message: Name -> MaterialLayerKey.
diff: @@ -9,7 +9,7 @@ using namespace CesiumGeospatial;
  UCesiumPolygonRasterOverlay::UCesiumPolygonRasterOverlay()
  : UCesiumRasterOverlay() {
  - this->Name = TEXT("Clipping");
  + this->MaterialLayerKey = TEXT("Clipping");
  }
  std::unique_ptr<Cesium3DTilesSelection::RasterOverlay>
  @@ -28,7 +28,7 @@ UCesiumPolygonRasterOverlay::CreateOverlay() {
  }
  return std::make_unique<Cesium3DTilesSelection::RasterizedPolygonsOverlay>(
  - TCHAR_TO_UTF8(*this->Name),
  + TCHAR_TO_UTF8(*this->MaterialLayerKey),
  polygons,
  CesiumGeospatial::Ellipsoid::WGS84,
  CesiumGeospatial::GeographicProjection());
  