Specify Cesium cartographic polygons by latitude and longitude

Cesium for Unreal
1

Hello,
I specified the hidden area using the web tutorial, but the range of the hidden polygon is shifted.
(Clipping Tilesets – Cesium)
How can I improve it?
Is it possible to specify Cesium cartographic polygons by latitude and longitude?

2

The polygon vertices can only be specified in Unreal world coordinates. But you can easily use functions on the CesiumGeoreference to transform longitude/latitude/height to Unreal world coordinates.

3

Thank you for your answer. Even though I am a beginner, I will try my best.