Thanks for all of the specifics! Are you sure that your tileset is set to be above the ground? In my experience, tilesets often need a bit of tweaking to sit nicely relative to the base layer. You can manually adjust the position of your tileset like in this code example:
I think this is different. This is related to an ImageryLayer (TMS) which as far as I can tell is only on "Globe". I cannot find a way to add another Globe instance to the scene (I tried adding it as a primitive). Maybe I can add an ImageryLayer as a primitive to the scene with a different ellipsoid than the scene Globe?
Ah, my mistake – the code I posted was for a 3D tileset. Hannah is right. I don’t think we have support for moving imagery tilesets off the surface. Sorry about that!