Fig. 5
a Detail of the pigeon head in the right panel in the Dining Room window (Spot 11). OCT tomograms: b Tomogram 86, showing the thick grisaille in the pigeon head. c Tomogram 33, showing the thick grisaille contouring the beak of the pigeon, defining its nares and its mouth; some areas also have thin grisaille which yield volume to the beak. d Tomogram 15, showing the presence of thick grisaille contouring the beak and defining the mouth, and thin grisaille yielding its volume. Solid line: thick grisaille; dotted line: thin grisaille. The tomograms are presented on the same scale