Cesium ION/Context AI enhancer

Hi d5,

First of all, thank you for the new awesome update!

I have a request, that i have been thinking about for a while (and it makes even more sense now after we are able to import Google 3d tiles) It would be super nice and helpfull to and an AI enhancer for google context, the google 3d is always a bit rough. So if it was possible to select the cesium terrain and only enhance that to look more photorealistic would be super nice!

Anyways thanks a lot, have a nice day