible RTI capture approach used to record the Lindisfarne pillow stones can be found by following this link; http://www.english-heritage.org.uk/publications/multi-light-imaging-heritage-applications/