Hi Nicholas,
Thanks very much for your reply. I am indeed using ArcGIS Pro to create the mobile scene package.
1. I am fine to switch to Vector from Imagery as long as there is some topographic information. I want to create a mobile scene package to use with iOS runtime SDK.
2. I do really need global coverage as it will be used worldwide offline. I want a spinning globe as in the scene sdk and to. be able to zoom to a reasonable detail. certainly not street level or even city level detail. I managed to create an imagery package that was 500 mb and the detail was okay at 1:4,000,000 but ideally I want to improve on that as much as I can.
3. I'm okay with 1-2 GB maximum size for the package.
4. Users are not ArcGIS users and cannot generate their own maps. I will generate one basemap for the users to download once they get the app on their device. Thereafter they will add data layers to their map. I'm stuck getting a very good basemap to begin with. I've tried to create basemaps by just opening a new project from the default global scene option and then trying to create a mobile scene package but I get the error message that that topographic layer "is not supported for world topographic map in runtime".
Any help would be greatly appreciated.