There is a chapel in the village where I live that was turned into a teaching room by the previous tenants, and defaced in many ways by time and carelessness. As the new owners turned it into an art gallery, they were keen on having a way to visualise the original state of the room, the way it used to be when nuns use to inhabit the place.
This work of restoration was done by extensive photographic survey of the chapel, the one photographic evidence of the period and a lot of digging and deduction work from the traces left in the room despite the years.
The Final animation