Hi,
I am creating an app on Portal which has a 2D web map and a 3D web map. The 2D web map already has a custom street basemap used by our organization, created with a custom tiling scheme.
For the 3D web map I want to use the custom street basemap but also bring in our organisation elevation data for the surface. What is the work flow for this?
I have tried publishing the elevation data as an elevation tile package (based on the same tiling scheme used for the streetmap). However then I get an error saying the tile layer has an unsupported tiling scheme. Each scale must be exactly half of the scale of the preceding level.

How can I use my custom basemap with a custom elevation tile service. (If my custom basemap tiling scheme is not in doubles in terms of the scale?)
Additionally I need to create a vector tile layer for our contour line data as this is very slow to draw. Vector tile services appear to require a tiling scheme which doubles in scales as well (which is not what our custom street basemap users). Will the vector tile layer with a different tiling scheme be able to be viewed with my custom basemap? Thanks