Error loading point cloud 3D Tiles when "region" is used for boundingVolume instead of "box"

[thomaspingel]

I'm looking to load a 3D Tile of a point cloud, but have trouble unless the point cloud's boundingVolume (in tileset.json) is declared as a "box". Those declared as a "region" do not work, and throw an error "Cannot apply a model matrix to bounding volumes of type region. Tileset stays in original geo-coordinates."

Cesium ion generates point cloud 3D Tiles with "box", so these work fine both loaded from the web and when downloaded. However, tools such as gocesiumtiler and entwine -> ept-tools tile generate .jsons with "region". "Region" is part of the 3D Tiles spec, so it'd be great to support it, if possible.

The use case is a massive point cloud I'd like to render in A-Frame, that's too large to convert using Cesium's free tool. I don't know of any tool that does the conversion AND uses a "box".

There's a sample of one with "region" accessible online, created by cesium-point-cloud-generator here:
https://www.3dcitydb.net/3dcitydb/fileadmin/mydata/NRW_Demo/Duesseldorf_Cesium_pointcloud/tileset.json

Really appreciate this toolset! Thanks for building it and sharing it with the world.