Custom Cesium Cartographic Polygon from Spline?

Hello. I have a spline in my editor which I imported for Blender and would like to use it for clipping. Is this something that can be done? I haven’t been able to figure it out yet and I’m wondering if it’s even possible?

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Hi, I’ve done something similar… which is to read in a set of long/lat points and spawn a cesium cartographic polygon (CCP) and set its spline points.

You then add the CCP to the polygons member of the CesiumPolygonRasterOverlay (CPRO). The CPRO is a component of the Cesium3DTileSet:

Does that help?