SamScene3D has today shared via their Facebook page a total of three screenshots showcasing the upcoming version of their Rome City X scenery. Based on the post, the new version, version 1.3, should be coming today.
The changelog has not been shared yet, and the update should be free of charge for current owners, but we do not have that information confirmed by the developer. The current version (v1.2), in comparison with the original version (v1), features new landmarks added and improved night lighting textures.
Source: SamScene3D Facebook page