Hi @Kevin_Ring ,
When i first started using cesium, i was using a different cesium ion account tied to a gmail, before making a new account with my .mil email.
Now using the .mil email, I created a new UE4 project using the Cesium Sample Project from the Marketplace, signed into my Cesium Ion account, added some of the many Vricon 3D Surface models, and they did not render in the scene. I double checked, and the objects are using the correct token id.
I also then deleted the 3DTileset objects, signed out, signed back in, and added them again, and they still did not appear.
I also noticed that the Point Cloud Photogrammetry of Montreal and Melbourne provided with a new cesium ion account would not render in the UE4 scene.
The only Vricon 3D Surface Models that would appear when added to an UE4 level are the ones that are provided to all free Cesium ion accounts. “Vricon 3D Surface Model - Washington State”, and “Vricon 3D Surface Model - Washington DC”. All the 3d surface models provided after I verified my account tied to my .mil email do not render in UE4.
Hope this additional info helps,