I've just been sent a copy of a paper recently presented/published on "Virtual Relighting of a Roman Statue Head from Herculaneum: A Case Study", which may be of interest to those involved in digital reconstructions of Vesuvian archaeology.
The work was carried out last year by teams from the University of Warwick (and Southampton), in collaboration with the Herculaneum Conservation Project, and the Superintendency.
The full bibliographical reference is:
Jassim Happa, Mark Williams, Glen Turley, Graeme Earl, Piotr Dubla, Gareth Beale, Greg Gibbons, Kurt Debattista and Alan Chalmers. "Virtual Relighting of a Roman Statue Head from Herculaneum: A Case Study". In AFRIGRAPH '09: Proceedings of the 3rd international conference on Computer graphics, virtual reality, visualisation and interaction in Africa, page 5-12, New York, NY, USA, 2009. ACM.
Given that these conference proccedings are increasingly hard to track down, do feel free to email me at s.court [at] herculaneum.org if you'd like to get hold of a copy.