3D tiles layers support an ellipsoidal vertical coordinate system in WGS84 as defined in the OGC 3D tiles specification. ArcGIS applications such as Scene Viewer and ArcGIS Earth only support gravity-related coordinate systems. To draw the web scene in one of these applications, the 3D tiles layers is transformed to a gravity-related vertical coordinate system such as EGM96.
Solution
No action is needed, as the 3D tiles layer is automatically transformed to a gravity-related vertical coordinate system.
Additional information
For more information, see Analyze your GIS resource.