How to set clamp to ground for 3d tiles?

Thank you Omar,
No, I didn’t use the Cesium ion.I didn’t found where to upload my b3dm files, it only support image and terrain files.

Could you show me how please?Or is it not a free feature?

Omar Shehata omar.sameh.shehata@gmail.com 于2018年9月12日周三 上午1:13写道: