Hi @CHRIS_KATAMBO,
Just wanted to add - if you’re interested in only streaming a small area, you can use Clipping and Cartographic Polygons to only render the area inside a selection. Here are two forum posts that will hopefully be of help:
This is the basics of using Cartographic Polygons. By default, it will cut a hole out of the tileset in the area you define. Cesium Cartographic Polygon - #2 by agallegos
This is how you can invert the clipping effect to apply to everything OUTSIDE the selection, rather than inside. How to use multiple terrain? - #5 by agallegos
Let me know if this helps!
-Alex