C3 is a company from Norrköping, Sweden, and subsidiary of the aviation and military technology company Saab, with some very impressive demos of photorealistic 3d city models. Like some other companies, they use (oblique) photos as the base technology for the fully automatic production of the city model. Although C3’s technology uses photos only and no LiDAR data, they capture tree canopy as well. According to their website, Stockholm, Copenhagen and Oslo are already realized in 3d.