Can't zoom in to ground with a custom ellipsoid

[omar]

Try overriding the default ellipsoid as shown in this discussion:

So in your code you would do: How to tile Mars themis raster for Cesium - #3 by semper

Cesium.Ellipsoid.WGS84 = vwEllipsoid;

That should fix it.

@copycd

but, my 3dtiles data is not share, due to No having https file service.

You can share your 3D Tiles on the web by uploading it to Cesium ion (Cesium ion). You can create an account for free.