Yeah, some place of my new map should be like this but with better actors If you want to do it though go ahead, It's unlikely I'll find the time to make a full fledged map soon...
Camera is usually overriden by the map, it tries to locate the cc IIRC https://github.com/0ad/0ad/blob/965f7c7e0afdac1b83c3a31c4fe702cdc1be18cf/source/graphics/MapReader.cpp#L1112